[MPlayer-users] DVD audio track not recognized properly

[Alexander Roalter]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

The german "Stripes" DVD (released around 2005) has a peculiarity:

mplayer dvd://1 prints out the following:

There are 28 chapters in this DVD title.
There are 11 titles on this DVD.
There are 1 angles in this DVD title.
audio stream: 0 format: ac3 (5.1) language: en aid: 128.
audio stream: 1 format: ac3 (stereo) language: fr aid: 129.
audio stream: 2 format: ac3 (5.1) language: de aid: 130.
audio stream: 3 format: ac3 (stereo) language: en aid: 131.
subtitle ( sid ): 0 language: en
subtitle ( sid ): 1 language: fr
subtitle ( sid ): 2 language: de
subtitle ( sid ): 3 language: ar
subtitle ( sid ): 4 language: tr
subtitle ( sid ): 5 language: fr
subtitle ( sid ): 6 language: de


But playing

mplayer dvd://1 -aid 128

leads to:
...
==========================================================================
Opening audio decoder: [liba52] AC3 decoding with liba52
Using SSE optimized IMDCT transform
Unimplemented resampler for mode 0x0 -> 6 channels conversion - Contact
MPlayer developers!
Unimplemented resampler for mode 0x0 -> 5 channels conversion - Contact
MPlayer developers!
Unimplemented resampler for mode 0x0 -> 4 channels conversion - Contact
MPlayer developers!
Unimplemented resampler for mode 0x0 -> 3 channels conversion - Contact
MPlayer developers!
Using MMX optimized resampler
AUDIO: 48000 Hz, 2 ch, s16le, 32.0 kbit/2.08% (ratio: 4000->192000)
Selected audio codec: [a52] afm: liba52 (AC3-liba52)
==========================================================================

The 32.0 kbit/2.08% (ratio...) is something strange, how come there are
only 32.0 kbit. if I play the other 5.1 track, I get

==========================================================================
==========================================================================
Opening audio decoder: [liba52] AC3 decoding with liba52
Using SSE optimized IMDCT transform
Using MMX optimized resampler
AUDIO: 48000 Hz, 6 ch, s16le, 448.0 kbit/9.72% (ratio: 56000->576000)
Selected audio codec: [a52] afm: liba52 (AC3-liba52)
==========================================================================

448.0 kbit looks more like it. How come it doesn't complain about the
unimplemented resample?

Playing the french stereo track:
==========================================================================
Opening audio decoder: [liba52] AC3 decoding with liba52
Using SSE optimized IMDCT transform
Unimplemented resampler for mode 0xA -> 6 channels conversion - Contact
MPlayer developers!
Unimplemented resampler for mode 0xA -> 5 channels conversion - Contact
MPlayer developers!
Unimplemented resampler for mode 0xA -> 4 channels conversion - Contact
MPlayer developers!
Unimplemented resampler for mode 0xA -> 3 channels conversion - Contact
MPlayer developers!
Using MMX optimized resampler
AUDIO: 48000 Hz, 2 ch, s16le, 192.0 kbit/12.50% (ratio: 24000->192000)
Selected audio codec: [a52] afm: liba52 (AC3-liba52)
==========================================================================

If I change the channels by pressing # four times I get back to the
english 5.1 track, but look at this (output after pressing # for the
fourth time):

==========================================================================
AO: [alsa] 48000Hz 6ch s16le (2 bytes per sample)
==========================================================================
Opening audio decoder: [liba52] AC3 decoding with liba52
Using SSE optimized IMDCT transform
AUDIO: 48000 Hz, 6 ch, s16le, 448.0 kbit/29.17% (ratio: 56000->192000)
Selected audio codec: [a52] afm: liba52 (AC3-liba52)
==========================================================================
Now it is correctly recognized as 5.1, and I get sound from all speakers.

If I dump the disc, I get the same behaviour, so I uploaded the thing to
incoming, under the name stripes.vob

(at the moment, it is 5MB and growing, overall size is ~70MB for 1
minute, but we'll see how much I can upload with this crappy 16KB/s
upstream.

- --
Cheers,
Alex
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2.0.4-svn0 (GNU/Linux)
Comment: Using GnuPG with SUSE - http://enigmail.mozdev.org

iD8DBQFITwC01J0MF2u394wRAthUAJ9UathRCWE4J0LqjBkOJQ3Rn0UyKwCfQEWh
eOjGqvu2ELu+Ie4DdbEcRxM=
=siEW
-----END PGP SIGNATURE-----