[FFmpeg-devel] [PATCH] avfilter: add nvidia NPP based transpose filter

Timo Rothenpieler timo at rothenpieler.org
Sat Sep 8 19:16:47 EEST 2018

On 9/8/2018 5:38 PM, Paul B Mahol wrote:
>> I'll probably remove the interp_algo from this before committing, hard
>> coding it to nearest neighbor. I'm unable to see any difference between
>> them for perfect 90DEG angles except that NN is easily 10 times faster
>> than the current default Cubic.
> Perhaps interpolation is useful for other pixel format where vertical
> and horizontal subsampling are not same.

This only supports yuv420p and yuv444p so I don't think it's an issue. 
It's impossible for such formats to end up in a CUDA frame to begin 
with, since nothing supports putting them in there.

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