On Sat, Feb 22, 2025 at 16:28 Jan Stary <h...@stare.cz> wrote: > > > Thesr contain 5.1 audio. Playing it on my stereo gear > > > (I only have two ears anyway), I would expect the players > > > (mplayer, ffplay, mpv, vlc) to do the reasonable thing: > > > figure out the "right" position in the stereo panorama > > > and play it "there". > > > > > > But it seems only mplayer does that - for example, > > > all the other players play the "center" channel on the left. > > > > > > If anyone cares about this, can you plese confirm/report what > > > the various players do with this on your stereo hardware? > > > > In short, for ffmpeg, passing `-ac 2` will force it to mix down to > > stereo. > > For the record: 'ffplay -ac 2' does not work: > it plays a 5.1 movie silently and slowly. > > The fplay(1) manpage doesn't even mention -ac, > but ffplay apparently accepts it, as an ffmpeg option.
Thanks for noting this. I don't recall having tested `-ac 2` with `ffplay`. > My testing with mpv showed that using the `--audio-channels=stereo` > > configuration option correctly mixes down to stereo with dialog > > correctly mixed across both left & right channels. > > That works, thanks. > > > $ ffplay -af "aformat=channel_layouts=stereo" ... > > That also works, thanks. Thanks for confirming that they worked for you!
