[MPlayer-users] No sound with -ac hwac3 -ao alsa1x:spdif on nforce2 card

[Dominique Dumont]

Thomas Kranz <tkran2002 at yahoo.de> writes:

> Mplayer makes with my configuration no problems - maybe it's an alsa or
> pass through problem.

Probably.

Here's the full mplayer command:
  mplayer -v -vo null -aid 129 -ac hwac3, -ao alsa1x:yamaha  dvd://1

And the relevant output of mplayer:
  Forced audio codec: hwac3
  Opening audio decoder: [hwac3] AC3/DTS pass-through SP/DIF
  dec_audio: Allocating 8192 bytes for input buffer.
  dec_audio: Allocating 16384 + 65536 = 81920 bytes for output buffer.
  No accelerated IMDCT transform found
  hwac3: switched to AC3, 448000 bps, 48000 Hz
  AUDIO: 48000 Hz, 2 ch, 16 bit (0x400), ratio: 56000->192000 (448.0 kbit)
  Selected audio codec: [hwac3] afm:hwac3 (AC3 through SPDIF)

So hwac3 is recognized.

  Checking audio filter chain for 48000Hz/2ch/16bit -> 48000Hz/2ch/8bit...
  [libaf] Adding filter dummy 
  [dummy] Was reinitialized, rate=48000Hz, nch = 2, format = 0x00000020 and bps = 2
  AF_pre: af format: 2 bps, 2 ch, 48000 hz, big endian AC3 
  AF_pre: 48000Hz 2ch AC3
  alsa-init: requested format: 48000 Hz, 2 channels, AC3
  alsa-init: compiled for ALSA-1.0.3b
  alsa-spdif-init: playing AC3, 2 channels
  alsa-init: soundcard set to iec958:AES0=0x2,AES1=0x82,AES2=0x0,AES3=0x2
  alsa-init: pcm opened in block-mode
  alsa-init: chunksize set to 1024
  alsa-init: fragcount=16
  alsa-init: got buffersize=65536
  alsa1x: 48000 Hz/2 channels/4 bpf/65536 bytes buffer/Signed 16 bit Little Endian
  AO: [alsa1x] 48000Hz 2ch AC3 (1 bps)
  AO: Description: ALSA-1.x audio output
  AO: Author: Alex Beregszaszi, Joy Winter <joy at pingfm.org>
  AO: Comment: under developement
  Building audio filter chain for 48000Hz/2ch/16bit -> 48000Hz/2ch/8bit...
  [dummy] Was reinitialized, rate=48000Hz, nch = 2, format = 0x00000020 and bps = 2
  [libaf] Adding filter format 
  [format] Sample format big endian AC3  not yet supported 
  Couldn't find matching filter / ao format!
  Starting playback...
  alsa-space: free space = 65536, status=141521432, prepared --
  ==> Found audio stream: 138
  ==> Found audio stream: 128


But still, my yamaha amplifier is silent. No ac3 stream is detected.

Any idea ?

Thanks