[mythtv-users] Choppy HDTV playback

Jarod Wilson lists at wilsonet.com
Thu Feb 8 19:54:55 UTC 2007

Steven Adeff wrote:
> On 2/6/07, Yan Seiner <yan at seiner.com> wrote:
>> OK, I have recording happening!
>> Thank you everyone!
>> I am running 0.20-fixes, and it all seems to be working.
>> I can record on both tuners, and play back - almost.  (Aside: the
>> backend has 4-400GB Seagate SATA drives, and those things are *NOISY*!!!
>> Definitely not recommended for a frontend; with both tuners recording,
>> it sounds like someone is rolling a tin can full of steel balls inside.)
>> Typically I transcode the HDTV recordings down to 720x480 so my other
>> frontends can handle them, but I have two front ends that should be able
>> to handle the full resolution stream.
>> When I try to play them, though, I get very choppy playback - two
>> seconds of play, pause, two seconds of playback, pause....
>> Is that right?  Where do I look?  Backend should be adequate - it barely
>> breaks a sweat.  Poseidon (the frontend) is an Athlon 2800+ with an
>> Nvidia 6200 and DVI out to a 1366x720 LCD panel.  Not enough horsepower
>> there?
> not without XvMC enabled, no. You'll want at least a 3200+ on Poseidon.

Note to self: figure out exactly *why* you can play back both 1080i and 
720p material just fine on a 2600+ w/o xvmc...


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