How can I get metddata of video?

Question

Hello
I'm developing video player & annotation system with JMF & Fobs4JMF.
video player works well.
however, I want to get metainformation about video source.
such as video resolution, the number of total frames, duration, and so on.
on the controlPanelComponent of JMF, media property busson shows that meta-information.
but I want to get those information and save into my variables.
how can I do that?
thanks in advance.

Answer 1

You have to look a few different places for the info you're looking for, but here's some sample code to help you out...
/* Load our input video into a DataSource */
DataSource video_in = Manager.createDataSource("test.avi");
/* Create a processor and realize it for our video */
Processor P = Manager.createProcessor(video_in);
P.realize();
/* Extract the TrackControl for the visual track of our video */
TrackControl tc = null;
for (TrackControl temp = P.getTrackControls()) {
     if(temp.getFormat() instanceof VideoFormat) {
          tc = temp;
          break;
/* Check to make sure we have video data */
if (tc == null) {
     System.err.println("Error. Source has no video data!\n");
     System.exit(1);
/* Get the VideoFormat object of our video */
VideoFormat vf = (VideoFormat)tc.getFormat();
/* Print out some info about our video */
System.out.println("Frame rate:  "+vf.getFrameRate());
System.out.println("Duration:    "+P.getDuration());
Systme.out.println("Total frames:"+(int)(vf.getFrameRate() * P.getDuration()));
System.out.println("Resolution:  "+vf.getSize().getWidth()+"x"+vf.getSize().getHeight());
System.out.println("Encoding:    "+vf.getEncoding());