[FFmpeg-devel] [PATCH 2/3] avfilter/vf_yadif_cuda: CUDA accelerated deinterlacer

[Carl Eugen Hoyos]

2018-11-01 22:12 GMT+01:00, Philip Langdale <philipl at overt.org>:
> On 2018-11-01 14:05, Timo Rothenpieler wrote:
>> On 01.11.2018 21:54, Carl Eugen Hoyos wrote:
>>> 2018-10-26 17:56 GMT+02:00, Philip Langdale <philipl at overt.org>:
>>>
>>> Could you add some sample numbers about how fast the cuda
>>> variant is compared to cpu?
>>
>> I don't think such numbers are overly useful by themselves.
>> The primary benefit here is that it's now possible to decode,
>> deinterlace and encode all without pulling the frames out of VRAM.
>>
>> Though it would definitely be interesting. I guess hwupload +
>> yadif_cuda + hwdownload vs. normal yadif is a fair comparison?
>
> Yeah, the comparison is a bit fuzzy, because you completely
> change how you think about solving the problem depending on whether
> you have a filter available or not. But I did get some data previously.
>
> For cpu decode + cpu yadif, the yadif slowdown is ~50%
> For gpu decode + gpu yadif, the yadif slowdown is ~25%

Thank you!

Carl Eugen