[Libav-user] partial decoding of mp4 files

[Carl Eugen Hoyos]

2017-05-17 13:32 GMT+02:00 Sam Halliday <sam.halliday at gmail.com>:

> Is there a way to get hold of low level information, i.e. partial
> decodings, of an mp4 file? Since this is all I need for my analysis, I
> hope it would be more efficient than decoding the entire video:
>
> 1. key frames (skipping motion compensation frames) as
> decoded images

See the -skip_frame option.

I believe motion vectors are produced as part of decoding and that
cannot be optimized easily.

Carl Eugen