[mythtv] live TV stuttering

Hamish Moffatt hamish at cloud.net.au
Wed Apr 7 00:01:37 EDT 2004

On Tue, Apr 06, 2004 at 05:55:21PM +0100, Ed Wildgoose wrote:
> This is DVB right.  This is a known issue and is probably sound card 
> related.

Yep it's DVB.

> I think if you test you can demonstrate that if you start tv on a 
> channel with a 48Khz audio signal and then move to one with a 32Khz 
> signal you will be OK.  But if you start livetv on a 32Khz channel and 
> then move to a 48Khz channel it will start to stutter.
> Clear as mud?  Your mileage may vary and perhaps you can't ever cleanly 
> switch between 48Khz and 32Khz audio modes...?  In my case it is only a 
> problem if I start up with a 32Khz mode.  I speculate that the audio 
> device is only opened once, and rate changes downwards work, but not 
> upwards on my card...  However, I haven't had time to investigate - 
> perhaps someone could add some debugging into audiooutputoss.cpp and see.

I think you're on the right track. I'll start some debugging.
Our local TV networks have cancelled all their interesting programming
for the next two weeks (school holidays) leaving plenty of time for
hacking ;-)

For reference I'm using the i810 audio driver on an nForce2 motherboard.

Hamish Moffatt VK3SB <hamish at debian.org> <hamish at cloud.net.au>

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