[mythtv-users] Choppy HDTV playback

[Steven Adeff]

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....
>
> This is also the case with LiveTV.
>
> My logs on the backend show
>
> 2007-02-06 07:07:31.236 MainServer::HandleAnnounce Monitor
> 2007-02-06 07:07:31.315 adding: poseidon as a client (events: 0)
> 2007-02-06 07:07:31.317 MainServer::HandleAnnounce Monitor
> 2007-02-06 07:07:31.318 adding: poseidon as a client (events: 1)
> 2007-02-06 07:07:32.365 MainServer::HandleAnnounce Playback
> 2007-02-06 07:07:32.397 adding: poseidon as a client (events: 0)
> 2007-02-06 07:07:32.425 MainServer::HandleAnnounce FileTransfer
> 2007-02-06 07:07:32.429 adding: poseidon as a remote file transfer
> 2007-02-06 07:07:34.364 MainServer::HandleAnnounce Playback
> 2007-02-06 07:07:34.424 adding: poseidon as a client (events: 0)
> 2007-02-06 07:07:34.426 MainServer::HandleAnnounce FileTransfer
> 2007-02-06 07:07:34.427 adding: poseidon as a remote file transfer
> 2007-02-06 07:07:36.616 MainServer::HandleAnnounce Playback
> 2007-02-06 07:07:36.742 adding: poseidon as a client (events: 0)
> 2007-02-06 07:09:37.817 MainServer::HandleAnnounce Playback
> 2007-02-06 07:09:37.981 adding: poseidon as a client (events: 0)
> 2007-02-06 07:09:38.152 MainServer::HandleAnnounce FileTransfer
> 2007-02-06 07:09:38.253 adding: poseidon as a remote file transfer
> 2007-02-06 07:09:39.297 MainServer::HandleAnnounce Playback
> 2007-02-06 07:09:39.431 adding: poseidon as a client (events: 0)
>
> which indicates that the frontend (poseidon) is restarting the transfer
> every two seconds....
>
> 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.

-- 
Steve
Before you ask, read the FAQ!
http://www.mythtv.org/wiki/index.php/Frequently_Asked_Questions
then search the Wiki, and this list,
http://www.gossamer-threads.com/lists/mythtv/
Mailinglist etiquette -
http://www.mythtv.org/wiki/index.php/Mailing_List_etiquette