On 2/12/2017 10:43 PM, Miroslav Slugeň 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 > 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.
Imo the best would be to contact nvidia about this potential bug. Maybe a leftover from removing the old compensation logic? Actually fixing the driver would definitely be the best solution here. Adding some of the @nvidia.com people from this ML to CC, maybe they can forward the issue to the right place.
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