[mythtv-users] 32khz AC3 Streams was: Sound problem with AC3 passthrough

[Rob Baumstark]

Sorry for generating so much spam - but a little more info that might
prove to be helpful.  I stumbled into a discussion on the -commit list
about AC3 passthrough, and decided to try a couple more mplayer
options...

'-ao alsa:device=iec958'
  This plays back the audio perfectly, the receiver indicates PCM
48khz.  The video however is sped up to about the speed as the options
in the previous e-mail.

'-ao alsa:device=iec958 ac hwac3'
  This gives the same results as just using '-ac hwac3' - both audio
and video playback too fast.

I also captured a little of the mplayer output from that last test
with '-ac hwac3' on.

Checking audio filter chain for 32000Hz/2ch/ac3 -> 32000Hz/2ch/ac3...
AF_pre: 32000Hz/2ch/ac3
alsa-init: 1 soundcard found, using: iec958
alsa: 48000 Hz/2 channels/4 bpf/65536 bytes buffer/Signed 16 bit Little Endian
AO: [alsa] 48000Hz 2ch ac3 (1 bps)
Building audio filter chain for 32000Hz/2ch/ac3 -> 48000Hz/2ch/ac3...
[format] Sample format big-endian AC3 not yet supported
Couldn't find matching filter/ao format!
Starting playback...