How to use

getPreviousKeyFrame

method

in

us.ihmc.codecs.demuxer.MP4VideoDemuxer

private void decodeLeadingFrames() throws IOException
{
 long frameNo = videoTrack.getCurFrame();
 long keyFrame = getPreviousKeyFrame(frameNo);
 
 if(keyFrame == frameNo)
 {
   return;
 }
 if(!videoTrack.gotoFrame(keyFrame))
 {
   throw new IOException("Invalid frame no: " + keyFrame);
 }
 
 
 Packet frame;
 do
 {
   buffer.clear();
   frame = videoTrack.nextFrame(buffer);
   if(frame == null)
   {
    throw new IOException("Cannot decode frame");
   }
   demuxerHelper.skipFrame(frame); 
 }
 while(frame.getFrameNo() < (frameNo - 1));
}

private void decodeLeadingFrames() throws IOException
{
 long frameNo = videoTrack.getCurFrame();
 long keyFrame = getPreviousKeyFrame(frameNo);
 
 if(keyFrame == frameNo)
 {
   return;
 }
 if(!videoTrack.gotoFrame(keyFrame))
 {
   throw new IOException("Invalid frame no: " + keyFrame);
 }
 
 
 Packet frame;
 do
 {
   buffer.clear();
   frame = videoTrack.nextFrame(buffer);
   if(frame == null)
   {
    throw new IOException("Cannot decode frame");
   }
   demuxerHelper.skipFrame(frame); 
 }
 while(frame.getFrameNo() < (frameNo - 1));
}