On 11 September 2017 at 05:59, Yogender Gupta <ygu...@nvidia.com> wrote:
> I believe there were concerns on pushing the CUDA thumbnail filter and > that is possible to get similar performance using the normal thumbnail > filter. The CUDA thumbnail filter is useful for generating thumbnails on > the hwaccel cuvid pipeline, as it can directly operate on the video memory > and give significantly higher performance, owing to the fact that there are > no sysmem to vidmem copies as well as the fact that the encoding and CUDA > HW being separate, the CUDA thumbnail filter may not degrade the encode > performance at all. > > The following commands run show that using the Cuda thumbnail filter on > the hw pipeline could be 3x-4x faster. > > E:\>ffmpeg -vsync 0 -y -hwaccel cuvid -c:v h264_cuvid -i amazing.264 > -filter_complex [0:v]split=2[in0][in1];[in0]thumbnail_cuda=600,hwdownload, > format=nv12[out0];[in1]scale_npp=1920:1080 > [out1] -map [out0] thumb%03d.jpg -map [out1] -c:v h264_nvenc out.264 2> > hw.txt > > E:\>ffmpeg -vsync 0 -y -c:v h264_cuvid -i amazing.264 -filter_complex > [0:v]split=2[in0][in1];[in0]thumbnail[out0];[in1]scale[out1] -map [out0] > thumb%03d.jpg -map [out1] -c:v h264_nvenc > out.264 2> sw.txt > > Thanks, > Yogender > > ------------------------------------------------------------ > ----------------------- > This email message is for the sole use of the intended recipient(s) and > may contain > confidential information. Any unauthorized review, use, disclosure or > distribution > is prohibited. If you are not the intended recipient, please contact the > sender by > reply email and destroy all copies of the original message. > ------------------------------------------------------------ > ----------------------- > > _______________________________________________ > ffmpeg-devel mailing list > ffmpeg-devel@ffmpeg.org > http://ffmpeg.org/mailman/listinfo/ffmpeg-devel > > Only 3 to 4 times? This is easily doable with SIMD. _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
