[mythtv-users] Struggling with DVB-T and AC3

[Kent Williams]

I'm keen to hear about anyone who has had success with this too,
especially anyone around Sydney, AU.

Using ASLA:iec958 in myth, and leaving the AC3 passthrough checkbox
unchecked, normal stereo works through the optical output. When using an
AC3 PID, all I get is a bunch of 'blips'. If I enable the checkbox, I
don't get any audio on the optical output at all for stereo or AC3
streams, although the amp does seem to show some signs of life when
going into livetv (just a short click and nothing after that).

Using Ogle for dvd playback, 5.1 works fine through the optical output.

I'm also using ALSA 1.x with a SB Live (not platinum), 2.6.3 kernel and
Myth CVS from a few weeks after the 0.14 release.

-Kent

> -----Original Message-----
> From: Mark Edwards [mailto:mark at edwards.homelinux.net]
> Sent: Tuesday, 9 March 2004 12:18 AM
> To: Discussion about mythtv
> Subject: [mythtv-users] Struggling with DVB-T and AC3
> 
> Can anyone point me to a HOWTO in respect of getting the AC3 PID
sending
> digital out to my 5.1 amp? I have setup the DVB channels
> with the channel editor, and I have put the AC3 PID in the audio slot
> (replaced the standard audio PID). Things seem to be going OK
> with the normal audio PID, but not with the AC3 pid.
> 
> I'm using ALSA 1.x libraries, EMU10K1 alsa driver (SB LIVE Platinum
with
> breakout box). the connector I'm using is the TOSLINK or
> the RCA SPDIF on the breakout box. This seems to work OK with xine,
> although mplayer doesn't seem to work at all : mpalyer ... -ac
> hwac3 just ends up giving me a codec error.
> 
> So, I'm putting ALSA:iec958 in the general TV settings for the audio
> device, but I get all sorts of errors when MythTV tries to open
> the device. Yes, I have checked the AC3 passthrough checkbox. most of
the
> time - the errors relate to a sampling rate error - it's
> asking for one value (the value in the 0.1 stream) but getting 0Hz
back.
> After a few goes, it completely fails to open the audio
> device.
> 
> If anyone has seen this sort of stuff before, please let me know.
> 
> Cheers,
> 
> Mark.