[mythtv-users] [RFC] HD PVR kernel driver and mythtv patches

Janne Grunau janne-mythtv at grunau.be
Tue Jul 27 13:39:06 UTC 2010


On Tue, Jul 27, 2010 at 01:50:12AM -0700, Alan Young wrote:
> 
> I'm going to be away from a PC until this weekend.  I'll pull the git 
> tree when I get back and retest and send my sign offs.    I admit I 
> didn't run them through checkpatch.pl as I didn't think they'd get 
> queued up that quickly.   Thanks for cleaning them up.

You're welcome. Use the hd_pvr/20100726 branch or a newer with the same
name schema.

> I'm curious, what is the buffer problem that you are seeing?

buffers are only moved back to the free list if they become ready. A non
ready buffer will stay at the front of the rec list until streaming is
stopped.

> Yeah, I'd like to avoid changing that default too.  Using the module 
> parameters does not help.

Ok, we could try to change the audio codec to AC3 if SPDIF is specified
as default input. See hd_pvr/20100727

> The default change fixes for me a issue that 
> several people are seeing with mythtv.  For some reason, something goes 
> bad at the start of some recordings and the driver? the HD PVR? or 
> mythtv?  thinks it is recording from a different input or codec.  The 
> video is good, but it ends up having no sound.  In the mythtv logs, the 
> detected audio codec shows audio-aac instead of audio-ac3 when using the 
> SPDIF input.

Maybe ordering problem, i.e. the audio codec has to be changed to AC3
before or/and after the input is changed to SPDIF?

Janne


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