[Libav-user] Access to motions vectors and macroblock in P_FRAME lib264

[NDJORE BORIS]

Le dim. 10 mars 2019 23:41, Carl Eugen Hoyos <ceffmpeg at gmail.com> a écrit :

> 2019-03-06 16:07 GMT+01:00, NDJORE BORIS <ndjoreboris at gmail.com>:
> > Le mer. 6 mars 2019 à 14:19, Carl Eugen Hoyos <ceffmpeg at gmail.com> a
> écrit
> > :
> >
> >> 2019-03-06 11:56 GMT+01:00, NDJORE BORIS <ndjoreboris at gmail.com>:
> >>
> >> > I want to extract all motion vectors in P_type mocroblock  in a
> >> > P_frame during encoding h264 video with libx264 (x264).
> >>
> >> Since x264 != FFmpeg, this cannot be answered here.
> >> (I don't know if x264 offers an api to export the info but
> >> if the api exists, it is not supported by FFmpeg).
> >>
> > Ok. It means that it is not possible to have such info
> > with x264 (x264Context)?
>
> It means that I don't know if libx264 offers the information
> but it is not available through FFmpeg.
>
> > I understand and I want to know if the only encoder we
> > can use to transcode h264 video format is x264?
>
> No, several other encoders including libopenh264, vaapi,
> qsv, videotoolbox, nvenc and amf exist in FFmpeg.
>
> Carl Eugen
>
>
> Then, we can have access to motion vectors informations with these
> encoders? If yes, tell me how to use them, please.

I just enabled vaapi in my configure options but It doesn't work. I have
the error : vaapi hardware is needed.
Thanks
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