How to capture an image from a clip
Hi,
Is there a way to capture an image from a movie clip using iMovie 06?
I would like to save some frames from the vedio footage as photos.
Any help will be greatly appreciated. Thank you.
New Mac User
Mac OS X (10.4.5)
Hi iMac User:
Yes-you can save a single frame from iMovie by selecting the File-->Save Frame As option. From there it will ask you where and in what format you want to save it.
Just be aware that the quality won't be perfect because it is taken from a video clip.
Sue
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Hi all ,
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I use Labview 7 .Pedrus wrote:
> Hi all ,
> How do I acquire images from my usb webcam (logitech quickcam express)?
> I use Labview 7 .
This seems a very popular question coming up about once every week at
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or
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thanks.hi
so as i understood u want to access the USB and make whats called camera interaction i worked with my webcam and i generate a video stream and i'm working now to sample this video
i found these class on the internet u have to make a littel changes like camera defention
* File: DeviceInfo.java.java
* created 24.07.2001 21:44:12 by David Fischer, [email protected]
import java.awt.Dimension;
import javax.media.*;
import javax.media.control.*;
import javax.media.format.*;
import javax.media.protocol.*;
public class DeviceInfo
public static Format formatMatches (Format format, Format supported[] )
if (supported == null)
return null;
for (int i = 0; i < supported.length; i++)
if (supported.matches(format))
return supported[i];
return null;
public static boolean setFormat(DataSource dataSource, Format format)
boolean formatApplied = false;
FormatControl formatControls[] = null;
formatControls = ((CaptureDevice) dataSource).getFormatControls();
for (int x = 0; x < formatControls.length; x++)
if (formatControls[x] == null)
continue;
Format supportedFormats[] = formatControls[x].getSupportedFormats();
if (supportedFormats == null)
continue;
if (DeviceInfo.formatMatches(format, supportedFormats) != null)
formatControls[x].setFormat(format);
formatApplied = true;
return formatApplied;
public static boolean isVideo(Format format)
return (format instanceof VideoFormat);
public static boolean isAudio(Format format)
return (format instanceof AudioFormat);
public static String formatToString(Format format)
if (isVideo(format))
return videoFormatToString((VideoFormat) format);
if (isAudio(format))
return audioFormatToString((AudioFormat) format);
return ("--- unknown media device format ---");
public static String videoFormatToString(VideoFormat videoFormat)
StringBuffer result = new StringBuffer();
// add width x height (size)
Dimension d = videoFormat.getSize();
result.append("size=" + (int) d.getWidth() + "x" + (int) d.getHeight() + ", ");
// try to add color depth
if (videoFormat instanceof IndexedColorFormat)
IndexedColorFormat f = (IndexedColorFormat) videoFormat;
result.append("color depth=" + f.getMapSize() + ", ");
// add encoding
result.append("encoding=" + videoFormat.getEncoding() + ", ");
// add max data length
result.append("maxdatalength=" + videoFormat.getMaxDataLength() + "");
return result.toString();
public static String audioFormatToString(AudioFormat audioFormat)
StringBuffer result = new StringBuffer();
// short workaround
result.append(audioFormat.toString().toLowerCase());
return result.toString();
the second class:
* File: MyDataSinkListener.java
* created 24.07.2001 21:41:47 by David Fischer, [email protected]
* Decription: simple data sink listener, used to check for end of stream
import javax.media.datasink.*;
public class MyDataSinkListener implements DataSinkListener
boolean endOfStream = false;
public void dataSinkUpdate(DataSinkEvent event)
if (event instanceof javax.media.datasink.EndOfStreamEvent)
endOfStream = true;
public void waitEndOfStream(long checkTimeMs)
while (! endOfStream)
Stdout.log("datasink: waiting for end of stream ...");
try { Thread.currentThread().sleep(checkTimeMs); } catch (InterruptedException ie) {}
Stdout.log("datasink: ... end of stream reached.");
* File: MyDataSinkListener.java
* created 24.07.2001 21:41:47 by David Fischer, [email protected]
* Decription: simple data sink listener, used to check for end of stream
import javax.media.datasink.*;
public class MyDataSinkListener implements DataSinkListener
boolean endOfStream = false;
public void dataSinkUpdate(DataSinkEvent event)
if (event instanceof javax.media.datasink.EndOfStreamEvent)
endOfStream = true;
public void waitEndOfStream(long checkTimeMs)
while (! endOfStream)
Stdout.log("datasink: waiting for end of stream ...");
try { Thread.currentThread().sleep(checkTimeMs); } catch (InterruptedException ie) {}
Stdout.log("datasink: ... end of stream reached.");
}[i]the 3rd class:/******************************************************
* File: Stdout.java.java
* created 24.07.2001 21:44:46 by David Fischer, [email protected]
* Description: utility class for standard output
public class Stdout
public static void log(String msg)
System.out.println(msg);
public static void logAndAbortException(Exception e)
log("" + e);
flush();
System.exit(0);
public static void logAndAbortError(Error e)
log("" + e);
flush();
System.exit(0);
public static void flush()
System.out.flush();
the 4rt is :
* File: TestQuickCamPro.java
* created 24.07.2001 21:40:13 by David Fischer, [email protected]
* Description: this test program will capture the video and audio stream
* from a Logitech QuickCam� Pro 3000 USB camera for 10 seconds and stores
* it on a file, named "testcam.avi". You can use the microsoft windows
* media player to display this file.
* operating system: Windows 2000
* required hardware: Logitech QuickCam� Pro 3000
* required software: jdk 1.3 or jdk1.4 plus jmf2.1.1 (www.javasoft.com)
* source files: DeviceInfo.java, MyDataSinkListener.java,
* Stdout.java, TestQuickCamPro.java
* You can just start this program with "java TestQuickCamPro"
* hint: please make shure that you setup first the logitech camerea drives
* and jmf2.1.1 correctly. "jmf.jar" must be part of your CLASSPATH.
* useful links:
* - http://java.sun.com/products/java-media/jmf/2.1.1/index.html
* - http://java.sun.com/products/java-media/jmf/2.1.1/solutions/index.html
* with some small modifications, this program will work with any USB camera.
import java.io.*;
import javax.media.*;
import javax.media.control.*;
import javax.media.datasink.*;
import javax.media.format.*;
import javax.media.protocol.*;
public class TestQuickCamPro
private static boolean debugDeviceList = false;
private static String defaultVideoDeviceName = "vfw:Microsoft WDM Image Capture (Win32):0";
private static String defaultAudioDeviceName = "DirectSoundCapture";
private static String defaultVideoFormatString = "size=176x144, encoding=yuv, maxdatalength=38016";
private static String defaultAudioFormatString = "linear, 16000.0 hz, 8-bit, mono, unsigned";
private static CaptureDeviceInfo captureVideoDevice = null;
private static CaptureDeviceInfo captureAudioDevice = null;
private static VideoFormat captureVideoFormat = null;
private static AudioFormat captureAudioFormat = null;
public static void main(String args[])
// get command line arguments
for (int x = 0; x < args.length; x++)
// -dd = debug devices list -> display list of all media devices - and exit
if (args[x].toLowerCase().compareTo("-dd") == 0)
debugDeviceList = true;
// get a list of all media devices, search default devices and formats, and print it out if args[x] = "-dd"
Stdout.log("get list of all media devices ...");
java.util.Vector deviceListVector = CaptureDeviceManager.getDeviceList(null);
if (deviceListVector == null)
Stdout.log("... error: media device list vector is null, program aborted");
System.exit(0);
if (deviceListVector.size() == 0)
Stdout.log("... error: media device list vector size is 0, program aborted");
System.exit(0);
for (int x = 0; x < deviceListVector.size(); x++)
// display device name
CaptureDeviceInfo deviceInfo = (CaptureDeviceInfo) deviceListVector.elementAt(x);
String deviceInfoText = deviceInfo.getName();
if (debugDeviceList)
Stdout.log("device " + x + ": " + deviceInfoText);
// display device formats
Format deviceFormat[] = deviceInfo.getFormats();
for (int y = 0; y < deviceFormat.length; y++)
// serach for default video device
if (captureVideoDevice == null)
if (deviceFormat[y] instanceof VideoFormat)
if (deviceInfo.getName().indexOf(defaultVideoDeviceName) >= 0)
captureVideoDevice = deviceInfo;
Stdout.log(">>> capture video device = " + deviceInfo.getName());
// search for default video format
if (captureVideoDevice == deviceInfo)
if (captureVideoFormat == null)
if (DeviceInfo.formatToString(deviceFormat[y]).indexOf(defaultVideoFormatString) >= 0)
captureVideoFormat = (VideoFormat) deviceFormat[y];
Stdout.log(">>> capture video format = " + DeviceInfo.formatToString(deviceFormat[y]));
// serach for default audio device
if (captureAudioDevice == null)
if (deviceFormat[y] instanceof AudioFormat)
if (deviceInfo.getName().indexOf(defaultAudioDeviceName) >= 0)
captureAudioDevice = deviceInfo;
Stdout.log(">>> capture audio device = " + deviceInfo.getName());
// search for default audio format
if (captureAudioDevice == deviceInfo)
if (captureAudioFormat == null)
if (DeviceInfo.formatToString(deviceFormat[y]).indexOf(defaultAudioFormatString) >= 0)
captureAudioFormat = (AudioFormat) deviceFormat[y];
Stdout.log(">>> capture audio format = " + DeviceInfo.formatToString(deviceFormat[y]));
if (debugDeviceList)
Stdout.log(" - format: " + DeviceInfo.formatToString(deviceFormat[y]));
Stdout.log("... list completed.");
// if args[x] = "-dd" terminate now
if (debugDeviceList)
System.exit(0);
// setup video data source
MediaLocator videoMediaLocator = captureVideoDevice.getLocator();
DataSource videoDataSource = null;
try
videoDataSource = javax.media.Manager.createDataSource(videoMediaLocator);
catch (IOException ie) { Stdout.logAndAbortException(ie); }
catch (NoDataSourceException nse) { Stdout.logAndAbortException(nse); }
if (! DeviceInfo.setFormat(videoDataSource, captureVideoFormat))
Stdout.log("Error: unable to set video format - program aborted");
System.exit(0);
// setup audio data source
MediaLocator audioMediaLocator = captureAudioDevice.getLocator();
DataSource audioDataSource = null;
try
audioDataSource = javax.media.Manager.createDataSource(audioMediaLocator);
catch (IOException ie) { Stdout.logAndAbortException(ie); }
catch (NoDataSourceException nse) { Stdout.logAndAbortException(nse); }
if (! DeviceInfo.setFormat(audioDataSource, captureAudioFormat))
Stdout.log("Error: unable to set audio format - program aborted");
System.exit(0);
// merge the two data sources
DataSource mixedDataSource = null;
try
DataSource dArray[] = new DataSource[2];
dArray[0] = videoDataSource;
dArray[1] = audioDataSource;
mixedDataSource = javax.media.Manager.createMergingDataSource(dArray);
catch (IncompatibleSourceException ise) { Stdout.logAndAbortException(ise); }
// create a new processor
// setup output file format ->> msvideo
FileTypeDescriptor outputType = new FileTypeDescriptor(FileTypeDescriptor.MSVIDEO);
// setup output video and audio data format
Format outputFormat[] = new Format[2];
outputFormat[0] = new VideoFormat(VideoFormat.INDEO50);
outputFormat[1] = new AudioFormat(AudioFormat.GSM_MS /* LINEAR */);
// create processor
ProcessorModel processorModel = new ProcessorModel(mixedDataSource, outputFormat, outputType);
Processor processor = null;
try
processor = Manager.createRealizedProcessor(processorModel);
catch (IOException e) { Stdout.logAndAbortException(e); }
catch (NoProcessorException e) { Stdout.logAndAbortException(e); }
catch (CannotRealizeException e) { Stdout.logAndAbortException(e); }
// get the output of the processor
DataSource source = processor.getDataOutput();
// create a File protocol MediaLocator with the location
// of the file to which bits are to be written
MediaLocator dest = new MediaLocator("file:testcam.avi");
// create a datasink to do the file
DataSink dataSink = null;
MyDataSinkListener dataSinkListener = null;
try
dataSink = Manager.createDataSink(source, dest);
dataSinkListener = new MyDataSinkListener();
dataSink.addDataSinkListener(dataSinkListener);
dataSink.open();
catch (IOException e) { Stdout.logAndAbortException(e); }
catch (NoDataSinkException e) { Stdout.logAndAbortException(e); }
catch (SecurityException e) { Stdout.logAndAbortException(e); }
// now start the datasink and processor
try
dataSink.start();
catch (IOException e) { Stdout.logAndAbortException(e); }
processor.start();
Stdout.log("starting capturing ...");
try { Thread.currentThread().sleep(10000); } catch (InterruptedException ie) {} // capture for 10 seconds
Stdout.log("... capturing done");
// stop and close the processor when done capturing...
// close the datasink when EndOfStream event is received...
processor.stop();
processor.close();
dataSinkListener.waitEndOfStream(10);
dataSink.close();
Stdout.log("[all done]");
}finally search with the athour name there is an additional program u must download to detect ur cam .
i hope that is work with u -
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regards,
vaishali
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