[FFmpeg-devel] Add 10-bit transcode support for hwaccel cuvid

[Timo Rothenpieler]

> IIRC, past conversations on this have concluded that the 'avconv'
> rewrite will allow this by
> avoiding the current problem that the encoder is fully initialised up
> front before the cuvid
> parser can run. Presumably, at some point in the future, we'll get
> through the merge backlog
> and eventually get that in.
> 
> In the meantime, I'm ok with this change. In the cases where the format
> is set correctly it
> will help, and in the cases where it is not set, it will degrade to the
> current behaviour.
> As such it's strictly an improvement.
> 

It will also not be an issue anymore once the new hw_device_ctx api
lands, at which point I'll move the creation and handling of
hw_frames_ctx entirely into cuvid.c.

Until that happens, this patch is fine with me as well.