[mythtv-users] MythMusic skipping on OGG files

[James Smith]

> On 05/04/2005, at 7:47 AM, James Smith wrote:
>> On Mon, 2005-04-04 at 22:58 +0930, Matthew Phillips wrote:
>>> On 04/04/2005, at 10:15 PM, James Smith wrote:
>>>> Hi all,
>>>>
>>>> I've just got MythTV installed happily, and am very pleased so far.
>>>> I'm
>>>> having a problem with MythMusic though - it seems to be reporting
>>>> track
>>>> lengths wrong (generally 20 seconds or so too long), and often skips
>>>> ahead
>>>> a few seconds at random while playing. Most of my music is in OGG
>>>> format,
>>>> so it may be something specific to this format, I'm not sure. Anyone
>>>> come
>>>> across anything like this?
>>>
>>> My post of a few days ago ("MythMusic playback speed too fast") is
>>> probably related - I'm seeing  a similar thing for mp3 playback minus
>>> the skipping (they just play fast and end early). But I'm pretty sure
>>> it's been happening for a few OGG's in the collection too.
>>
>> I had a bit of a hack around with module options to see if it was the
>> soundcard output bitrate or anything, but with no luck. I tried setting
>> the output bitrate explicitly to 44100Hz, but then everything
>> noticeably
>> slowed down - pitch changed and everything, but the timer on MythMusic
>> still ended a few seconds early, just as before, so I put it back.
>>
>> I'm using the built-in AC97 sound device using the ATI IXP driver, so I
>> put this in modprobe.conf to change the bitrate:
>>
>> options snd-atiixp ac97_clock=44100
>>
>> If you're not getting pitch shifting though, I guess this isn't your
>> problem either...
>
> I'm assuming (perhaps incorrectly?) that if sound is working OK for
> other components of the system (which it is), then this is more likely
> to be related to the mp3/ogg decoders rather than the sound driver.
>
> I haven't had time to look into this properly yet, and indeed I'm not
> even sure where to start playing. Does anyone know where to start
> tweaking the decoders used by MythMusic?

Don't know if the information in this post is still relevant, but maybe it
might point you in the right direction:
http://mythtv.org/pipermail/mythtv-users/2003-April/002234.html

cheers,
-- 
James Smith - james at floppy.org.uk