No sound with .mov, PCM S24 BE (in24)

[eminenz]

I'm grateful to be able to play Quicktime .mov files with VLC, but don't get any sound with a file
for which VLC indicates the audio codec as PCM S24 BE (in24).
(Video codec is DV video (dvcp).)
Another Quicktime .mov file with MPEG AAC Audio (mp4a) plays fine.
I've updated my WIn7 64-bit codecs using version 9.9.9
of K-Lite Codec Pack 64-bit.
Any ideas how to resolve the problem and get sound?
Thanks so very much!

[Rémi Denis-Courmont]

Try with VLC 2.1 prereleases. If it still fails file a bug and attach a sample file.

[rvdboom]

It may not be related at all, but I currently struggle with the recent versions of alsa and vlc to get proper sound support. I had an issue with downmixing of 5.1 to stereo that I thought was because of newer VLC channel map support, until I realized that I also had problems with the ALSA provided aplay.
I have 24 bits 5.1 Wav sound tracks. If I play them with just the following command, it works :

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aplay -v Master51FemmeSqueletteDCP_24fps.wav Lecture WAVE 'Master51FemmeSqueletteDCP_24fps.wav' : Signed 24 bit Little Endian in 3bytes, Fréquence 48000 Hz, 6 Canaux Plug PCM: Route conversion PCM (sformat=S32_LE) Transformation table: 0 <- 0 1 <- 1 Its setup is: stream : PLAYBACK access : RW_INTERLEAVED format : S24_3LE subformat : STD channels : 6 rate : 48000 exact rate : 48000 (48000/1) msbits : 24 buffer_size : 8192 period_size : 1024 period_time : 21333 tstamp_mode : NONE period_step : 1 avail_min : 1024 period_event : 0 start_threshold : 8192 stop_threshold : 8192 silence_threshold: 0 silence_size : 0 boundary : 4611686018427387904 Slave: Soft volume PCM Control: PCM Playback Volume min_dB: -51 max_dB: 0 resolution: 256 Its setup is: stream : PLAYBACK access : MMAP_INTERLEAVED format : S32_LE subformat : STD channels : 2 rate : 48000 exact rate : 48000 (48000/1) msbits : 32 buffer_size : 8192 period_size : 1024 period_time : 21333 tstamp_mode : NONE period_step : 1 avail_min : 1024 period_event : 0 start_threshold : 8192 stop_threshold : 8192 silence_threshold: 0 silence_size : 0 boundary : 4611686018427387904 Slave: Direct Stream Mixing PCM Its setup is: stream : PLAYBACK access : MMAP_INTERLEAVED format : S32_LE subformat : STD channels : 2 rate : 48000 exact rate : 48000 (48000/1) msbits : 32 buffer_size : 8192 period_size : 1024 period_time : 21333 tstamp_mode : NONE period_step : 1 avail_min : 1024 period_event : 0 start_threshold : 8192 stop_threshold : 8192 silence_threshold: 0 silence_size : 0 boundary : 4611686018427387904 Hardware PCM card 0 'HDA ATI SB' device 0 subdevice 0 Its setup is: stream : PLAYBACK access : MMAP_INTERLEAVED format : S32_LE subformat : STD channels : 2 rate : 48000 exact rate : 48000 (48000/1) msbits : 32 buffer_size : 8192 period_size : 1024 period_time : 21333 tstamp_mode : ENABLE period_step : 1 avail_min : 1024 period_event : 0 start_threshold : 1 stop_threshold : 4611686018427387904 silence_threshold: 0 silence_size : 4611686018427387904 boundary : 4611686018427387904 appl_ptr : 0 hw_ptr : 0

If I play them forcing one of the Alsa PCM, I get an error because of unsupported sound format :

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bash-4.2$ aplay -v -D surround51 Master51FemmeSqueletteDCP_24fps.wav Lecture WAVE 'Master51FemmeSqueletteDCP_24fps.wav' : Signed 24 bit Little Endian in 3bytes, Fréquence 48000 Hz, 6 Canaux aplay: set_params:1233: Ce format d'échantillonage n'est pas disponible Available formats: - S16_LE - S32_LE bash-4.2$ aplay -v -D front Master51FemmeSqueletteDCP_24fps.wav Lecture WAVE 'Master51FemmeSqueletteDCP_24fps.wav' : Signed 24 bit Little Endian in 3bytes, Fréquence 48000 Hz, 6 Canaux aplay: set_params:1233: Ce format d'échantillonage n'est pas disponible Available formats: - S16_LE - S32_LE bash-4.2$

I'm not very knowledgeable about how sound works on Linux and am thus easily baffled. Maybe that's normal but it doesn't seem to me to be the case. The Alsa users mailing list provided no feedback on the subject.
The point is : have your tried to watch your file using another Alsa device than the current one?

[Rémi Denis-Courmont]

Please don't hijack threads.

[rvdboom]

I didn't intend to, I just thought that maybe the initial poster had issues with 24bits PCM because of the same problems with Alsa that I have. But then again, that's probably because I don't understand his problem no more than I understand mine.

[Lubricator]

I have the same problem with a MOV-file.

Stream 0
Type: Audio
Codec: PCM S32 BE (in32) <-- Not exactly as in the topic.
Language: English
Channels: Stereo
Sample rate: 48000 Hz
Bits per sample: 32

Stream 1
Type: Video
Codec: H264 - MPEG-4 AVC (part 10) (avc1)
Language: English
Resolution: 1920x1080
Frame rate: 23.976000
Decoded format: Planar 4:2:0 YUV

Using VLC media player 2.1.2 now. Previous version had the same problem too.

[Jean-Baptiste Kempf]

Please share the file.

[Lubricator]

How? I wouldn't mind sharing it, but the file is copyrighted and pornographic. I tried editing out a short sample, but the video editor I used did reencoding.

BTW, there is audio when I play the movie in the video editor.

[Jean-Baptiste Kempf]

What is the issue with that?
http://streams.videolan.org/upload/

[Lubricator]

What do I enter into the "Trac Ticket" field at http://streams.videolan.org/upload/ or should I leave it blank?

[Lubricator]

Never mind. I finished uploading now and left Trac Ticket blank.

[Jean-Baptiste Kempf]

OK.

[Jean-Baptiste Kempf]

I just fixed it for VLC 2.2.0

[Lubricator]

That's good news. Good job!