sout transcode mono to stereo? (for raop)

[gnippiks]

Is it possible to transcode a single-channel audio stream to a two-channel audio stream (e.g. by duplicating the audio to both channels)?

The reason I need to do this is that the raop module (for streaming via Apple AirTunes) requires 2-channel, 44.1kHz ALAC audio as an input, but

Code: Select all

#transcode(acodec=alac,channels=2,samplerate=44100):raop

doesn't seem to convert a mono audio stream to stereo.

I posted some more details in the VLC for Mac OS X forum but I don't think this problem is Mac-specific.
viewtopic.php?f=12&t=79400#p267137

[Jean-Baptiste Kempf]

I am not sure we have the right filter to do so.