[mythtv-users] HD plays fine, SD jerky video and sound?

[Michael T. Dean]

On 02/07/2008 02:05 PM, aaron wrote:
> On 2/7/08, Mark Hutchinson <mark at onnow.net> wrote:
>   
>> Live tv from mythfrontend, HD channels are fine, SD channels are very
>> jerky with stuttering sound.
>>
>> I have tried many many things.  Ideas on how to diagnose this?  No
>> really anything in the frontend or backend logs.
>> How can SD be harder or more intensive to play than HD?
> This might be way off, but if there's no Xv, Myth will need to do
> software scaling, right? Could it be that it takes more effort to
> scale the SD resolution (which would be something like 720x480) up to
> 1920x1080 than to (decode HD + scale to 1080) ?

It's actually the playback profile he's selected (he's using SVN 
trunk--for the archives, the same will apply as users upgrade to 0.21).  
Covered in the thread 
http://www.gossamer-threads.com/lists/mythtv/users/314849#314849 (though 
the post hasn't hit the archives, yet).  It will be one from me later in 
the thread.

Mike