[mythtv-users] ac3 passthrough problems

[Richard Krehbiel]

On 10/1/06, Scott <list-mythtv at bluecamel.eml.cc> wrote:
>
>
> On Sep 30, 2006, at 10:07 PM, Richard Krehbiel wrote:
> > It says: "aplay: main:547: audio open error: No such file or
> > directory".  aplay -v says nothing more.
>
> So, did you actually look and see if /usr/share/sounds/alsa/
> Front_Left.wav exists? :)  I'm unclear if the error aplay is giving
> you is because the file doesn't exist on your system or if it is
> because of some other problem.


I had checked that first.  Yes, it exists.


> PCM doesn't look "mute-able."  Pressing M with PCM selected does
> > nothing.
> > Oh - IEC958 *was* muted.
> > Sadly, aplay Left_Front.wav still says "aplay: main:547: audio open
> > error: No such file or directory".
>
> Unmuting IEC958 was progress. For me it's both unmuted and the vol is
> set to 100. I've read elsewhere that setting the vol level on the
> IEC958 isn't really important. I took the "safe" road and set it to
> 100 and that works for me.


In allamixer, my IEC958 doesn't have a volume slider.  Hm.

Your aplay -L output indecates you still have an asoundrc file
> somewhere. Check in ~/.asoundrc and /etc/asoundrc and remove it for now.


I don't have a ~/.asoundrc or /etc/asoundrc.  I did have an
/etc/asound.conf, which I just hid (rename it to .hide).  Nothing's
different.  From aplay -v -D spdif I get: "aplay: main:547: audio open
error: No such file or directory".


Try again with mplayer: "mplayer -v -ao alsa -afm hwac3 -
> monitoraspect 16:9 -dvd-device /dev/cdrom dvd://1" and let us know
> about the .wav file error. Also, what distro is this?
>

mplayer still gives no audio.

==========================================================================
Trying to force audio codec driver family hwac3...
Opening audio decoder: [hwac3] AC3/DTS pass-through S/PDIF
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, 192000 bps, 48000 Hz
AUDIO: 48000 Hz, 2 ch, ac3, 192.0 kbit/12.50% (ratio: 24000->192000)
Selected audio codec: [hwac3] afm: hwac3 (AC3 through S/PDIF)
==========================================================================
Building audio filter chain for 48000Hz/2ch/ac3 -> 0Hz/0ch/??...
[libaf] Adding filter dummy
[dummy] Was reinitialized: 48000Hz/2ch/ac3
[dummy] Was reinitialized: 48000Hz/2ch/ac3
alsa-init: requested format: 48000 Hz, 2 channels, 100
alsa-init: using ALSA 1.0.11rc2
alsa-spdif-init: playing AC3, 2 channels
alsa-init: using device iec958:{CARD 0 AES0 0x02 AES1 0x82 AES2 0x00 AES3
0x02}
alsa-lib: pcm_hw.c:1217:(snd_pcm_hw_open) open /dev/snd/pcmC0D1p failed: No
such file or directory
alsa-init: playback open error: No such file or directory
Could not open/initialize audio device -> no sound.
Uninit audio filters...
[libaf] Removing filter dummy
Uninit audio: hwac3
Audio: no sound

Fedora Core 5, linux kernel 2.6.17-1.2174_FC5smp.  I've been using Red Hat &
ilk for years, but if a different distro is likely to have more success then
I'm open to that.
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