I would like to be able to go through an MJPEG file and decode each video
frame. I am having two problems with the simple code segment below. The
first is that either GetPos() is returning an incorrect value or the
current frame counter is not getting updated correctly. Here is some
sample output of the code below:
Read number: 0, Frame position: 1
Read number: 1, Frame position: 2
Read number: 2, Frame position: 2
Read number: 3, Frame position: 4
This trend of every now and then getting stuck on one frame, then skipping
the next, continues. It seems that the getting stuck on one frame and
skipping frames are always balanced, thus the frame count is never off by
more than one or two.
My second problem is that simply dumping the CImage to a bitmap file does
not create a readable bitmap file. It was my impression that
StartStreaming() and GetFrame() deal with decoding the frames so that I
don't have to. Is there something I'm missing?
Here is the code segment:
aviFile = avm::CreateReadFile(filename);
video_stream=aviFile->GetStream(0, AviStream::Video);
video_stream->StartStreaming();
for(uint_t i = 0; i < nframes; i++){
image_buffer = video_stream->GetFrame(true);
cout << "Read number: "<<i<<", Frame position: "
<<video_stream->GetPos()<<endl;
image_buffer->Dump("test.bmp");
image_buffer->Release();
}
Thanks,
Kristin Branson
_______________________________________________
Avifile mailing list
[EMAIL PROTECTED]
http://prak.org/mailman/listinfo/avifile
