[mythtv-users] Choppy Video on Playback and LiveTV, not with mplayer

[Stephen Atkins]

Stephen Atkins wrote:

> Nick wrote:
>
>> On 22/09/05, Lee Koloszyc <teething12 at hotmail.com> wrote:
>>  
>>
>>> Hello all,
>>>
>>> I am having a problem with mythtv 0.18.1 on Gentoo kernel 2.6.12-r10 on
>>> both livetv and playing pre-recorded videos.
>>> The play back is supper choppy and pauses about every 2 seconds.
>>> Playing the same file directly through mplayer or gmplayer and it runs
>>> as smooth as butter.
>>> The recording works fine though even while recompiling X in the 
>>> background.
>>> I am running on a somewhat slow system: P3 800, VT6x4 mother board, 
>>> 512M
>>> ram, Radeon 9250 256mb, PVR150, SBLive.
>>> I am using the ATI binary drivers 8.16.20.
>>> I also had the same problem with an Nvidia FX5200 card in the system,
>>> but had to return the card because of less then desirable svideo 
>>> output.
>>>
>> I've got the same problem with a PVR250 (not mce).  I've noticed in 
>> my myth logs that my system is trying to load the vidia sync but I 
>> don't know how to get it to stop trying.  Doing some searching on the 
>> net it seems the problem could be the OpenGL vsync option when 
>> compiling with Gentoo emerge.  I'm currently recompiling with a 
>> modified use flags of +xv -opengl mmx sse.  I'm also using a ati 
>> (radeon 7500) and I double checked my alsa drivers and they are up to 
>> date.  After this I'm not sure where to go.  I originally thought it 
>> might be IVTV but as it plays fine in mplayer I'm sure its a 
>> Myth/Xorg config problem.
>

Okay everyone I think the problem has been solved and I didn't need to 
recompile anything.  I don't know if this will work for Lee.  I change 
the video stream type from MPEG2-TS to MPEG2-PS and it started working 
properly.  As MPEG2-TS was the default when I first had things setup I 
didn't think about changing it.  What made me change it was I hit a site 
that gave some setting to record into DVD/SVCD/VCD with out having to 
transcode them.  I figured I'd give them a try as I didn't think I could 
screw this thing up any more.

Does someone know of a site that explains the differences between all of 
these settings and why you would want to use one over another (other 
than the problems I was having).

Stephen