On Sun, 12 Feb 2017 22:43:41 +0100 Miroslav Slugeň <thunde...@email.cz> wrote:
> Dne 12.2.2017 v 22:31 Timo Rothenpieler napsal(a): > > On 2/12/2017 10:25 PM, Miroslav Slugeň wrote: > >> This patch is for discussion only, not ready to commit yet and > >> maybe newer will be. > >> > >> NVENC in current CUDA 8 SDK is setting wrong aspect ratio when > >> encoding resolution 720x576 and 720x480 and using AR 4:3 or 16:9 > >> it will encode to h264 header that 15:11 and 20:11 is used. This > >> is very very very ugly way how to fix it. I hope someone in NVIDIA > >> will fix this soon, because all encoded streams are not displayed > >> correctly for example in videojs player. > > nvenc.c had some compensation for this, which was somewhat recently > > removed, because nvidia fixed something regarding it: > > > > http://git.videolan.org/?p=ffmpeg.git;a=commit;h=829db8effd76b579ae9aca5ee8f85d3ade6af253 > > _______________________________________________ > > ffmpeg-devel mailing list > > ffmpeg-devel@ffmpeg.org > > http://ffmpeg.org/mailman/listinfo/ffmpeg-devel > I know that, i am monitoring all nvenc and cuvid changes in ffmpeg. > > Fix is not working anymore in current drivers. What is working is if > you set aspect ratio 16000x9001 it will give you almost correct > output, but fixing this in h264 SPP is better solution. > > M. > _______________________________________________ > ffmpeg-devel mailing list > ffmpeg-devel@ffmpeg.org > http://ffmpeg.org/mailman/listinfo/ffmpeg-devel If it's still happening, let's just restore the original workaround. But I stopped being able to reproduce the problem locally, and I can't reproduce it right now with a 720x576 sample. Note that the SDK is completely irrelevant to playback behaviour. The CUDA SDK doesn't include current cuvid/nvenc headers and the Video SDK isn't required because we bundle/reimplement headers with ffmpeg. You are likely not using a new enough driver release to have the fix in it. I'm using 378.09 here. --phil _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
