[FFmpeg-devel] [PATCH] avcodec/allcodecs: add FFMPEG_PREFER_* env vars

[Carl Eugen Hoyos]

2018-04-19 12:15 GMT+02:00, Martin Dørum <martid0311 at gmail.com>:
> Anotehr point is that some applications make assumptions about the
> pix_fmt the decoder they get from `avcodec_find_decoder` uses.

(Unrelated to your patch afaict)
This assumption is invalid, FFmpeg has changed pix_fmt (and
sample_fmt, the same is true for audio) for decoders before
and may change it again in the future.
(Iirc, it was changed without any version bump in the past.)

Carl Eugen