Hey there, Lower your decoder threads and retest:
ffmpeg -threads 1 -vsync 1 -hwaccel cuvid -c:v h264_cuvid -deint 1 -drop_second_field 1 -i 'http://0.0.0.0:4603' -c:v h264_nvenc -vb 1000k -preset:v medium -c:a aac -ac 2 -ar 48k -ab 96k test.mp4 Now with the yadif_cuda filter: ffmpeg -threads 1 -vsync 1 -hwaccel nvdec -hwaccel_output_format cuda -i 'http://0.0.0.0:4603' -vf "yadif_cuda" -c:v h264_nvenc -vb 1000k -preset:v medium -c:a aac -ac 2 -ar 48k -ab 96k test.mp4 For usage see: ffmpeg -h filter=yadif_cuda For what to expect, see https://stackoverflow.com/questions/55687189/how-to-use-gpu-to-accelerate-the-processing-speed-of-ffmpeg-filter/55747785#55747785 Running the nvdec & cuvid decoders with multiple threads is the fastest way to land in hot water. Infact, the decoder will warn you if threads (either in auto mode or manually set) exceed 16. These hwaccels do not implement threading. You can confirm that by running: ffmpeg -h decoder=h264_cuvid And see that threading is not a reported capability. I also changed your commands to -vsync 1 as the MP4 muxer implelentation in libav supports CFR only, and NALU HRD stuffing isn't supported. Even if you're using libx264, do not use -x264-params "nal-hrd=cbr" When generating (f)mp4 content as you'll generate invalid output, with audio predominantly out of sync. If you truly require VFR output as part of your workflow, then stick to either mpegts (also supported in chunks via HLS or segment muxer) OR matroska (mkv). Cheers, Dennis M. On Sat, 16 Nov 2019 at 20:37, Ted Park <[email protected]> wrote: > > How is the stream being served over http? Does it make any difference if you > save a file wget for example first? > _______________________________________________ > ffmpeg-user mailing list > [email protected] > https://ffmpeg.org/mailman/listinfo/ffmpeg-user > > To unsubscribe, visit link above, or email > [email protected] with subject "unsubscribe". _______________________________________________ ffmpeg-user mailing list [email protected] https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email [email protected] with subject "unsubscribe".
