[MPlayer-users] No sound with an ac3 sample

[Reimar Döffinger]

On Thu, Mar 27, 2014 at 09:47:35PM +0100, Ingo Brückl wrote:
> There is an ac3 sample in incoming (nosound.ac3) which I cannot play, because
> it won't be recognized as audio file (Audio: no sound).
> 
> I can however convert it into a mp3 file with ffmpeg which plays, so there
> surely is sound.
> 
> However,
> 
>   [format] Sample format big-endian AC3 not yet supported
> 
> is strange, because all AC3 I can play seem to be ac3be and will be played
> as ac3le then.
> 
> The format passed to af_format's check_format() - which is called twice - is
> 9 and 264 by the way.

The problem isn't there.
MPlayer request 44100 HZ sample rate, but ALSA refuses that and only
offers 48000 Hz.
MPlayer then tries to resample, but AC3 can't be resampled.
Or in short: you are trying to use passthrough with
a format that ALSA says your hardware doesn't support.