[mythtv-users] OSD slow with hardware decoding?

[Mike Wood]

Just to let you know, I'm experiencing the same thing you are.  With 
Hardware decoding enabled, playback works very well, almost flawlessly 
in fact.  But whenever any kind of OSD is on the screen (simple OSD for 
channel change, browse mode, etc...)  then my playback stutters and I 
get lots of "prebuffering pauses" in the log file.  Unfortunately, I'm 
not a programmer so I'm useless to try and fix this myself.  But I 
understand Isaac has decided not to support this functionality, so its 
up to the users to track this issue down...if that's possible.  If 
someone else is working on it, and needs my assistance as a tester, let 
me know.  If this could be worked out, my Myth box would get even closer 
to nirvana!  :-)

By the way, setting the OSD fade to 0 certainly helps....but its still 
not perfect.

Mike




Isaac Richards wrote:

>On Monday 01 December 2003 07:48 pm, Curtis Stanford wrote:
>  
>
>>I have finally got hardware mpeg2 decoding (CLE266) working with my EPIA 
>>M10000 box and, for the most part, it works pretty well. It cuts down CPU 
>>usage to 20-30% and allows me to watch higher resolutions and higher 
>>bitrates. The weird thing is that any OSD makes the video pause and stutter
>>
>>    
>>
> something terrible, especially when it's fading away.
>  
>
>>The OSD works much better using software decoding even though much less CPU
>>is 
>>    
>>
> available. With 70-80% CPU available using hardware decoding does
>  
>
>>anyone have any ideas why the OSD suffers so badly? Is it a buggy driver or
>>just the nature of the beast?
>>    
>>
>
>I just figured that the cle266 didn't like being updated very often with new 
>OSD frames and never really looked into it.  As I use a pvr-350 in my epia-m 
>box now, I doubt I'll be looking into it in the future.
>
>  
>
>>And, while I'm at it, why is the OSD black and white using hardware
>>decoding? 
>>    
>>
> I've seen reference to the problem in the mailing list archives
>  
>
>>but haven't seen a reason why. Is this a dead end or is it something that
>>needs a warm body to work on it?
>>    
>>
>
>The hardware is limited to 16 colors for the OSD.  16 shades of grey looks 
>best with that, 16 colors would look horrible.
>
>Isaac
>
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