Jonas Smedegaard wrote: > Maybe your system simply treats multi-channel > audio wrongly. > > A simpler alternative to recoding audio with > fine-tuned values could be something like this to > force use only stereo: > > mpv --audio-channels=stereo ...
Yes, I've done that, in ~/.config/mpv/mpv.conf [1] audio-channels=stereo that makes me wonder, what happens if one has that _and_ downmixes as suggested? [last] is a/the zsh downmix wrapper around ffmpeg, that has worked to some extent. But, not to all extent :( Today I got this [3], checking with mm-audio [same file as mm-downmix below, line 20] as I always do since I learned of the 2 or 5.1 (6) channels, it reports $ mm-audio blade-runner-2049.avi blade-runner-2049.avi: Stream #0:1: Audio: ac3 ([0] [0][0] / 0x2000), 48000 Hz, 5.1(side), fltp, 384 kb/s 6: L R C LFE Ls Rs unfortunately $ mm-downmix Could not write header for output file #0 (incorrect codec parameters ?): Operation not permitted Error initializing output stream 0:1 -- Conversion failed! with $ file blade-runner-2049.avi blade-runner-2049.avi: RIFF (little-endian) data, AVI, 720 x 304, 23.98 fps, video: XviD, audio: Dolby AC3 (6 channels, 48000 Hz) So I think it is the avi file format that it/something cannot handle? In this file, the speech is so weak and the wrestling, arguing, and shooting (or whatever on Earth they are doing) so strong, putting bass to -5 and trebl to +5 on the stereo and turning down the volume in mpv still doesn't do it, it's too loud when shooting while barely audible when talking. I'm starting to think, can this be my ears? :O Or is this a common situation? Feel free to get the file and tell me, that'd be much appreciated... But apart from that, what can one do to downmix avi files, if that is indeed what causes the sudden malfunction of the command? #! /bin/zsh # https://dataswamp.org/~incal/conf/.zsh/audio-norm mm-downmix () { local files=($@) local name local ext local out for f in $files; do name=${f:r} ext=${f:e} out=${name}-stereo.${ext} ffmpeg -y \ -i $f \ -map 0:0 \ -map 0:1 \ -c:v copy \ -strict -2 \ -c:a libopus \ -b:a 128k \ -ac 2 \ -clev 1.414 \ -slev 0.5 $out done } [1] <https://dataswamp.org/~incal/conf/mpv/mpv.conf>, also, <https://dataswamp.org/~incal/conf/mpv/input.conf> feel free to page thru it and see if it makes sense, send a private mail if you think it is off-topic here for some reason :) I have not been using mpv for a very long time but it seems a big improvemt, no doubt. [2] https://dataswamp.org/~incal/conf/.zsh/audio-norm [3] https://pirateproxy.ink/torrent/19465184/Blade_Runner_2049.HDRip.XviD.AC3-EVO -- underground experts united http://user.it.uu.se/~embe8573 https://dataswamp.org/~incal
