[mythtv-users] No sound with dvb-t recordings, but ok on others

[David Watkins]

On 24/04/2008, William Kenworthy <billk at iinet.net.au> wrote:
> I have a backend/frontend plus two working frontend only systems.  I am
> adding a new frontend which has developed a weird sound problem. The
> backend has a bt848 encoder plus a dvb-t card
>
> The new system has sound with the bt848 recordings, but not with the
> dvb-t recordings.  The recordings play fine on the other systems.
>
> The recordings have an ac3 and an mp3 component - selecting either from
> the menu makes no difference - defaults to ac3.  Running mythfrontend in
> a terminal shows no errors as the codecs are selected.
>
> Where is the best place to look for a cure?

It's pretty much impossible not to record the sound with DVB because
the soundtrack(s) are compressed into the data stream.

The most likely options (to me) are:

1)  Your frontend player has selected the wrong (ie an empty)
soundtrack.  Like DVDs, DVB has the potential to carry several
soundtracks: multiple languages, commentaries etc.  Often the unused
tracks are silent but this doesn't always stop the player selecting
them.  Maybe one of your frontends is using a different player or
player settings.  Try cycling through available soundtracks (available
from the menu when watching using the myth internal player).

2)  Mixer settings.  Maybe DVB recordings uses a different channel on
the mixer, which has been accidently muted.