[FFmpeg-user] First frame is corrupted

[Michael Koch]

> You may want to reconsider your pixel format, and whether that's really
> required for the video content you are presenting. If "anything" is
> fine, just add "-pix_fmt yuv420p" to your ffmpeg output options (or
> experiment with other 8-bit formats such as yuv444p).

with yuv420p it works fine !

> Alternatively, you might be able to upload a separate preview image. I
> can't recall whether Facebook offers that

as far as I know that's not possible in Facebook.

Thanks,
Michael