2 Web camera interface and capture in labview
Dear Friends,
I am trying to capture images with 2 USB cameras (HP web camera) located at 2 different positions. But i could connect 1 camera only, even that picture also clear. I could not do any camera setting.Can anyone help me......
Thanks,
Klattan
Hi Klattan,
see this link:
http://forums.ni.com/ni/board/message?board.id=170&message.id=382013&query.id=370045#M382013
With some transformation you anyhow should be able to work with the IMAQ functions.
Hope it helps.
Mike
Similar Messages
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Importing Footage from Camera (Log and Capture)
I am importing footage from my camera onto FC. Now my laptop doesn't have nearly enough space to import all the footage, but I have an external HD with 500 GB which is more than enough. But when I press log and capture, it immediately takes up space on the computer. Is there a way to import the footage directly to the hard drive?
thanks.In Final Cut Pro, go to the menu Final Cut Pro > System Settings.
When the System Settings Pane opens, on the Scratch Disks Tab, you can deselect your system disk and select your external drive as the location for the media you are using. You need to deselect the system drive, not just add your external. When done, click OK. Any media you have already transferred to the system disk will still be available for use in the edit, this will direct FC to use your external as the media storage device from this point forward.
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MtD -
I am trying to include a Mac Mini with a webcam/microphone to call several family iPhones 4S/5 usisng email addresses vice phone numbers so that we can communicate from outside the US via iPhone to the US (Mac Mini) via wi-fi and email addresses. We are using the same email address for the Mac Mini as for Itunes and made new email addresses for each of the iPhones. I cannot receive calls from the iPhones but can call the iPhones from the Mac Mini. what needs to be corrected?
Thanks.
SteveHi Steve,
Thanks for visiting Apple Support Communities.
You may find some useful suggestions in these articles:
FaceTime for Mac: Troubleshooting FaceTime
http://support.apple.com/kb/ts4185
iOS: Troubleshooting FaceTime
http://support.apple.com/kb/ts3367
Have a great day!
Jeremy -
How to do Audio/Vedio streaming between web cams and back end servers?
I want to implement an internet chat application, I mean, I want a front end, which connects a web cam (mic and speaker). So, I can send videos and audios to a back end server (do flash streaming? but I am not sure what good product out there I can use), and also send both A/V to another computer on the internet. In other words, need a front end that sends local a/v from webcam (&mic) to backend and receives remote a/v from backend to webcam (and speaker) + backend streaming server.
Any suggestions of techniques to be used? What back end flash streaming server should I sue? How to acquire A/V from web cam (& mic) and how to send A/V to web cam (&speaker) to play?
Thanks a lot!Front end development:- You can use Flash CS4/CS5 or Flex Builder.
Back-end Programming - Server-side programming is basically done using ActionScript. You can use Flash CS4 , but there is no need for special authoring tool, you can do with even text-editor. After you author, you just need to place files at proper location on FMS.
Front-end runtime - You just need Flash Player installed , basically active-x or plug-in in your browser - which you would already have by now
Also if you decide to write AIR application for your front-end, you will need AIR - which is again free
Hope that answers your questions -
Satellite T210 - web camera is not working - cloud image appears
Hi,
My web camera (it is incorporated on my computer) is not working.
When I turn it on it appears a blue light (informing that it is connected) but it is not taking pictures or videos regardless I am using skype or I am just using the webcam without being on a specific program. Only appears a image with clouds!
Any suggestions?
RegardsUse please option effect in Web camera applications and click on tab called screen cover.
Be sure there is enabled option ON.
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Can you use the ipod nano 5g as a web cam
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No.
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Automatically start FrontCamera and capture image
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Creative Web Cam III Need Help
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JohnHi Leighman,
Please refer to this post. -
HI i have G575 model in that web camera clarity and output sound also poor ..Tty to give solution for this
Hi
Welcome to the community.
As per your concern I would suggest you to please re-install the camera and sound driver from the below mentioned web link.
http://support.lenovo.com/en_US/research/hints-or-tips/detail.page?DocID=HT072969
Also please use the camera in the brighten area.
Afterwards, please restart the system and check if the issue gets resolved.
Regard,
Sameer
Did someone help you today? Press the star on the left to thank them with a Kudo!
If you find a post helpful and it answers your question, please mark it as an "Accepted Solution".! This will help the rest of the Community with similar issues identify the verified solution and benefit from it.
Follow @LenovoForums on Twitter! -
I just purchased a Mac Mini. I HAVE to have a working web cam. I've been reading web cam reviews and I haven't found one that has a Mac driver. It sounds like the performance on Macs are bad. 2 of the reviews are positive. If I understood it right, one guy made some settings changes on his comp. to make it work. I'm new to Macs and can hardly believe that Mackintosh hasn't produced a single portable web cam in all the years they've been in use.
Actually I'm pretty sure that Apple did produce a webcam, tho' it was some years ago. Most USB webcams should work fine. If you HAVE to have one, and know that it will work, then get an Apple Cinema Display or Thunderbolt Display - price tags are pretty hefty tho'!
-
Capture Web Cam image in APEX and Upload into the Database
Overview
By using a flash object, you should be able to interface with a usb web cam connected to the client machine. Their are a couple of open source ones that I know about, but the one I chose to go with is by Taboca Labs and is called CamCanvas. This is released under the MIT license, and it is at version 0.2, so not very mature - but in saying that it seems to do the trick. The next part is to upload a snapshot into the database - in this particular implementation, it is achieved by taking a snapshot, and putting that data into the canvas object. This is a new HTML5 element, so I am not certain what the IE support would be like. Once you have the image into the canvas, you can then use the provided function convertToDataURL() to convert the image into a Base64 encoded string, which you can then use to convert into to a BLOB. There is however one problem with the Base64 string - APEX has a limitation of 32k for and item value, so can't be submitted by normal means, and a workaround (AJAX) has to be implemented.
Part 1. Capturing the Image from the Flash Object into the Canvas element
Set up the Page
Required Files
Download the tarball of the webcam library from: https://github.com/taboca/CamCanvas-API-/tarball/master
Upload the necessary components to your application. (The flash swf file can be got from one of the samples in the Samples folder. In the root of the tarball, there is actually a swf file, but this seems to be a different file than of what is in the samples - so I just stick with the one from the samples)
Page Body
Create a HTML region, and add the following:
<div class="container">
<object id="iembedflash" classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000"
codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,0,0" width="320" height="240">
<param name="movie" value="#APP_IMAGES#camcanvas.swf" />
<param name="quality" value="high" />
<param name="allowScriptAccess" value="always" />
<embed allowScriptAccess="always" id="embedflash" src="#APP_IMAGES#camcanvas.swf" quality="high" width="320" height="240"
type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" mayscript="true" />
</object>
</div>
<p><a href="javascript:captureToCanvas()">Capture</a></p>
<canvas style="border:1px solid yellow" id="canvas" width="320" height="240"></canvas>That will create the webcam container, and an empty canvas element for the captured image to go into.
Also, have a hidden unprotected page item to store the Base64 code into - I called mine P2_IMAGE_BASE64
HTML Header and Body Attribute
Add the Page HTML Body Attribute as:
onload="init(320,240)"
JavaScript
Add the following in the Function and Global Variable Declarations for the page (mostly taken out of the samples provided)
//Camera relations functions
var gCtx = null;
var gCanvas = null;
var imageData = null;
var ii=0;
var jj=0;
var c=0;
function init(ww,hh){
gCanvas = document.getElementById("canvas");
var w = ww;
var h = hh;
gCanvas.style.width = w + "px";
gCanvas.style.height = h + "px";
gCanvas.width = w;
gCanvas.height = h;
gCtx = gCanvas.getContext("2d");
gCtx.clearRect(0, 0, w, h);
imageData = gCtx.getImageData( 0,0,320,240);
function passLine(stringPixels) {
//a = (intVal >> 24) & 0xff;
var coll = stringPixels.split("-");
for(var i=0;i<320;i++) {
var intVal = parseInt(coll);
r = (intVal >> 16) & 0xff;
g = (intVal >> 8) & 0xff;
b = (intVal ) & 0xff;
imageData.data[c+0]=r;
imageData.data[c+1]=g;
imageData.data[c+2]=b;
imageData.data[c+3]=255;
c+=4;
if(c>=320*240*4) {
c=0;
gCtx.putImageData(imageData, 0,0);
function captureToCanvas() {
flash = document.getElementById("embedflash");
flash.ccCapture();
var canvEle = document.getElementById('canvas');
$s('P2_IMAGE_BASE64', canvEle.toDataURL());//Assumes hidden item name is P2_IMAGE_BASE64
clob_Submit();//this is a part of part (AJAX submit value to a collection) two
}In the footer region of the page (which is just a loading image to show whilst the data is being submitted to the collection [hidden by default]) :<img src="#IMAGE_PREFIX#processing3.gif" id="AjaxLoading"
style="display:none;position:absolute;left:45%;top:45%;padding:10px;border:2px solid black;background:#FFF;" />If you give it a quick test, you should be able to see the webcam feed and capture it into the canvas element by clicking the capture link, in between the two elements - it might through a JS error since the clob_Submit() function does not exist yet.
*Part 2. Upload the image into the Database*
As mentioned in the overview, the main limitation is that APEX can't submit values larger than 32k, which I hope the APEX development team will be fixing this limitation in a future release, the workaround isn't really good from a maintainability perspective.
In the sample applications, there is one that demonstrates saving values to the database that are over 32k, which uses an AJAX technique: see http://www.oracle.com/technetwork/developer-tools/apex/application-express/packaged-apps-090453.html#LARGE.
*Required Files*
From the sample application, there is a script you need to upload, and reference in your page. So you can either install the sample application I linked to, or grab the script from the demonstration I have provided - its called apex_save_large.js.
*Create a New Page*
Create a page to Post the large value to (I created mine as 1000), and create the following process, with the condition that Request = SAVE. (All this is in the sample application for saving large values).declare
l_code clob := empty_clob;
begin
dbms_lob.createtemporary( l_code, false, dbms_lob.SESSION );
for i in 1..wwv_flow.g_f01.count loop
dbms_lob.writeappend(l_code,length(wwv_flow.g_f01(i)),wwv_flow.g_f01(i));
end loop;
apex_collection.create_or_truncate_collection(p_collection_name => wc_pkg_globals.g_base64_collection);
apex_collection.add_member(p_collection_name => wc_pkg_globals.g_base64_collection,p_clob001 => l_code);
htmldb_application.g_unrecoverable_error := TRUE;
end;I also created a package for storing the collection name, which is referred to in the process, for the collection name:create or replace
package
wc_pkg_globals
as
g_base64_collection constant varchar2(40) := 'BASE64_IMAGE';
end wc_pkg_globals;That is all that needs to be done for page 1000. You don't use this for anything else, *so go back to edit the camera page*.
*Modify the Function and Global Variable Declarations* (to be able to submit large values.)
The below again assumes the item that you want to submit has an item name of 'P2_IMAGE_BASE64', the condition of the process on the POST page is request = SAVE, and the post page is page 1000. This has been taken srtaight from the sample application for saving large values.//32K Limit workaround functions
function clob_Submit(){
$x_Show('AjaxLoading')
$a_PostClob('P2_IMAGE_BASE64','SAVE','1000',clob_SubmitReturn);
function clob_SubmitReturn(){
if(p.readyState == 4){
$x_Hide('AjaxLoading');
$x('P2_IMAGE_BASE64').value = '';
}else{return false;}
function doSubmit(r){
$x('P2_IMAGE_BASE64').value = ''
flowSelectAll();
document.wwv_flow.p_request.value = r;
document.wwv_flow.submit();
}Also, reference the script that the above code makes use of, in the page header<script type="text/javascript" src="#WORKSPACE_IMAGES#apex_save_large.js"></script>Assuming the script is located in workspace images, and not associated to a specific app. Other wise reference #APP_IMAGES#
*Set up the table to store the images*CREATE TABLE "WC_SNAPSHOT"
"WC_SNAPSHOT_ID" NUMBER NOT NULL ENABLE,
"BINARY" BLOB,
CONSTRAINT "WC_SNAPSHOT_PK" PRIMARY KEY ("WC_SNAPSHOT_ID")
create sequence seq_wc_snapshot start with 1 increment by 1;
CREATE OR REPLACE TRIGGER "BI_WC_SNAPSHOT" BEFORE
INSERT ON WC_SNAPSHOT FOR EACH ROW BEGIN
SELECT seq_wc_snapshot.nextval INTO :NEW.wc_snapshot_id FROM dual;
END;
Then finally, create a page process to save the image:declare
v_image_input CLOB;
v_image_output BLOB;
v_buffer NUMBER := 64;
v_start_index NUMBER := 1;
v_raw_temp raw(64);
begin
--discard the bit of the string we dont need
select substr(clob001, instr(clob001, ',')+1, length(clob001)) into v_image_input
from apex_collections
where collection_name = wc_pkg_globals.g_base64_collection;
dbms_lob.createtemporary(v_image_output, true);
for i in 1..ceil(dbms_lob.getlength(v_image_input)/v_buffer) loop
v_raw_temp := utl_encode.base64_decode(utl_raw.cast_to_raw(dbms_lob.substr(v_image_input, v_buffer, v_start_index)));
dbms_lob.writeappend(v_image_output, utl_raw.length(v_raw_temp),v_raw_temp);
v_start_index := v_start_index + v_buffer;
end loop;
insert into WC_SNAPSHOT (binary) values (v_image_output); commit;
end;Create a save button - add some sort of validation to make sure the hidden item has a value (i.e. image has been captured). Make the above conditional for request = button name so it only runs when you click Save (you probably want to disable this button until the data has been completely submitted to the collection - I haven't done this in the demonstration).
Voila, you should have now be able to capture the image from a webcam. Take a look at the samples from the CamCanvas API for extra effects if you wanted to do something special.
And of course, all the above assumed you want a resolution of 320 x 240 for the image.
Disclaimer: At time of writing, this worked with a logitech something or rather webcam, and is completely untested on IE.
Check out a demo: http://apex.oracle.com/pls/apex/f?p=trents_demos:webcam_i (my image is a bit blocky, but i think its just my webcam. I've seen others that are much more crisp using this) Also, just be sure to wait for the progress bar to dissappear before clicking Save.
Feedback welcomed.Hmm, maybe for some reason you aren't getting the base64 version of the saved image? Is the collection getting the full base64 string? Seems like its not getting any if its no data found.
The javascript console is your friend.
Also, in the example i used an extra page, from what one of the examples on apex packages apps had. But since then, I found this post by Carl: http://carlback.blogspot.com/2008/04/new-stuff-4-over-head-with-clob.html - I would use this technique for submitting the clob, over what I have done - as its less hacky. Just sayin. -
Web-based video capture and detection using web cam
to anyone:
is it possible to capture video and detect motion using a web cam in a web based application?how is it done?
if not possible, what solutions can you suggest so that i can put it on a web based application?
tnx for the help..Ironman wrote:
I'm sure it could be achieved by capturing individual frames, say one every second or so, and then doing a checksum on the image bytes and compare it with the previous frames checksum - if they were different then the frames are different and therefore motion can be assumed. If you don't want to check the entire image you can choose a tile, say in the centre of the picture, and checksum this. I use this technique to detect frozen images if CCTV cameras are causing problems. This other thread may also help :
http://forum.java.sun.com/thread.jspa?threadID=5233760
Wow, now that is good idea. I guess you don't need external hardware to check for movement. Brilliant! -
Capture an image using the web camera from a web application
Hi All,
Could anyone please share the steps what have to be followed for capture an image using the web camera from a web application.
I have a similar requirement like this,
1) Detect the Webcam on the users machine from the web application.(To be more clear when the user clicks on 'Add Photo' tool from the web application)
2) When the user confirms to save, save the Image in users machine at some temporary location with some unique file name.
3) Upload the Image to the server from the temporary location.
Please share the details like, what can be used and how it can be used etc...
Thanks,
Suman1) Detect the Webcam on the users machine from the web application.(To be more clear when the user clicks on 'Add Photo' tool from the web application)There's not really any good way to do this with JMF. You'd have to somehow create a JMF web-start application that will install the native JMF binaries, and then kick off the capture device scanning code from the application, and then scan through the list of devices found to get the MediaLocator of the web cam.
2) When the user confirms to save, save the Image in users machine at some temporary location with some unique file name.You'd probably be displaying a "preview" window and then you'd just want to capture the image. There are a handful of ways you could capture the image, but it really depends on your situation.
3) Upload the Image to the server from the temporary location.You can find out how to do this on google.
All things told, this application is probably more suited to be a FMJ (Freedom for Media in Java) application than a JMF application. JMF relies on native code to capture from the web cams, whereas FMJ does not.
Alternately, you might want to look into Adobe Flex for this particular application. -
Updated : No question, just example web cam capture code
Hi,
I posted this example a while back, but it had some cosmetic bugs in it.
Here's an updated version.
Quick Start
1. Install JMF 2.1.1e (performance pack version)
( see imports list in source code if you really want to run it using the older version 2.1.1c )
2. You have to set the JMF_HOME or JMFHOME environment variable. Can't remember which one.
"Nearly sure" it's JMF_HOME.
3. Connect your camera
4. run jmfinit ( may need to do a few times until it detects your camera )
When it does, you're in business, and you can try to run the code
5. Run java -cp .;%JMF_HOME%\lib\jmf.jar JWebCam
known issue
Under Java 1.5 / 5 - When capturing a frame, and then resizing that snapshots JFrame, the image did not always scale up and display.
That does work under Java 1.3.1_06 .
Tested on Win98 2nd edition, Java 1.3.1_06, and Creative Web Cam Pro.
Legal stuff in plain english : This code is available for use by everyone, personal or commercial, no need to mention me in licenses or anything. It's just a demo I knocked up for myself. So I am under no obligation to support this. Use it at your own risk.... that implies you can't blame or sue me for anything that goes wrong.
If you like the code, I'd be happy to hear whereabouts you are in the world :-)
Also note : this is the limits of my JMF experience at present.
If you've a separate question, post it to a new topic!
regards,
Owen ( Dublin, Ireland )
import javax.swing.*;
import javax.swing.border.*;
import java.io.*;
import javax.media.*;
import javax.media.datasink.*;
import javax.media.format.*;
import javax.media.protocol.*;
import javax.media.util.*;
import javax.media.control.*;
import java.util.*;
import java.awt.*;
import java.awt.image.*;
import java.awt.event.*;
import com.sun.image.codec.jpeg.*;
// import com.sun.media.vfw.VFWCapture; // JMF 2.1.1c version
import com.sun.media.protocol.vfw.VFWCapture; // JMF 2.1.1e version
public class JWebCam extends JFrame
implements WindowListener, ComponentListener
protected final static int MIN_WIDTH = 100; // 320;
protected final static int MIN_HEIGHT = 100; // 240;
protected static int shotCounter = 1;
protected JLabel statusBar = null;
protected JPanel visualContainer = null;
protected Component visualComponent = null;
protected JToolBar toolbar = null;
protected MyToolBarAction formatButton = null;
protected MyToolBarAction captureButton = null;
protected Player player = null;
protected CaptureDeviceInfo webCamDeviceInfo = null;
protected MediaLocator ml = null;
protected Dimension imageSize = null;
protected FormatControl formatControl = null;
protected VideoFormat currentFormat = null;
protected Format[] videoFormats = null;
protected MyVideoFormat[] myFormatList = null;
protected MyCaptureDeviceInfo[] myCaptureDevices = null;
protected boolean initialised = false;
* Constructor
public JWebCam ( String frameTitle )
super ( frameTitle );
try
UIManager.setLookAndFeel("javax.swing.plaf.metal.MetalLookAndFeel");
catch ( Exception cnfe )
System.out.println ("Note : Cannot load look and feel settings");
setSize ( 320, 260 ); // default size...
addWindowListener ( this );
addComponentListener ( this );
getContentPane().setLayout ( new BorderLayout() );
visualContainer = new JPanel();
visualContainer.setLayout ( new BorderLayout() );
getContentPane().add ( visualContainer, BorderLayout.CENTER );
statusBar = new JLabel ("")
// Nasty bug workaround
// The minimum JLabel size was determined by the text in the status bar
// So the layoutmanager wouldn't shrink the window for the video image
public Dimension getPreferredSize ( )
// get the JLabel to "allow" a minimum of 10 pixels width
// not to work out the minimum size from the text length
return ( new Dimension ( 10, super.getPreferredSize().height ) );
statusBar.setBorder ( new EtchedBorder() );
getContentPane().add ( statusBar, BorderLayout.SOUTH );
* Initialise
* @returns true if web cam is detected
public boolean initialise ( )
throws Exception
MyCaptureDeviceInfo[] cams = autoDetect();
if ( cams.length > 0 )
if ( cams.length == 1 )
System.out.println ("Note : 1 web cam detected");
return ( initialise ( cams[0].capDevInfo ) );
else
System.out.println ("Note : " + cams.length + " web cams detected");
Object selected = JOptionPane.showInputDialog (this,
"Select Video format",
"Capture format selection",
JOptionPane.INFORMATION_MESSAGE,
null, // Icon icon,
cams, // videoFormats,
cams[0] );
if ( selected != null )
return ( initialise ( ((MyCaptureDeviceInfo)selected).capDevInfo ) );
else
return ( initialise ( null ) );
else
return ( initialise ( null ) );
* Initialise
* @params _deviceInfo, specific web cam device if not autodetected
* @returns true if web cam is detected
public boolean initialise ( CaptureDeviceInfo _deviceInfo )
throws Exception
statusBar.setText ( "Initialising...");
webCamDeviceInfo = _deviceInfo;
if ( webCamDeviceInfo != null )
statusBar.setText ( "Connecting to : " + webCamDeviceInfo.getName() );
try
setUpToolBar();
getContentPane().add ( toolbar, BorderLayout.NORTH );
ml = webCamDeviceInfo.getLocator();
if ( ml != null )
player = Manager.createRealizedPlayer ( ml );
if ( player != null )
player.start();
formatControl = (FormatControl)player.getControl ( "javax.media.control.FormatControl" );
videoFormats = webCamDeviceInfo.getFormats();
myFormatList = new MyVideoFormat[videoFormats.length];
for ( int i=0; i<videoFormats.length; i++ )
myFormatList[i] = new MyVideoFormat ( (VideoFormat)videoFormats[i] );
Format currFormat = formatControl.getFormat();
visualComponent = player.getVisualComponent();
if ( visualComponent != null )
visualContainer.add ( visualComponent, BorderLayout.CENTER );
if ( currFormat instanceof VideoFormat )
currentFormat = (VideoFormat)currFormat;
imageSize = currentFormat.getSize();
visualContainer.setPreferredSize ( imageSize );
setSize ( imageSize.width, imageSize.height + statusBar.getHeight() + toolbar.getHeight() );
else
System.err.println ("Error : Cannot get current video format");
invalidate();
pack();
return ( true );
else
System.err.println ("Error : Could not get visual component");
return ( false );
else
System.err.println ("Error : Cannot create player");
statusBar.setText ( "Cannot create player" );
return ( false );
else
System.err.println ("Error : No MediaLocator for " + webCamDeviceInfo.getName() );
statusBar.setText ( "No Media Locator for : " + webCamDeviceInfo.getName() );
return ( false );
catch ( IOException ioEx )
System.err.println ("Error connecting to [" + webCamDeviceInfo.getName() + "] : " + ioEx.getMessage() );
statusBar.setText ( "Connecting to : " + webCamDeviceInfo.getName() );
return ( false );
catch ( NoPlayerException npex )
statusBar.setText ("Cannot create player");
return ( false );
catch ( CannotRealizeException nre )
statusBar.setText ( "Cannot realize player");
return ( false );
else
return ( false );
* Dynamically create menu items
* @returns the device info object if found, null otherwise
public void setFormat ( VideoFormat selectedFormat )
if ( formatControl != null )
// player.stop(); // not needed and big performance hit
currentFormat = selectedFormat;
if ( visualComponent != null )
visualContainer.remove ( visualComponent );
imageSize = currentFormat.getSize();
visualContainer.setPreferredSize ( imageSize );
statusBar.setText ( "Format : " + currentFormat );
System.out.println ("Format : " + currentFormat );
formatControl.setFormat ( currentFormat );
// player.start(); // not needed and big performance hit
visualComponent = player.getVisualComponent();
if ( visualComponent != null )
visualContainer.add ( visualComponent, BorderLayout.CENTER );
invalidate(); // let the layout manager work out the sizes
pack();
else
System.out.println ("Visual component not an instance of FormatControl");
statusBar.setText ( "Visual component cannot change format" );
public VideoFormat getFormat ( )
return ( currentFormat );
protected void setUpToolBar ( )
toolbar = new JToolBar();
// Note : due to cosmetic glitches when undocking and docking the toolbar,
// I've set this to false.
toolbar.setFloatable(false);
// Note : If you supply the 16 x 16 bitmaps then you can replace
// the commented line in the MyToolBarAction constructor
formatButton = new MyToolBarAction ( "Resolution", "BtnFormat.jpg" );
captureButton = new MyToolBarAction ( "Capture", "BtnCapture.jpg" );
toolbar.add ( formatButton );
toolbar.add ( captureButton );
getContentPane().add ( toolbar, BorderLayout.NORTH );
protected void toolbarHandler ( MyToolBarAction actionBtn )
if ( actionBtn == formatButton )
Object selected = JOptionPane.showInputDialog (this,
"Select Video format",
"Capture format selection",
JOptionPane.INFORMATION_MESSAGE,
null, // Icon icon,
myFormatList, // videoFormats,
currentFormat );
if ( selected != null )
setFormat ( ((MyVideoFormat)selected).format );
else if ( actionBtn == captureButton )
Image photo = grabFrameImage ( );
if ( photo != null )
MySnapshot snapshot = new MySnapshot ( photo, new Dimension ( imageSize ) );
else
System.err.println ("Error : Could not grab frame");
* autoDetects the first web camera in the system
* searches for video for windows ( vfw ) capture devices
* @returns the device info object if found, null otherwise
public MyCaptureDeviceInfo[] autoDetect ( )
Vector list = CaptureDeviceManager.getDeviceList ( null );
CaptureDeviceInfo devInfo = null;
String name;
Vector capDevices = new Vector();
if ( list != null )
for ( int i=0; i<list.size(); i++ )
devInfo = (CaptureDeviceInfo)list.elementAt ( i );
name = devInfo.getName();
if ( name.startsWith ("vfw:") )
System.out.println ("DeviceManager List : " + name );
capDevices.addElement ( new MyCaptureDeviceInfo ( devInfo ) );
else
for ( int i = 0; i < 10; i++ )
try
name = VFWCapture.capGetDriverDescriptionName ( i );
if (name != null && name.length() > 1)
devInfo = com.sun.media.protocol.vfw.VFWSourceStream.autoDetect ( i );
if ( devInfo != null )
System.out.println ("VFW Autodetect List : " + name );
capDevices.addElement ( new MyCaptureDeviceInfo ( devInfo ) );
catch ( Exception ioEx )
System.err.println ("Error connecting to [" + webCamDeviceInfo.getName() + "] : " + ioEx.getMessage() );
// ignore errors detecting device
statusBar.setText ( "AutoDetect failed : " + ioEx.getMessage() );
MyCaptureDeviceInfo[] detected = new MyCaptureDeviceInfo[ capDevices.size() ];
for ( int i=0; i<capDevices.size(); i++ )
detected[i] = (MyCaptureDeviceInfo)capDevices.elementAt ( i );
return ( detected );
* deviceInfo
* @note outputs text information
public void deviceInfo ( )
if ( webCamDeviceInfo != null )
Format[] formats = webCamDeviceInfo.getFormats();
if ( ( formats != null ) && ( formats.length > 0 ) )
for ( int i=0; i<formats.length; i++ )
Format aFormat = formats;
if ( aFormat instanceof VideoFormat )
Dimension dim = ((VideoFormat)aFormat).getSize();
// System.out.println ("Video Format " + i + " : " + formats[i].getEncoding() + ", " + dim.width + " x " + dim.height );
else
System.out.println ("Error : No web cam detected");
* grabs a frame's buffer from the web cam / device
* @returns A frames buffer
public Buffer grabFrameBuffer ( )
if ( player != null )
FrameGrabbingControl fgc = (FrameGrabbingControl)player.getControl ( "javax.media.control.FrameGrabbingControl" );
if ( fgc != null )
return ( fgc.grabFrame() );
else
System.err.println ("Error : FrameGrabbingControl is null");
return ( null );
else
System.err.println ("Error : Player is null");
return ( null );
* grabs a frame's buffer, as an image, from the web cam / device
* @returns A frames buffer as an image
public Image grabFrameImage ( )
Buffer buffer = grabFrameBuffer();
if ( buffer != null )
// Convert it to an image
BufferToImage btoi = new BufferToImage ( (VideoFormat)buffer.getFormat() );
if ( btoi != null )
Image image = btoi.createImage ( buffer );
if ( image != null )
return ( image );
else
System.err.println ("Error : BufferToImage cannot convert buffer");
return ( null );
else
System.err.println ("Error : cannot create BufferToImage instance");
return ( null );
else
System.out.println ("Error : Buffer grabbed is null");
return ( null );
* Closes and cleans up the player
public void playerClose ( )
if ( player != null )
player.close();
player.deallocate();
player = null;
public void windowClosing ( WindowEvent e )
playerClose();
System.exit ( 1 );
public void componentResized ( ComponentEvent e )
Dimension dim = getSize();
boolean mustResize = false;
if ( dim.width < MIN_WIDTH )
dim.width = MIN_WIDTH;
mustResize = true;
if ( dim.height < MIN_HEIGHT )
dim.height = MIN_HEIGHT;
mustResize = true;
if ( mustResize )
setSize ( dim );
public void windowActivated ( WindowEvent e ) { }
public void windowClosed ( WindowEvent e ) { }
public void windowDeactivated ( WindowEvent e ) { }
public void windowDeiconified ( WindowEvent e ) { }
public void windowIconified ( WindowEvent e ) { }
public void windowOpened ( WindowEvent e ) { }
public void componentHidden(ComponentEvent e) { }
public void componentMoved(ComponentEvent e) { }
public void componentShown(ComponentEvent e) { }
protected void finalize ( ) throws Throwable
playerClose();
super.finalize();
class MyToolBarAction extends AbstractAction
public MyToolBarAction ( String name, String imagefile )
// Note : Use version this if you supply your own toolbar icons
// super ( name, new ImageIcon ( imagefile ) );
super ( name );
public void actionPerformed ( ActionEvent event )
toolbarHandler ( this );
class MyVideoFormat
public VideoFormat format;
public MyVideoFormat ( VideoFormat format )
this.format = format;
public String toString ( )
Dimension dim = format.getSize();
return ( format.getEncoding() + " [ " + dim.width + " x " + dim.height + " ]" );
class MyCaptureDeviceInfo
public CaptureDeviceInfo capDevInfo;
public MyCaptureDeviceInfo ( CaptureDeviceInfo devInfo )
capDevInfo = devInfo;
public String toString ( )
return ( capDevInfo.getName() );
class MySnapshot extends JFrame implements ImageObserver
protected Image photo = null;
protected int shotNumber;
public MySnapshot ( Image grabbedFrame, Dimension imageSize )
super ( );
shotNumber = shotCounter++;
setTitle ( "Photo" + shotNumber );
photo = grabbedFrame;
setDefaultCloseOperation ( WindowConstants.DISPOSE_ON_CLOSE );
int imageHeight = photo.getWidth ( this );
int imageWidth = photo.getHeight ( this );
setSize ( imageSize.width, imageSize.height );
final FileDialog saveDialog = new FileDialog ( this, "Save JPEG", FileDialog.SAVE );
final JFrame thisCopy = this;
saveDialog.setFile ( "Photo" + shotNumber );
addWindowListener ( new WindowAdapter()
public void windowClosing ( WindowEvent e )
saveDialog.show();
String filename = saveDialog.getFile();
if ( filename != null )
if ( saveJPEG ( filename ) )
JOptionPane.showMessageDialog ( thisCopy, "Saved " + filename );
setVisible ( false );
dispose();
else
JOptionPane.showMessageDialog ( thisCopy, "Error saving " + filename );
else
setVisible ( false );
dispose();
setVisible ( true );
public void paint ( Graphics g )
super.paint ( g );
g.drawImage ( photo, 0, 0, getWidth(), getHeight(), Color.black, this );
* Saves an image as a JPEG
* @params the image to save
* @params the filename to save the image as
public boolean saveJPEG ( String filename )
boolean saved = false;
BufferedImage bi = new BufferedImage ( photo.getWidth(null),
photo.getHeight(null),
BufferedImage.TYPE_INT_RGB );
Graphics2D g2 = bi.createGraphics();
g2.drawImage ( photo, null, null );
FileOutputStream out = null;
try
out = new FileOutputStream ( filename );
JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder ( out );
JPEGEncodeParam param = encoder.getDefaultJPEGEncodeParam ( bi );
param.setQuality ( 1.0f, false ); // 100% high quality setting, no compression
encoder.setJPEGEncodeParam ( param );
encoder.encode ( bi );
out.close();
saved = true;
catch ( Exception ex )
System.out.println ("Error saving JPEG : " + ex.getMessage() );
return ( saved );
} // of MySnapshot
public static void main (String[] args )
try
JWebCam myWebCam = new JWebCam ( "Web Cam Capture" );
myWebCam.setVisible ( true );
if ( !myWebCam.initialise() )
System.out.println ("Web Cam not detected / initialised");
catch ( Exception ex )
ex.printStackTrace();Hi,
Here's a working version.
If there are no spaces after the "<" symbol, it thinks it's a HTML tag.
Putting spaces in, stops this.
cheers,
Owen
import javax.swing.*;
import javax.swing.border.*;
import java.io.*;
import javax.media.*;
import javax.media.datasink.*;
import javax.media.format.*;
import javax.media.protocol.*;
import javax.media.util.*;
import javax.media.control.*;
import java.util.*;
import java.awt.*;
import java.awt.image.*;
import java.awt.event.*;
import com.sun.image.codec.jpeg.*;
// import com.sun.media.vfw.VFWCapture; // JMF 2.1.1c version
import com.sun.media.protocol.vfw.VFWCapture; // JMF 2.1.1e version
public class JWebCam extends JFrame
implements WindowListener, ComponentListener
protected final static int MIN_WIDTH = 100; // 320;
protected final static int MIN_HEIGHT = 100; // 240;
protected static int shotCounter = 1;
protected JLabel statusBar = null;
protected JPanel visualContainer = null;
protected Component visualComponent = null;
protected JToolBar toolbar = null;
protected MyToolBarAction formatButton = null;
protected MyToolBarAction captureButton = null;
protected Player player = null;
protected CaptureDeviceInfo webCamDeviceInfo = null;
protected MediaLocator ml = null;
protected Dimension imageSize = null;
protected FormatControl formatControl = null;
protected VideoFormat currentFormat = null;
protected Format[] videoFormats = null;
protected MyVideoFormat[] myFormatList = null;
protected MyCaptureDeviceInfo[] myCaptureDevices = null;
protected boolean initialised = false;
* Constructor
public JWebCam ( String frameTitle )
super ( frameTitle );
try
UIManager.setLookAndFeel("javax.swing.plaf.metal.MetalLookAndFeel");
catch ( Exception cnfe )
System.out.println ("Note : Cannot load look and feel settings");
setSize ( 320, 260 ); // default size...
addWindowListener ( this );
addComponentListener ( this );
getContentPane().setLayout ( new BorderLayout() );
visualContainer = new JPanel();
visualContainer.setLayout ( new BorderLayout() );
getContentPane().add ( visualContainer, BorderLayout.CENTER );
statusBar = new JLabel ("")
// Nasty bug workaround
// The minimum JLabel size was determined by the text in the status bar
// So the layoutmanager wouldn't shrink the window for the video image
public Dimension getPreferredSize ( )
// get the JLabel to "allow" a minimum of 10 pixels width
// not to work out the minimum size from the text length
return ( new Dimension ( 10, super.getPreferredSize().height ) );
statusBar.setBorder ( new EtchedBorder() );
getContentPane().add ( statusBar, BorderLayout.SOUTH );
* Initialise
* @returns true if web cam is detected
public boolean initialise ( )
throws Exception
MyCaptureDeviceInfo[] cams = autoDetect();
if ( cams.length > 0 )
if ( cams.length == 1 )
System.out.println ("Note : 1 web cam detected");
return ( initialise ( cams[0].capDevInfo ) );
else
System.out.println ("Note : " + cams.length + " web cams detected");
Object selected = JOptionPane.showInputDialog (this,
"Select Video format",
"Capture format selection",
JOptionPane.INFORMATION_MESSAGE,
null, // Icon icon,
cams, // videoFormats,
cams[0] );
if ( selected != null )
return ( initialise ( ((MyCaptureDeviceInfo)selected).capDevInfo ) );
else
return ( initialise ( null ) );
else
return ( initialise ( null ) );
* Initialise
* @params _deviceInfo, specific web cam device if not autodetected
* @returns true if web cam is detected
public boolean initialise ( CaptureDeviceInfo _deviceInfo )
throws Exception
statusBar.setText ( "Initialising...");
webCamDeviceInfo = _deviceInfo;
if ( webCamDeviceInfo != null )
statusBar.setText ( "Connecting to : " + webCamDeviceInfo.getName() );
try
setUpToolBar();
getContentPane().add ( toolbar, BorderLayout.NORTH );
ml = webCamDeviceInfo.getLocator();
if ( ml != null )
player = Manager.createRealizedPlayer ( ml );
if ( player != null )
player.start();
formatControl = (FormatControl)player.getControl ( "javax.media.control.FormatControl" );
videoFormats = webCamDeviceInfo.getFormats();
myFormatList = new MyVideoFormat[videoFormats.length];
for ( int i=0; i < videoFormats.length; i++ )
myFormatList[i] = new MyVideoFormat ( (VideoFormat)videoFormats[i] );
Format currFormat = formatControl.getFormat();
visualComponent = player.getVisualComponent();
if ( visualComponent != null )
visualContainer.add ( visualComponent, BorderLayout.CENTER );
if ( currFormat instanceof VideoFormat )
currentFormat = (VideoFormat)currFormat;
imageSize = currentFormat.getSize();
visualContainer.setPreferredSize ( imageSize );
setSize ( imageSize.width, imageSize.height + statusBar.getHeight() + toolbar.getHeight() );
else
System.err.println ("Error : Cannot get current video format");
invalidate();
pack();
return ( true );
else
System.err.println ("Error : Could not get visual component");
return ( false );
else
System.err.println ("Error : Cannot create player");
statusBar.setText ( "Cannot create player" );
return ( false );
else
System.err.println ("Error : No MediaLocator for " + webCamDeviceInfo.getName() );
statusBar.setText ( "No Media Locator for : " + webCamDeviceInfo.getName() );
return ( false );
catch ( IOException ioEx )
System.err.println ("Error connecting to [" + webCamDeviceInfo.getName() + "] : " + ioEx.getMessage() );
statusBar.setText ( "Connecting to : " + webCamDeviceInfo.getName() );
return ( false );
catch ( NoPlayerException npex )
statusBar.setText ("Cannot create player");
return ( false );
catch ( CannotRealizeException nre )
statusBar.setText ( "Cannot realize player");
return ( false );
else
return ( false );
* Dynamically create menu items
* @returns the device info object if found, null otherwise
public void setFormat ( VideoFormat selectedFormat )
if ( formatControl != null )
player.stop();
currentFormat = selectedFormat;
if ( visualComponent != null )
visualContainer.remove ( visualComponent );
imageSize = currentFormat.getSize();
visualContainer.setPreferredSize ( imageSize );
statusBar.setText ( "Format : " + currentFormat );
System.out.println ("Format : " + currentFormat );
formatControl.setFormat ( currentFormat );
player.start();
visualComponent = player.getVisualComponent();
if ( visualComponent != null )
visualContainer.add ( visualComponent, BorderLayout.CENTER );
invalidate(); // let the layout manager work out the sizes
pack();
else
System.out.println ("Visual component not an instance of FormatControl");
statusBar.setText ( "Visual component cannot change format" );
public VideoFormat getFormat ( )
return ( currentFormat );
protected void setUpToolBar ( )
toolbar = new JToolBar();
// Note : due to cosmetic glitches when undocking and docking the toolbar,
// I've set this to false.
toolbar.setFloatable(false);
// Note : If you supply the 16 x 16 bitmaps then you can replace
// the commented line in the MyToolBarAction constructor
formatButton = new MyToolBarAction ( "Resolution", "BtnFormat.jpg" );
captureButton = new MyToolBarAction ( "Capture", "BtnCapture.jpg" );
toolbar.add ( formatButton );
toolbar.add ( captureButton );
getContentPane().add ( toolbar, BorderLayout.NORTH );
protected void toolbarHandler ( MyToolBarAction actionBtn )
if ( actionBtn == formatButton )
Object selected = JOptionPane.showInputDialog (this,
"Select Video format",
"Capture format selection",
JOptionPane.INFORMATION_MESSAGE,
null, // Icon icon,
myFormatList, // videoFormats,
currentFormat );
if ( selected != null )
setFormat ( ((MyVideoFormat)selected).format );
else if ( actionBtn == captureButton )
Image photo = grabFrameImage ( );
if ( photo != null )
MySnapshot snapshot = new MySnapshot ( photo, new Dimension ( imageSize ) );
else
System.err.println ("Error : Could not grab frame");
* autoDetects the first web camera in the system
* searches for video for windows ( vfw ) capture devices
* @returns the device info object if found, null otherwise
public MyCaptureDeviceInfo[] autoDetect ( )
Vector list = CaptureDeviceManager.getDeviceList ( null );
CaptureDeviceInfo devInfo = null;
String name;
Vector capDevices = new Vector();
if ( list != null )
for ( int i=0; i < list.size(); i++ )
devInfo = (CaptureDeviceInfo)list.elementAt ( i );
name = devInfo.getName();
if ( name.startsWith ("vfw:") )
System.out.println ("DeviceManager List : " + name );
capDevices.addElement ( new MyCaptureDeviceInfo ( devInfo ) );
else
for ( int i = 0; i < 10; i++ )
try
name = VFWCapture.capGetDriverDescriptionName ( i );
if (name != null && name.length() > 1)
devInfo = com.sun.media.protocol.vfw.VFWSourceStream.autoDetect ( i );
if ( devInfo != null )
System.out.println ("VFW Autodetect List : " + name );
capDevices.addElement ( new MyCaptureDeviceInfo ( devInfo ) );
catch ( Exception ioEx )
System.err.println ("Error connecting to [" + webCamDeviceInfo.getName() + "] : " + ioEx.getMessage() );
// ignore errors detecting device
statusBar.setText ( "AutoDetect failed : " + ioEx.getMessage() );
MyCaptureDeviceInfo[] detected = new MyCaptureDeviceInfo[ capDevices.size() ];
for ( int i=0; i < capDevices.size(); i++ )
detected[i] = (MyCaptureDeviceInfo)capDevices.elementAt ( i );
return ( detected );
* deviceInfo
* @note outputs text information
public void deviceInfo ( )
if ( webCamDeviceInfo != null )
Format[] formats = webCamDeviceInfo.getFormats();
if ( ( formats != null ) && ( formats.length > 0 ) )
for ( int i=0; i < formats.length; i++ )
Format aFormat = formats;
if ( aFormat instanceof VideoFormat )
Dimension dim = ((VideoFormat)aFormat).getSize();
// System.out.println ("Video Format " + i + " : " + formats[i].getEncoding() + ", " + dim.width + " x " + dim.height );
else
System.out.println ("Error : No web cam detected");
* grabs a frame's buffer from the web cam / device
* @returns A frames buffer
public Buffer grabFrameBuffer ( )
if ( player != null )
FrameGrabbingControl fgc = (FrameGrabbingControl)player.getControl ( "javax.media.control.FrameGrabbingControl" );
if ( fgc != null )
return ( fgc.grabFrame() );
else
System.err.println ("Error : FrameGrabbingControl is null");
return ( null );
else
System.err.println ("Error : Player is null");
return ( null );
* grabs a frame's buffer, as an image, from the web cam / device
* @returns A frames buffer as an image
public Image grabFrameImage ( )
Buffer buffer = grabFrameBuffer();
if ( buffer != null )
// Convert it to an image
BufferToImage btoi = new BufferToImage ( (VideoFormat)buffer.getFormat() );
if ( btoi != null )
Image image = btoi.createImage ( buffer );
if ( image != null )
return ( image );
else
System.err.println ("Error : BufferToImage cannot convert buffer");
return ( null );
else
System.err.println ("Error : cannot create BufferToImage instance");
return ( null );
else
System.out.println ("Error : Buffer grabbed is null");
return ( null );
* Closes and cleans up the player
public void playerClose ( )
if ( player != null )
player.close();
player.deallocate();
player = null;
public void windowClosing ( WindowEvent e )
playerClose();
System.exit ( 1 );
public void componentResized ( ComponentEvent e )
Dimension dim = getSize();
boolean mustResize = false;
if ( dim.width < MIN_WIDTH )
dim.width = MIN_WIDTH;
mustResize = true;
if ( dim.height < MIN_HEIGHT )
dim.height = MIN_HEIGHT;
mustResize = true;
if ( mustResize )
setSize ( dim );
public void windowActivated ( WindowEvent e ) { }
public void windowClosed ( WindowEvent e ) { }
public void windowDeactivated ( WindowEvent e ) { }
public void windowDeiconified ( WindowEvent e ) { }
public void windowIconified ( WindowEvent e ) { }
public void windowOpened ( WindowEvent e ) { }
public void componentHidden(ComponentEvent e) { }
public void componentMoved(ComponentEvent e) { }
public void componentShown(ComponentEvent e) { }
protected void finalize ( ) throws Throwable
playerClose();
super.finalize();
class MyToolBarAction extends AbstractAction
public MyToolBarAction ( String name, String imagefile )
// Note : Use version this if you supply your own toolbar icons
// super ( name, new ImageIcon ( imagefile ) );
super ( name );
public void actionPerformed ( ActionEvent event )
toolbarHandler ( this );
class MyVideoFormat
public VideoFormat format;
public MyVideoFormat ( VideoFormat format )
this.format = format;
public String toString ( )
Dimension dim = format.getSize();
return ( format.getEncoding() + " [ " + dim.width + " x " + dim.height + " ]" );
class MyCaptureDeviceInfo
public CaptureDeviceInfo capDevInfo;
public MyCaptureDeviceInfo ( CaptureDeviceInfo devInfo )
capDevInfo = devInfo;
public String toString ( )
return ( capDevInfo.getName() );
class MySnapshot extends JFrame implements ImageObserver
protected Image photo = null;
protected int shotNumber;
public MySnapshot ( Image grabbedFrame, Dimension imageSize )
super ( );
shotNumber = shotCounter++;
setTitle ( "Photo" + shotNumber );
photo = grabbedFrame;
setDefaultCloseOperation ( WindowConstants.DISPOSE_ON_CLOSE );
int imageHeight = photo.getWidth ( this );
int imageWidth = photo.getHeight ( this );
setSize ( imageSize.width, imageSize.height );
final FileDialog saveDialog = new FileDialog ( this, "Save JPEG", FileDialog.SAVE );
final JFrame thisCopy = this;
saveDialog.setFile ( "Photo" + shotNumber );
addWindowListener ( new WindowAdapter()
public void windowClosing ( WindowEvent e )
saveDialog.show();
String filename = saveDialog.getFile();
if ( filename != null )
if ( saveJPEG ( filename ) )
JOptionPane.showMessageDialog ( thisCopy, "Saved " + filename );
setVisible ( false );
dispose();
else
JOptionPane.showMessageDialog ( thisCopy, "Error saving " + filename );
else
setVisible ( false );
dispose();
setVisible ( true );
public void paint ( Graphics g )
super.paint ( g );
g.drawImage ( photo, 0, 0, getWidth(), getHeight(), Color.black, this );
* Saves an image as a JPEG
* @params the image to save
* @params the filename to save the image as
public boolean saveJPEG ( String filename )
boolean saved = false;
BufferedImage bi = new BufferedImage ( photo.getWidth(null),
photo.getHeight(null),
BufferedImage.TYPE_INT_RGB );
Graphics2D g2 = bi.createGraphics();
g2.drawImage ( photo, null, null );
FileOutputStream out = null;
try
out = new FileOutputStream ( filename );
JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder ( out );
JPEGEncodeParam param = encoder.getDefaultJPEGEncodeParam ( bi );
param.setQuality ( 1.0f, false ); // 100% high quality setting, no compression
encoder.setJPEGEncodeParam ( param );
encoder.encode ( bi );
out.close();
saved = true;
catch ( Exception ex )
System.out.println ("Error saving JPEG : " + ex.getMessage() );
return ( saved );
} // of MySnapshot
public static void main (String[] args )
try
JWebCam myWebCam = new JWebCam ( "Web Cam Capture" );
myWebCam.setVisible ( true );
if ( !myWebCam.initialise() )
System.out.println ("Web Cam not detected / initialised");
catch ( Exception ex )
ex.printStackTrace(); -
No Question, just example web cam capture code
Hi,
Since loads of people ask for an example of capturing pics from a web cam, here's one that captures pics, lets you take snapshots, which it displays in another frame. When you shut down the frame it asks if you want to save it to a JPEG.
I'm mainly posting this to spite Eka_Kupkova, who only visits this forum to shamelessly advertise a commercial Twain based package in every single posting on this forum which mentions web cams.
Notes : ( Could be more, read the install docs for JMF )
1. you must download the "performance" version of jmf to capture video.
2. I "think" you need to setup the JMF_HOME environment variable
3. Run the jmfinit program to detect your camera and register it.
I had to run it a couple of times before it worked.
4. I had 2 icons for my toolbar, BtnFormat.jpg and BtnCapture.jpg.
They were just 16 x 16 pixel bitmaps, you can make them up yourself.
5. I assume you've got the webcam working and the driver installed already.
Ps. if you find this useful, then reply back with where you are in the world. I'm in Dublin, Ireland.
cheers,
Owen
import javax.swing.*;
import javax.swing.border.*;
import java.io.*;
import javax.media.*;
import javax.media.format.*;
import javax.media.util.*;
import javax.media.control.*;
import java.util.*;
import java.awt.*;
import java.awt.image.*;
import java.awt.event.*;
import com.sun.image.codec.jpeg.*;
// Ps. I think JMF 2.1.1c used a different package for this class..
import com.sun.media.vfw.VFWCapture;
public class JWebCam extends JFrame
implements WindowListener,
ComponentListener
protected final static int MIN_WIDTH = 320;
protected final static int MIN_HEIGHT = 240;
protected static int shotCounter = 1;
protected JLabel statusBar = null;
protected Component visualComponent = null;
protected JToolBar toolbar = null;
protected MyToolBarAction formatButton = null;
protected MyToolBarAction captureButton = null;
protected Player player = null;
protected CaptureDeviceInfo webCamDeviceInfo = null;
protected MediaLocator ml = null;
protected Dimension imageSize = null;
protected FormatControl formatControl = null;
protected VideoFormat currentFormat = null;
protected Format[] videoFormats = null;
protected MyVideoFormat[] myFormatList = null;
* Constructor
public JWebCam ( String frameTitle )
super ( frameTitle );
try
UIManager.setLookAndFeel("javax.swing.plaf.metal.MetalLookAndFeel");
catch ( Exception cnfe )
System.out.println ("Note : Cannot load look and feel settings");
addWindowListener ( this );
addComponentListener ( this );
getContentPane().setLayout ( new BorderLayout() );
statusBar = new JLabel ("Initialising...");
statusBar.setBorder ( new EtchedBorder() );
getContentPane().add ( statusBar, BorderLayout.SOUTH );
setSize ( 320, 260 ); // default size...
setVisible ( true );
* Initialise
* @returns true if web cam is detected
public boolean initialise ( )
throws Exception
return ( initialise ( autoDetect() ) );
* Initialise
* @params _deviceInfo, specific web cam device if not autodetected
* @returns true if web cam is detected
public boolean initialise ( CaptureDeviceInfo _deviceInfo )
throws Exception
webCamDeviceInfo = _deviceInfo;
if ( webCamDeviceInfo != null )
statusBar.setText ( "Connecting to : " + webCamDeviceInfo.getName() );
try
// setUpMenu ( );
setUpToolBar();
getContentPane().add ( toolbar, BorderLayout.NORTH );
ml = webCamDeviceInfo.getLocator();
if ( ml != null )
player = Manager.createRealizedPlayer ( ml );
if ( player != null )
formatControl = (FormatControl)player.getControl ( "javax.media.control.FormatControl" );
videoFormats = webCamDeviceInfo.getFormats();
setFormat ( (VideoFormat)videoFormats[0] );
// player.start();
visualComponent = player.getVisualComponent();
getContentPane().add ( visualComponent, BorderLayout.CENTER );
invalidate();
pack();
setSize ( imageSize.width, imageSize.height + statusBar.getHeight() + toolbar.getHeight() );
myFormatList = new MyVideoFormat[videoFormats.length];
for ( int i=0; i<videoFormats.length; i++ )
myFormatList[i] = new MyVideoFormat ( (VideoFormat)videoFormats[i] );
else
statusBar.setText ( "No Media Locator for : " + webCamDeviceInfo.getName() );
return ( true );
catch ( IOException ioEx )
statusBar.setText ( "Connecting to : " + webCamDeviceInfo.getName() );
return ( false );
catch ( NoPlayerException npex )
statusBar.setText ("Cannot create player");
return ( false );
catch ( CannotRealizeException nre )
statusBar.setText ( "Cannot realize player");
return ( false );
else
return ( false );
* Dynamically create menu items
* @returns the device info object if found, null otherwise
public void setFormat ( VideoFormat selectedFormat )
if ( formatControl != null )
player.stop();
statusBar.setText ( "Format : " + selectedFormat );
imageSize = selectedFormat.getSize();
formatControl.setFormat ( selectedFormat );
currentFormat = selectedFormat;
setSize ( imageSize.width, imageSize.height + statusBar.getHeight() + toolbar.getHeight() );
player.start();
else
System.out.println ("Visual component not an instance of FormatControl");
statusBar.setText ( "Visual component cannot change format" );
protected void setUpToolBar ( )
toolbar = new JToolBar();
formatButton = new MyToolBarAction ( "Format", "BtnFormat.jpg" );
captureButton = new MyToolBarAction ( "Capture", "BtnCapture.jpg" );
if ( formatButton != null )
toolbar.add ( formatButton );
toolbar.add ( captureButton );
getContentPane().add ( toolbar, BorderLayout.NORTH );
protected void toolbarHandler ( MyToolBarAction actionBtn )
if ( actionBtn == formatButton )
// JOptionPane.showConfirmDialog ( this, "Format Dialog" );
Object selected = JOptionPane.showInputDialog (this,
"Select Video format",
"Capture format selection",
JOptionPane.INFORMATION_MESSAGE,
null, // Icon icon,
myFormatList, // videoFormats,
currentFormat );
if ( selected != null )
setFormat ( ((MyVideoFormat)selected).format );
else if ( actionBtn == captureButton )
Image photo = grabFrameImage ( );
MySnapshot snapshot = new MySnapshot ( photo, new Dimension ( imageSize ) );
* autoDetects the first web camera in the system
* @returns the device info object if found, null otherwise
public CaptureDeviceInfo autoDetect ( )
Vector list = CaptureDeviceManager.getDeviceList ( null );
CaptureDeviceInfo devInfo = null;
if ( list != null )
String name;
for ( int i=0; i<list.size(); i++ )
devInfo = (CaptureDeviceInfo)list.elementAt ( i );
name = devInfo.getName();
if ( name.startsWith ("vfw:") )
break;
if ( devInfo != null && devInfo.getName().startsWith("vfw:") )
return ( devInfo );
else
for ( int i = 0; i < 10; i++ )
try
name = VFWCapture.capGetDriverDescriptionName ( i );
if (name != null && name.length() > 1)
devInfo = com.sun.media.protocol.vfw.VFWSourceStream.autoDetect ( i );
if ( devInfo != null )
return ( devInfo );
catch ( Exception ioEx )
// ignore errors detecting device
statusBar.setText ( "AutoDetect failed : " + ioEx.getMessage() );
return ( null );
else
return ( null );
* deviceInfo
* @note outputs text information
public void deviceInfo ( )
if ( webCamDeviceInfo != null )
Format[] formats = webCamDeviceInfo.getFormats();
if ( ( formats != null ) && ( formats.length > 0 ) )
for ( int i=0; i<formats.length; i++ )
Format aFormat = formats;
if ( aFormat instanceof VideoFormat )
Dimension dim = ((VideoFormat)aFormat).getSize();
System.out.println ("Video Format " + i + " : " + formats[i].getEncoding() + ", " + dim.width + " x " + dim.height );
else
System.out.println ("Format " + i + " : " + formats[i].getEncoding() );
else
System.out.println ("Error : No web cam detected");
* grabs a frame's buffer from the web cam / device
* @returns A frames buffer
public Buffer grabFrameBuffer ( )
if ( player != null )
FrameGrabbingControl fgc = (FrameGrabbingControl)player.getControl ( "javax.media.control.FrameGrabbingControl" );
Buffer buf = fgc.grabFrame();
return ( buf );
else
return ( null );
* grabs a frame's buffer, as an image, from the web cam / device
* @returns A frames buffer as an image
public Image grabFrameImage ( )
Buffer buffer = grabFrameBuffer();
if ( buffer != null )
// Convert it to an image
BufferToImage btoi = new BufferToImage ( (VideoFormat)buffer.getFormat() );
Image image = btoi.createImage ( buffer );
return ( image );
else
System.out.println ("Error : Buffer grabbed is null");
return ( null );
* Closes and cleans up the player
public void playerClose ( )
if ( player != null )
player.close();
player.deallocate();
player = null;
public void windowClosing ( WindowEvent e )
playerClose();
System.exit ( 1 );
public void componentResized(ComponentEvent e)
Dimension dim = getSize();
boolean mustResize = false;
if ( dim.width < MIN_WIDTH )
dim.width = MIN_WIDTH;
mustResize = true;
if ( dim.height < MIN_HEIGHT )
dim.height = MIN_HEIGHT;
mustResize = true;
if ( mustResize )
setSize ( dim );
public void windowActivated ( WindowEvent e ) { }
public void windowClosed ( WindowEvent e ) { }
public void windowDeactivated ( WindowEvent e ) { }
public void windowDeiconified ( WindowEvent e ) { }
public void windowIconified ( WindowEvent e ) { }
public void windowOpened ( WindowEvent e ) { }
public void componentHidden(ComponentEvent e) { }
public void componentMoved(ComponentEvent e) { }
public void componentShown(ComponentEvent e) { }
protected void finalize ( ) throws Throwable
playerClose();
super.finalize();
class MyToolBarAction extends AbstractAction
public MyToolBarAction ( String name, String imagefile )
super ( name, new ImageIcon ( imagefile ) );
public void actionPerformed ( ActionEvent event )
toolbarHandler ( this );
class MyVideoFormat
public VideoFormat format;
public MyVideoFormat ( VideoFormat _format )
format = _format;
public String toString ( )
Dimension dim = format.getSize();
return ( format.getEncoding() + " [ " + dim.width + " x " + dim.height + " ]" );
class MySnapshot extends JFrame
protected Image photo = null;
protected int shotNumber;
public MySnapshot ( Image grabbedFrame, Dimension imageSize )
super ( );
shotNumber = shotCounter++;
setTitle ( "Photo" + shotNumber );
photo = grabbedFrame;
setDefaultCloseOperation ( WindowConstants.DO_NOTHING_ON_CLOSE );
int imageHeight = photo.getWidth ( this );
int imageWidth = photo.getHeight ( this );
setSize ( imageSize.width, imageSize.height );
final FileDialog saveDialog = new FileDialog ( this, "Save JPEG", FileDialog.SAVE );
final JFrame thisCopy = this;
saveDialog.setFile ( "Photo" + shotNumber );
addWindowListener ( new WindowAdapter()
public void windowClosing ( WindowEvent e )
saveDialog.show();
String filename = saveDialog.getFile();
if ( filename != null )
if ( saveJPEG ( filename ) )
JOptionPane.showMessageDialog ( thisCopy, "Saved " + filename );
setVisible ( false );
dispose();
else
JOptionPane.showMessageDialog ( thisCopy, "Error saving " + filename );
else
setVisible ( false );
dispose();
setVisible ( true );
public void paint ( Graphics g )
g.drawImage ( photo, 0, 0, getWidth(), getHeight(), this );
* Saves an image as a JPEG
* @params the image to save
* @params the filename to save the image as
public boolean saveJPEG ( String filename )
boolean saved = false;
BufferedImage bi = new BufferedImage ( photo.getWidth(null),
photo.getHeight(null),
BufferedImage.TYPE_INT_RGB );
Graphics2D g2 = bi.createGraphics();
g2.drawImage ( photo, null, null );
FileOutputStream out = null;
try
out = new FileOutputStream ( filename );
JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder ( out );
JPEGEncodeParam param = encoder.getDefaultJPEGEncodeParam ( bi );
param.setQuality ( 1.0f, false );
encoder.setJPEGEncodeParam ( param );
encoder.encode ( bi );
out.close();
saved = true;
catch ( Exception ex )
System.out.println ("Error saving JPEG : " + ex.getMessage() );
return ( saved );
} // of MySnapshot
public static void main (String[] args )
try
JWebCam myWebCam = new JWebCam ( "TimeSlice Web Cam Capture" );
if ( myWebCam.initialise() )
// myWebCam.deviceInfo(); // outputs device info
else
System.out.println ("Web Cam not detected / initialised");
catch ( Exception ex )
ex.printStackTrace();Doohhh... I posted an old version which didn't work.
I tried and tested this last night, and it runs grand using Ver 2.1.1e.
Tested under Windows 98, using an old Creative GO Camera.
Haven't tried it under Linux, but suspect you'd have to at least change an references to "vfw" to "v4l".
You'll need jmf.jar in your classpath to run it too.
cheers,
Owen
import javax.swing.*;
import javax.swing.border.*;
import java.io.*;
import javax.media.*;
import javax.media.datasink.*;
import javax.media.format.*;
import javax.media.protocol.*;
import javax.media.util.*;
import javax.media.control.*;
import java.util.*;
import java.awt.*;
import java.awt.image.*;
import java.awt.event.*;
import com.sun.image.codec.jpeg.*;
// import com.sun.media.vfw.VFWCapture; // JMF 2.1.1c version
import com.sun.media.protocol.vfw.VFWCapture; // JMF 2.1.1e version
public class JWebCam extends JFrame
implements WindowListener, ComponentListener
protected final static int MIN_WIDTH = 320;
protected final static int MIN_HEIGHT = 240;
protected static int shotCounter = 1;
protected JLabel statusBar = null;
protected JPanel visualContainer = null;
protected Component visualComponent = null;
protected JToolBar toolbar = null;
protected MyToolBarAction formatButton = null;
protected MyToolBarAction captureButton = null;
protected Player player = null;
protected CaptureDeviceInfo webCamDeviceInfo = null;
protected MediaLocator ml = null;
protected Dimension imageSize = null;
protected FormatControl formatControl = null;
protected VideoFormat currentFormat = null;
protected Format[] videoFormats = null;
protected MyVideoFormat[] myFormatList = null;
protected boolean initialised = false;
* Constructor
public JWebCam ( String frameTitle )
super ( frameTitle );
try
UIManager.setLookAndFeel("javax.swing.plaf.metal.MetalLookAndFeel");
catch ( Exception cnfe )
System.out.println ("Note : Cannot load look and feel settings");
setSize ( 320, 260 ); // default size...
addWindowListener ( this );
addComponentListener ( this );
getContentPane().setLayout ( new BorderLayout() );
visualContainer = new JPanel();
visualContainer.setLayout ( new BorderLayout() );
getContentPane().add ( visualContainer, BorderLayout.CENTER );
statusBar = new JLabel ("");
statusBar.setBorder ( new EtchedBorder() );
getContentPane().add ( statusBar, BorderLayout.SOUTH );
* Initialise
* @returns true if web cam is detected
public boolean initialise ( )
throws Exception
return ( initialise ( autoDetect() ) );
* Initialise
* @params _deviceInfo, specific web cam device if not autodetected
* @returns true if web cam is detected
public boolean initialise ( CaptureDeviceInfo _deviceInfo )
throws Exception
statusBar.setText ( "Initialising...");
webCamDeviceInfo = _deviceInfo;
if ( webCamDeviceInfo != null )
statusBar.setText ( "Connecting to : " + webCamDeviceInfo.getName() );
try
setUpToolBar();
getContentPane().add ( toolbar, BorderLayout.NORTH );
ml = webCamDeviceInfo.getLocator();
if ( ml != null )
player = Manager.createRealizedPlayer ( ml );
if ( player != null )
player.start();
formatControl = (FormatControl)player.getControl ( "javax.media.control.FormatControl" );
videoFormats = webCamDeviceInfo.getFormats();
visualComponent = player.getVisualComponent();
if ( visualComponent != null )
visualContainer.add ( visualComponent, BorderLayout.CENTER );
myFormatList = new MyVideoFormat[videoFormats.length];
for ( int i=0; i<videoFormats.length; i++ )
myFormatList[i] = new MyVideoFormat ( (VideoFormat)videoFormats[i] );
Format currFormat = formatControl.getFormat();
if ( currFormat instanceof VideoFormat )
currentFormat = (VideoFormat)currFormat;
imageSize = currentFormat.getSize();
visualContainer.setPreferredSize ( imageSize );
setSize ( imageSize.width, imageSize.height + statusBar.getHeight() + toolbar.getHeight() );
else
System.err.println ("Error : Cannot get current video format");
invalidate();
pack();
return ( true );
else
System.err.println ("Error : Could not get visual component");
return ( false );
else
System.err.println ("Error : Cannot create player");
statusBar.setText ( "Cannot create player" );
return ( false );
else
System.err.println ("Error : No MediaLocator for " + webCamDeviceInfo.getName() );
statusBar.setText ( "No Media Locator for : " + webCamDeviceInfo.getName() );
return ( false );
catch ( IOException ioEx )
statusBar.setText ( "Connecting to : " + webCamDeviceInfo.getName() );
return ( false );
catch ( NoPlayerException npex )
statusBar.setText ("Cannot create player");
return ( false );
catch ( CannotRealizeException nre )
statusBar.setText ( "Cannot realize player");
return ( false );
else
return ( false );
* Dynamically create menu items
* @returns the device info object if found, null otherwise
public void setFormat ( VideoFormat selectedFormat )
if ( formatControl != null )
player.stop();
imageSize = selectedFormat.getSize();
formatControl.setFormat ( selectedFormat );
player.start();
statusBar.setText ( "Format : " + selectedFormat );
currentFormat = selectedFormat;
visualContainer.setPreferredSize ( currentFormat.getSize() );
setSize ( imageSize.width, imageSize.height + statusBar.getHeight() + toolbar.getHeight() );
else
System.out.println ("Visual component not an instance of FormatControl");
statusBar.setText ( "Visual component cannot change format" );
public VideoFormat getFormat ( )
return ( currentFormat );
protected void setUpToolBar ( )
toolbar = new JToolBar();
// Note : If you supply the 16 x 16 bitmaps then you can replace
// the commented line in the MyToolBarAction constructor
formatButton = new MyToolBarAction ( "Resolution", "BtnFormat.jpg" );
captureButton = new MyToolBarAction ( "Capture", "BtnCapture.jpg" );
toolbar.add ( formatButton );
toolbar.add ( captureButton );
getContentPane().add ( toolbar, BorderLayout.NORTH );
protected void toolbarHandler ( MyToolBarAction actionBtn )
if ( actionBtn == formatButton )
Object selected = JOptionPane.showInputDialog (this,
"Select Video format",
"Capture format selection",
JOptionPane.INFORMATION_MESSAGE,
null, // Icon icon,
myFormatList, // videoFormats,
currentFormat );
if ( selected != null )
setFormat ( ((MyVideoFormat)selected).format );
else if ( actionBtn == captureButton )
Image photo = grabFrameImage ( );
if ( photo != null )
MySnapshot snapshot = new MySnapshot ( photo, new Dimension ( imageSize ) );
else
System.err.println ("Error : Could not grab frame");
* autoDetects the first web camera in the system
* searches for video for windows ( vfw ) capture devices
* @returns the device info object if found, null otherwise
public CaptureDeviceInfo autoDetect ( )
Vector list = CaptureDeviceManager.getDeviceList ( null );
CaptureDeviceInfo devInfo = null;
if ( list != null )
String name;
for ( int i=0; i<list.size(); i++ )
devInfo = (CaptureDeviceInfo)list.elementAt ( i );
name = devInfo.getName();
if ( name.startsWith ("vfw:") )
break;
if ( devInfo != null && devInfo.getName().startsWith("vfw:") )
return ( devInfo );
else
for ( int i = 0; i < 10; i++ )
try
name = VFWCapture.capGetDriverDescriptionName ( i );
if (name != null && name.length() > 1)
devInfo = com.sun.media.protocol.vfw.VFWSourceStream.autoDetect ( i );
if ( devInfo != null )
return ( devInfo );
catch ( Exception ioEx )
// ignore errors detecting device
statusBar.setText ( "AutoDetect failed : " + ioEx.getMessage() );
return ( null );
else
return ( null );
* deviceInfo
* @note outputs text information
public void deviceInfo ( )
if ( webCamDeviceInfo != null )
Format[] formats = webCamDeviceInfo.getFormats();
if ( ( formats != null ) && ( formats.length > 0 ) )
for ( int i=0; i<formats.length; i++ )
Format aFormat = formats;
if ( aFormat instanceof VideoFormat )
Dimension dim = ((VideoFormat)aFormat).getSize();
// System.out.println ("Video Format " + i + " : " + formats[i].getEncoding() + ", " + dim.width + " x " + dim.height );
else
System.out.println ("Error : No web cam detected");
* grabs a frame's buffer from the web cam / device
* @returns A frames buffer
public Buffer grabFrameBuffer ( )
if ( player != null )
FrameGrabbingControl fgc = (FrameGrabbingControl)player.getControl ( "javax.media.control.FrameGrabbingControl" );
if ( fgc != null )
return ( fgc.grabFrame(); );
else
System.err.println ("Error : FrameGrabbingControl is null");
return ( null );
else
System.err.println ("Error : Player is null");
return ( null );
* grabs a frame's buffer, as an image, from the web cam / device
* @returns A frames buffer as an image
public Image grabFrameImage ( )
Buffer buffer = grabFrameBuffer();
if ( buffer != null )
// Convert it to an image
BufferToImage btoi = new BufferToImage ( (VideoFormat)buffer.getFormat() );
if ( btoi != null )
Image image = btoi.createImage ( buffer );
if ( image != null )
return ( image );
else
System.err.println ("Error : BufferToImage cannot convert buffer");
return ( null );
else
System.err.println ("Error : cannot create BufferToImage instance");
return ( null );
else
System.out.println ("Error : Buffer grabbed is null");
return ( null );
* Closes and cleans up the player
public void playerClose ( )
if ( player != null )
player.close();
player.deallocate();
player = null;
public void windowClosing ( WindowEvent e )
playerClose();
System.exit ( 1 );
public void componentResized ( ComponentEvent e )
Dimension dim = getSize();
boolean mustResize = false;
if ( dim.width < MIN_WIDTH )
dim.width = MIN_WIDTH;
mustResize = true;
if ( dim.height < MIN_HEIGHT )
dim.height = MIN_HEIGHT;
mustResize = true;
if ( mustResize )
setSize ( dim );
public void windowActivated ( WindowEvent e ) { }
public void windowClosed ( WindowEvent e ) { }
public void windowDeactivated ( WindowEvent e ) { }
public void windowDeiconified ( WindowEvent e ) { }
public void windowIconified ( WindowEvent e ) { }
public void windowOpened ( WindowEvent e ) { }
public void componentHidden(ComponentEvent e) { }
public void componentMoved(ComponentEvent e) { }
public void componentShown(ComponentEvent e) { }
protected void finalize ( ) throws Throwable
playerClose();
super.finalize();
class MyToolBarAction extends AbstractAction
public MyToolBarAction ( String name, String imagefile )
// Note : Use version this if you supply your own toolbar icons
// super ( name, new ImageIcon ( imagefile ) );
super ( name );
public void actionPerformed ( ActionEvent event )
toolbarHandler ( this );
class MyVideoFormat
public VideoFormat format;
public MyVideoFormat ( VideoFormat _format )
format = _format;
public String toString ( )
Dimension dim = format.getSize();
return ( format.getEncoding() + " [ " + dim.width + " x " + dim.height + " ]" );
class MySnapshot extends JFrame
protected Image photo = null;
protected int shotNumber;
public MySnapshot ( Image grabbedFrame, Dimension imageSize )
super ( );
shotNumber = shotCounter++;
setTitle ( "Photo" + shotNumber );
photo = grabbedFrame;
setDefaultCloseOperation ( WindowConstants.DISPOSE_ON_CLOSE );
int imageHeight = photo.getWidth ( this );
int imageWidth = photo.getHeight ( this );
setSize ( imageSize.width, imageSize.height );
final FileDialog saveDialog = new FileDialog ( this, "Save JPEG", FileDialog.SAVE );
final JFrame thisCopy = this;
saveDialog.setFile ( "Photo" + shotNumber );
addWindowListener ( new WindowAdapter()
public void windowClosing ( WindowEvent e )
saveDialog.show();
String filename = saveDialog.getFile();
if ( filename != null )
if ( saveJPEG ( filename ) )
JOptionPane.showMessageDialog ( thisCopy, "Saved " + filename );
setVisible ( false );
dispose();
else
JOptionPane.showMessageDialog ( thisCopy, "Error saving " + filename );
else
setVisible ( false );
dispose();
setVisible ( true );
public void paint ( Graphics g )
g.drawImage ( photo, 0, 0, getWidth(), getHeight(), this );
* Saves an image as a JPEG
* @params the image to save
* @params the filename to save the image as
public boolean saveJPEG ( String filename )
boolean saved = false;
BufferedImage bi = new BufferedImage ( photo.getWidth(null),
photo.getHeight(null),
BufferedImage.TYPE_INT_RGB );
Graphics2D g2 = bi.createGraphics();
g2.drawImage ( photo, null, null );
FileOutputStream out = null;
try
out = new FileOutputStream ( filename );
JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder ( out );
JPEGEncodeParam param = encoder.getDefaultJPEGEncodeParam ( bi );
param.setQuality ( 1.0f, false ); // 100% high quality setting, no compression
encoder.setJPEGEncodeParam ( param );
encoder.encode ( bi );
out.close();
saved = true;
catch ( Exception ex )
System.out.println ("Error saving JPEG : " + ex.getMessage() );
return ( saved );
} // of MySnapshot
public static void main (String[] args )
try
JWebCam myWebCam = new JWebCam ( "TimeSlice Web Cam Capture" );
myWebCam.setVisible ( true );
if ( !myWebCam.initialise() )
System.out.println ("Web Cam not detected / initialised");
catch ( Exception ex )
ex.printStackTrace();
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