[Libav-user] Motion Vectors extraction with HEVC Videos

[Mauricio Lisboa Perez]

Hello all,

I am trying to use the extract_mvs example from doc/examples with HEVC
videos, but unfortunately no motion vector information is present in the
output. With H264 it is working fine.
I have observed this is due to the fact that no side_data is returned for
the extracted frames.

Could it be that this feature is still not available to HEVC codec?
Or I should retrieve this information by other means, such as directly
extracting a HEVCFrame? If so, how could I do this?

I am using FFMPEG 2.7 and I have installed and enabled libx265:

 $ ffmpeg -buildconf

ffmpeg version 2.7 Copyright (c) 2000-2015 the FFmpeg developers
>   built with gcc 4.8 (Ubuntu 4.8.2-19ubuntu1)
>   configuration: --prefix=/home/mperez/dev/ffmpeg-2.7/build
> --enable-libx265 --enable-gpl
>   libavutil      54. 27.100 / 54. 27.100
>   libavcodec     56. 41.100 / 56. 41.100
>   libavformat    56. 36.100 / 56. 36.100
>   libavdevice    56.  4.100 / 56.  4.100
>   libavfilter     5. 16.101 /  5. 16.101
>   libswscale      3.  1.101 /  3.  1.101
>   libswresample   1.  2.100 /  1.  2.100
>   libpostproc    53.  3.100 / 53.  3.100
>
>   configuration:
>     --prefix=/home/mperez/dev/ffmpeg-2.7/build
>     --enable-libx265
>     --enable-gpl
>

Thanks in advance.

[ ]'s,
Mauricio Lisboa Perez
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