[Libav-user] Problem reading motion vectors

Luis Brocan Broki brocanhu86 at gmail.com
Tue Jul 30 12:21:25 CEST 2013

Hi everyone!

I'm currently developing a program that reads the motion_val table in each
frame for doing some computations. The problem if since i've upgraded to
ffmpeg 2.0 (i come from avcodec-53 version), the second level of motion_val
table is always null, and  m_pFrame->motion_subsample_log2 is always 0.
I've tested agains mp4 (h264) videos, xvid videos, mpeg2 videos, without

Any ideas? what i'm doing wrong? it's now necessary to activate some kind
of flag? or use a filter? or how?

Thanks in advance!!
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