[FFmpeg-devel] [PATCH] (for discussion): cuvid: allow to crop and resize in decoder

[Timo Rothenpieler]

Am 12.02.2017 um 20:59 schrieb Hendrik Leppkes:
> On Sun, Feb 12, 2017 at 8:51 PM, Miroslav Slugeň <thunder.m at email.cz> wrote:
>> This patch is for discussion only, not ready to commit yet.
>>
>> 1. Cuvid decoder actualy support scaling input to requested resolution
>> without any performance penalty (like libnpp does), so this patch is proof
>> of concept that it is working like expected.
>>
> 
> I don't think scaling is something a decoder should be doing, we don't
> really want all sorts of video processing jumbled up into one
> monolithic cuvid thing, but rather keep tasks separated.

I'm generally in favor of adding this, but I don't see why ffmpeg.c
needs changes for this.
The decoder should already be free to return any video size it likes.

CUVID is kind of a huge special case with its deinterlacing already,
cropping/resizing the output is quite trivial compared to that.