webm vp9 files with opus or vorbis cut out or crackle
OS: Win 10 2004 VLC: 30.0.10 Vetinari CPU: i7-8700 GPU: nvidia gtx 1070
I've tried 7 different video files mostly coming from aac 5.1 surround. These files have been converted to vp9 thru ffmpeg. I've tried specifying audio codecs, specific bitrates, both vorbis and opus. Some files with side channel I need to specify channel map, others I dont. The result is always the same.
ffmpeg -i input.mp4 -c:v libvpx-vp9 -crf 28 output_vp9.webm
Reproducing should be as easy as playing any 5.1 vp9 webm with vorbis or opus, I would assume.
examples: original file: https://drive.google.com/file/d/0BwxFVkl63-lEcU1ScWZuMjhpOXM/view output: https://otterbro.com/downloads/vp9_Opus.webm