[mythtv-users] N00b question about video playback
Erich Beckmann
void at gourmetgeek.com
Wed Jul 20 16:27:35 EDT 2005
All,
Well. I think I might have identified part of the problem. I had a
very minimal make.conf, specifically the USE variable.
I am now recompiling everything from X back up to mplayer with stuff
like "nvidia" turned on and a bunch of codec stuff. I assume this will
make a noticeable difference.
I just can't believe that a card and processor that I used to play
movies on three years ago can't handle the same encoding, especially at
a resolution of 640x480.
After I get this squared away, I think the next task is going to be
tuning the output to the TV so it's not so hard to look at it without
getting a migraine.
Ongoing thanks to everyone who has been helping.
Sincerely,
Erich
chris at cpr.homelinux.net wrote:
>On Wed, Jul 20, 2005 at 09:26:30AM -0400, Erich Beckmann wrote:
>
>
>> When I try to playback a lot of my movie files, the playback is very
>>jerky. Is there somewhere I can look to tweak the settings of Mplayer to
>>get the playback to be smoother? OR What is the recommended way to go
>>about configuring the string to launch Mplayer?
>>
>>
>
>You should probably start by clearly identifying the bottleneck. The
>big four on a MythTV system will be hard drive speed (transfer rate,
>DMA), network speed (on split front/back systems), video output limits
>and CPU usage.
>
>For example, instead of running TV capture and playback at full screen
>sizes on high resolution, make sure the recorder is idle and then do a
>playback into a 320x200 window. If the playback stops stuttering then
>your hard drive and/or network are keeping up and the problem is in
>computation. If it still stutters then you have a transport problem.
>
>Of course the resolution of the display also plays a role, but the
>difference can sometimes be counter-intuitive. One of my front-end
>machines uses an LCD display rather than TV-out. On that machine I get
>*far* better performance if I run MythTV at 1280x1024 resolution than
>at 640x480 resolution. I assume this is because the LCD has to display
>at its native resolution no matter what the computer generates, and the
>video card's hardware accelleration is more efficient at scaling the
>image than the LCD is.
>
>
>
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Erich Beckmann - blackhole account
void at gourmetgeek.com
203.606.0216
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