[mythtv-users] Performance problem

[Jonathan Rogers]

Raphael Pooser wrote:
> Jonathan Rogers wrote:
>> Raphael Pooser wrote:
>>   
>>> I would put the problem at none of the above, and move it on to your 
>>> graphics card.
>>> At least when I first installed the drivers for my ATI card, it wasn't 
>>> even using XV, causing it to eat up 60% of the processor just to watch a 
>>> 640x480 stream, and with a software encoder taking about 40% to capture 
>>> it, I was getting pauses exactly like the ones you're getting.  After 
>>> making sure I had XV working, I got around 5% to watch a stream by 
>>> itself, and closer to 50% to watch something live or watch and record at 
>>> the same time.
>>> So I would give your graphics card driver a look.  Are you using fglrx?  
>>> If so, make sure your vendor string for OGL reads ATI and not mesa, or 
>>> XV won't be working either.
>>> I've heard that XV works perfectly when using "ati" in X, but I don't 
>>> think "ati" supports the xpress 200, not 100% sure.
>>> Also, "ati" won't let you use TV out.
>>>     
>> Xvideo and OpenGL are separate features, so checking the OpenGL status
>> doesn't really help for video. If you want to check if Xv is working,
>> simply run the "xvinfo" utility. If Xv is working, it'll show details of
>> the video overlay; if not, it'll say there is no overlay.
>>
>> Jonathan Rogers
> 
> Of course they're not related, but with fglrx if you don't have ATI 
> openGL binaries working then the driver isn't properly installed and xv 
> will not work either.  This is true if you're using fglrx.  So an easy 
> way to check if the module is properly installed and getting loaded is 
> to check the vendor string for OGL.  Are you using an ATI card with 
> fglrx by any chance?
> Raphael

I have a Radeon 8500 in my box. I'm currently using X.org's radeon
driver, but I've used fglrx in the past. I do know that OpenGL can be
broken while Xvideo is working, since the former is complex system
involving X driver, kernel driver, and userspace library, while Xvideo
configuration generally only depends on the X driver.

Jonathan Rogers