[MPlayer-users] Re: [Fwd: dts decoding broken?]

[mail at kraymer.de]

> I accidently sent the following mail to ffmpeg-dev while I intended to
> post here..
> -------- Original Message --------
> Subject: dts decoding broken?
> From: <mail at kraymer.de>
> Date: Fri, February 9, 2007 5:52 pm
> To: <ffmpeg-devel at mplayerhq.hu>
>
> Hello,
>
> [...]
> Please find mplayer output (with ffmpeg -r 7839) attached.


I compared the output to the verbose output of a working version (ffmpeg
externals -r 7838, also attached) and noticed the following change:
Not working:
Building audio filter chain for 48000Hz/6ch/s16le -> 0Hz/0ch/??...
[libaf] Adding filter dummy
[dummy] Was reinitialized: 48000Hz/6ch/s16le
[dummy] Was reinitialized: 48000Hz/6ch/s16le
alsa-init: requested format: 48000 Hz, 6 channels, 9
alsa-init: using ALSA 1.0.14rc1
alsa-init: device set to surround51
alsa-init: using device surround51
alsa-init: pcm opened in blocking mode
alsa-init: chunksize set to 1024
alsa-init: fragcount=16
alsa-init: got buffersize=196608
alsa-init: got period size 1024
alsa: 48000 Hz/6 channels/12 bpf/196608 bytes buffer/Signed 16 bit Little
EndianAO: [alsa] 48000Hz 6ch s16le (2 bytes per sample)



Working:

Building audio filter chain for 48000Hz/2ch/s16le -> 0Hz/0ch/??...
[libaf] Adding filter dummy
[dummy] Was reinitialized: 48000Hz/2ch/s16le
[dummy] Was reinitialized: 48000Hz/2ch/s16le
alsa-init: requested format: 48000 Hz, 2 channels, 9
alsa-init: using ALSA 1.0.14rc1
alsa-init: setup for 1/2 channel(s)
alsa-init: using device default
alsa-init: pcm opened in blocking mode
alsa-init: chunksize set to 1024
alsa-init: fragcount=16
alsa-init: got buffersize=65536
alsa-init: got period size 1024
alsa: 48000 Hz/2 channels/4 bpf/65536 bytes buffer/Signed 16 bit Little
EndianAO: [alsa] 48000Hz 2ch s16le (2 bytes per sample)


So setting output device to surround51 results in wrong playback for a 2.0
setup and I think it's mplayer's fault..
Hope this is enlightening for someone.


Sebastian

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