Jan Stary wrote (2025-01-12 20:16 CET): > These are some example files from Dolby: > https://ott.dolby.com/OnDelKits/DDP/Dolby_Digital_Plus_Online_Delivery_Kit_v1.4.1/Test_Signals/muxed_streams/MPEG2TS/MPEG2TS_Muxed_Streams.html > > 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?
If you tell the players that you really want stereo, they do the right thing. $ ffplay -af "aformat=channel_layouts=stereo" ... $ mpv --audio-channels=stereo ... If you don't tell the players what to do, they will send all the channels and let the sound system deal with it. ffplay0: 48000Hz, s16le, play 0:5, 9 blocks of 480 frames ffplay0: allocated 4320/12000 fr buffers sock 5: building SETVOL message, vol = 127 cmap_init: nch = 2, ostart = 0, onext = 0, istart = 0, inext = 4 dec: s16le, 6 channels The sndiod mixing capabilities are very pragmatic with no smart logic about how to distribute missing channels to the remaining ones. It's best to tell the application what channel layout you want. Best regards, Stefan
