To create images continuously using a byte array while streaming video

Can someone please help me in creating images from a byte array continuously which is required while streaming video on implementation of RTP?

seems like this could be the class you want to look at
Package javax.imageio

Similar Messages

How do i convert an image object to a byte array ?

Hi
how do i convert an image object into a byte array
early reply apperciated

Oh sorry my method and the other method need to have the pixels from the Image passed to them which you get my using pixelgrabber:
//create width and height variables from image
          int w = img.getWidth(this);
          int h = img.getHeight(this);
          //retrive picture from image
          int[] pix = new int[w * h];
          PixelGrabber pg = new PixelGrabber(img, 0, 0, w, h, pix, 0, w);
          try{ pg.grabPixels();
          } catch (InterruptedException ioe) {
               System.err.println("Interrupted");
          if ((pg.getStatus() & ImageObserver.ABORT) != 0) {
          System.err.println("image fetch aborted or errored");
          }

How to make use of byte array to perform credit and debit in Wallet Applet

Hi,
Can anyone please explain me how to use the concept of byte arrays.. to perform credit and debit operations of a 6byte amount. Say for example.. the amount contains 3 bytes whole number, 1 byte decimal dot and 2 bytes fractional part.
It would be helpful if anyone could post a code snippet.. that way i can undersatnd easily.
Thanks in Advance
Nara

Hello
as explained in the other topic, remember your high school years and how you leart to add numbers.
then, reproduce these algorithms for base-256 numbers.
fractional? just google about fixed point math and floating point math. The first one is easier, as they are managed as integers.
example, you want to store 1,42€. Then you decide the real number to deal with is N*100, and you store 142. You get 2 decimal places of precision.
in the computer world it's easier to store n*256 as it's just a byte shift.
then the addition operations are the same, and you just interpret the values as fractional numbers.
regards
sebastien

Displaying the .png image stored in an byte array

Hi,
I have to download an .png image from a server and i have to store it in a byte array and i have to display this byte array in another servlet. I have written the code to get the image from the remote server in a java class. The java class returns the byte array of the image and i have to display that in an servlet.
If anybody has the code or any refrence to refer please help me..
Thanks & Regards
-Sandeep

I have pasted code for servlet's doGet method which writes image data...
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws
ServletException, IOException
HttpSession session = request.getSession(); //taking httpsession
response.setContentType("image/jpeg");
ServletOutputStream out = response.getOutputStream(); //taking outputstream of response
if (rtn.getErrorCode() == 0)
//this will actually write image file data from where it is being called
//byte array will contain image data, please load your image into below byte array variable
byte[] b = new byte[100];
out.write(b);
out = null; //making null
session = null; //making null
In other servlet, write <img> tag and specify its src attribute to the "name of servlet where u have pasted above code" ..
Regards,
Nikhil

I have a m2007 macbook connected to my wireless network using time capsule. I stream video to the macbook, but often get start stop of the streaming, but no wheel to indicate a buffering issue. Can I resolve this with higher speed internet and cable mod

I'm wondering if my cable internet is too slow for wireless streaming of videos to other macbooks. Any help will be appreciated

Can you clarify whether you are asking about video that you are streaming from the Internet to your Mac through the Time Capsule?
Or, are you asking about streaming video that is already stored on the Time Capsule to your Mac?
In either case, what happens....video quality wise..... if you test by temporarily turning off the wirelss on the Mac and then connecting it to one of the LAN <-> ports on the Time Capsule using a spare Ethernet cable for a few hours?

Create Image Catalog using Bridge?

I have a collection of ClipArt CD's, definietly over a thousand images in total. I'd like to create a catalog of these images, so there would be ~20 per page (I guess thumbnails), along with the file name, and the CD it came from. I suppose each CD would have it's own set of pages (E.g. header of page = "CD 23").
Is there any way I can create such a catalog using Adobe Bridge, or maybe a different Adobe product? If not, would there be any other products (ideally freeware) that would do this?

Ouch. I only have the Cs3 Production Premium package. But I have some interest in getting the 'all CS3 products ever' package, whatever it was called. Good to know it's possible w/ InDesign. Thanks for the headsup Bob.

Deriving color space of an image from a byte array input stream.

I was wondering, is it possible to derive the color space of an image, i.e. RGB, YCC, GRAY by calculating its bytes?

Calculate bytes just means doing operations on the
byte values. That's how I got the height and width of
the image. Now, I'm wondering if it is possible for
the color space.Look at the format specifications...
By the way, do all image file types have different
color space or could they all have the same color
space, for example, RGB?They can have different color spaces. RGB, ARGB, CMYK, some Adobe format...

Using iPad to view live streaming video?

Hi,
I currently got a gig recording game day videos for a local school. Right now, I'm recording with a panasonic digital camera with a firewire 800 cable going straight to my Macbook Pro. I am using iMovie right now to record it "live."
We saw an other school have a similar setup, but they are also able to stream the video to their coach's iPad. I've asked their video guy, but he didn't want to share his setup. Is there a software or additional hardware that is needed to make this possible? Any advice would be great, and thanks for your help in advance.
Cheers!

ah the old blue lego. i think means that the video/site requires flash. which the ipod touch doesn't have. and as of yet is not available.

No audio while streaming videos when using Firefox

Sometimes when I try to stream a video from sites like putlocker, sockshare, youtube etc. the video plays fine but there's no audio. Sometimes the audio will play if I reload the page. Also, if the video is playing and I pause it and then play it after some time, the audio may go off again. This is happening a little more often now and its annoying. If I play the same in another browser, the audio plays just fine.

Did you check the volume setting in the Flash player?
You can check for problems caused by recent Flash updates and try these:
*disable a possible RealPlayer Browser Record Plugin extension for Firefox and update the RealPlayer if installed
*disable protected mode in Flash 11.3 and later
*http://kb.mozillazine.org/Flash#Troubleshooting
Try to clear the Flash local storage and settings.
*Windows Control Panel > Flash Player > Storage: Local Storage Settings
**Remove a specific domain: Local Storage Settings by site
**Remove all domains: Delete All and Delete Data
Flash Website Storage Settings panel:
*http://www.macromedia.com/support/documentation/en/flashplayer/help/settings_manager07.html
Global Storage Settings Panel:
*http://www.macromedia.com/support/documentation/en/flashplayer/help/settings_manager03.html

Byte array to png image conversion

hi friends
i am using a servlet using tomcat server to send multiple images to a client. i have stored all the images in a single byte array.and then encoded using base64. i am sending it to the client side and decoding it. when i extract the byte array and then try to convert it to image it shows an illegal argument exception.please help me?
Pradeep

dubwai
Just looked at your code again. Did you mean int,not
long?He wanted an unsigned int (which of course doesn't
exist in Java) and if you look at his original code it
was returning long.Well, it's not so much that I wanted an unsigned int, it's just that the data was stored as a 32 bit unsigned integer. Since the data represented numbers with a range of 0 to 2^32 - 1, the range exceeded what I could put in a Java int, thus I need to stuff it in a long - well, that was my reasoning anyway.
Thanks for the nio tip, I'd not looked into that stuff and really should.
Lee
Thanks much for the code -

Display image from byte array

Hello Everybody,
I need to display an image given in a byte array, how can I show this image in a JFrame?
1. I tryied saving the image in a .jpg file,
     File file1 = new File("Path to my destination image");2. then I use a FileOutputStream to save the image in the path:
        FileOutputStream fos1 = new FileOutputStream(docu);
        fos1.write(ImageInbyteArray);
        fos1.close();3. Once I have the image in a file I'm trying to load it using a JButton, but the JButton doesn't display the image. I think that for some unknown (at least for me ;-) reason the file isn't still available to be used in the ImageIcon, this is my code:
        imgIconDocu = new ImageIcon("Path to my destination image");
        jBtnDocu = new JButton(imgIconDocu);What's wrong here?
Thanks a lot

Does the byte array contain a JPEG image? Where did
you get the contents of the byte array?yes the array contains the JPEG image, I have a database in PostgreSQL, and the images are stored in blob in the database. I have to call a service in the server and in return it gives me the 3 images as byte arrays, that's the reason I only have the byte arrays. so I tryed saving the images as jpeg files in my hard disk to show them, but it appears that they are not available to show them in Swing after saving them. I can only show the images if I close my application and start it again :-(
I tryed flushing and closing the FileOutputStream after the writting process (fos.write(bytearrayImage);
fos.flush();
fos.close();)
Y also tryed:
fos.write(bytearrayImage);
fos.close();
fos.flush();But it doesn't work either :-(
What do you recommend me?.
Thanks a lot,
Johnny G L

Imageicon created from byte array gives -1 height and -1 width...

Hi,
when I am trying to create an imageicon object from byte arrays the length and width of the object are coming to be -1.So I am unable to resize the image..
This is happening for only few images, most of them are working fine and I can resize it...
What possibly could be wrong??
ImageIcon imageIcon = new ImageIcon(pImageData) where pImageData is bytearray..
but I am getting imageIcon.getIconWidth()=-1
and
imageIcon.getIconHeight()=-1
Can anyone help???

es5f2000 wrote:
I'm not sure if this is related, but I believe that images which are not currently being rendered return -1, -1 as their size.It is not even correct, so I'm confident it is not related.
import java.awt.Image;
import javax.swing.ImageIcon;
import javax.imageio.ImageIO;
import java.net.URL;
class TestIconSize {
     public static void main(String[] args) throws Exception {
          Image image = ImageIO.read( new URL(
               "http://forums.sun.com/im/silver-star.gif") );
          ImageIcon imageIcon = new ImageIcon( image );
          System.out.println( "Width: " + imageIcon.getIconWidth() );
          System.out.println( "Height: " + imageIcon.getIconHeight() );
}Output.
andrew@pc1:/media/disk/projects/numbered/all$ java TestIconSize
Width: 16
Height: 16
andrew@pc1:/media/disk/projects/numbered/all$ The post after yours seems of even more dubious quality. For those (and other) reasons, I second Darryl's call for an SSCCE.

Using the jprogress bar for file byte array downloads

I am currently using a byte array to send files back and forth between computers. To show a file is transferring i change the mouse to the hour glass but would like to use the jprogressbar.
To send the file i read the file from one computer into a byte array, and then send it through an objectoutputstream. I am not sure how the file is sent or received though. What can i use to judge the length of time it takes to get one file from one computer to the other? In doing a debug, it looks like the oos sends the file to the other computer, and it is basically like an uploading process. is there a way for me to judge or tell how much of the file that is being uploaded is left?
Thanks in advance

If i know the file size how can i then check the progression? I would also like to use an progress bar on the upload of a file to the other computer, and for the download of the byte array to the other computer i could first give it the file size. if then what can i use to base my progression off of?
i looked at this and it says i am not able to do it, but thought there might have been improvements in the jdk since then, and i might not be seeing them
http://forum.java.sun.com/thread.jspa?threadID=357217&messageID=1490887
Thanks

How to create PNG file from byte array of RGB value?

Hi
Here is my problem.
I have drawn some sketchs (through code in runtime) on canvas. I have grabbed the RGB information for the drwan image and converted to byte array.
I have to pass this byte array to server and generate a png file and save.
Please help.

{color:#ff0000}Cross posted{color}
http://forum.java.sun.com/thread.jspa?threadID=5218093
{color:#000080}Cross posting is rude.
db{color}

How do I read directly from file into byte array

I am reading an image from a file into a BuffertedImage then writing it out again into an array of bytes which I store and use later on in the program. Currently Im doing this in two stages is there a way to do it it one go to speed things up.
try
            //Read File Contents into a Buffered Image
            /** BUG 4705399: There was a problem with some jpegs taking ages to load turns out to be
             * (at least partially) a problem with non-standard colour models, which is why we set the
             * destination colour model. The side effect should be standard colour model in subsequent reading.
            BufferedImage bi = null;
            ImageReader ir = null;
            ImageInputStream stream = ImageIO.createImageInputStream(new File(path));
            final Iterator i = ImageIO.getImageReaders(stream);
            if (i.hasNext())
                ir = (ImageReader) i.next();
                ir.setInput(stream);
                ImageReadParam param = ir.getDefaultReadParam();
                ImageTypeSpecifier typeToUse = null;
                for (Iterator i2 = ir.getImageTypes(0); i2.hasNext();)
                    ImageTypeSpecifier type = (ImageTypeSpecifier) i2.next();
                    if (type.getColorModel().getColorSpace().isCS_sRGB())
                        typeToUse = type;
                if (typeToUse != null)
                    param.setDestinationType(typeToUse);
                bi = ir.read(0, param);
                //ir.dispose(); seem to reference this in write
                //stream.close();
            //Write Buffered Image to Byte ArrayOutput Stream
            if (bi != null)
                //Convert to byte array
                final ByteArrayOutputStream output = new ByteArrayOutputStream();
                //Try and find corresponding writer for reader but if not possible
                //we use JPG (which is always installed) instead.
                final ImageWriter iw = ImageIO.getImageWriter(ir);
                if (iw != null)
                    if (ImageIO.write(bi, ir.getFormatName(), new DataOutputStream(output)) == false)
                        MainWindow.logger.warning("Unable to Write Image");
                else
                    if (ImageIO.write(bi, "JPG", new DataOutputStream(output)) == false)
                        MainWindow.logger.warning("Warning Unable to Write Image as JPEG");
                //Add to image list
                final byte[] imageData = output.toByteArray();
                Images.addImage(imageData);


If you don't need to manipulate the image in any way I would suggest you just read the image file directly into a byte array (without ImageReader) and then create the BufferedImage from that byte array.

To create images continuously using a byte array while streaming video

Similar Messages

Maybe you are looking for