[mythtv-users] Trouble playing AC3-encoded recordings on analog audio

Allen Edwards allen.p.edwards at gmail.com
Sun Aug 31 04:09:23 UTC 2008


On Sat, Aug 30, 2008 at 6:16 PM, kanetse at gmail.com <kane.tse at gmail.com>wrote:

> I have recently set up a new MythTV box to replace an older one that
> couldn't handle HD.  I've noticed that any files with an AC3 audio
> stream have stutter and jumpiness; which dramatically increases after
> using the skip forward or skip back functions in mythfrontend.
>
> The thing is that I'm only using the stereo-out jacks, and not the
> digital out features of my sound card.
>
> I've read from some other threads that this HD choppiness might have
> something to do with a 32kHz to 48kHz conversion that mythfrontend
> does internally?  This might indeed be the case, because when I play
> recordings directly from within xine, everything sounds and works
> well.
>
> If I disable the onboard sound card (in the BIOS), or set mythtv to
> output to NULL, video is smooth (but obviously I can't gauge audio,
> because there is none).  The problem persists when I changed the
> soundcard to a PCI one.  It also persisted when I used the Mythbuntu
> Live CD on completely different computer, a Gigabyte GA-965P-DS3 with
> a Core2Duo.
>
> Any ideas?
>
> Here are the specs:
>
> MythTV-0.21-fixes (from ATrpms)
> Mythbuntu 8.04.1 (also tried with CentOS 5.2 and Fedora 9)
> AMD Athlon 62 X2 5000+
> 2 GB RAM
> GeForce 7200GS
> Gigabyte GA-MA78GM-S2H (AMD 780G)
>
> Thanks!



I say this to everyone, try and delete (rename) ALSA.conf and .asoundrc
There are defaults that work fine.

Allen
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