[mythtv-users] Slight stutter on playback, 0.23 on ION 330HT

"Per J. Frøysa" per.froysa at broadpark.no
Mon Oct 25 15:12:58 UTC 2010


Den 25.10.2010 16:15, skrev Richard Shaw:
> On Mon, Oct 25, 2010 at 9:10 AM, "Per J. Frøysa"
> <per.froysa at broadpark.no> wrote:
>> I have had this stuttering when subtitles are enabled (only then) on my
>> 0.23 ION 330HT - from day 1.
>> But, if "Slim" is degrading the quality of the picture - I would rather
>> have it stutter.
>>
>> I have also noticed that stuttering is mentioned
>> inhttp://www.mythtv.org/wiki/VDPAU#What_doesn.27t.3F but this has not
>> been a topic among mythtv-users so I believed until now that I had a bad
>> installation.
>>
>> Rendering some letters of subtitle seems be an expensive operation.
>> Could any of the alternatives below eliminate this problem?
>>
>> A) Is subtitle rendering coded in a separate thread - separate from the
>> VDPAU thread? Could we use realtime priorities?
>> B) Wonder if Gnome has something to do with the rendering - should I use
>> the more lightweight Xcfe?
>> C) Install a clean mythbuntu? Is mythbuntu stuttering as well?
>> D) Compile the .24 trunk on a clean 10.10 with an optimized config file?
>> E) Give up and buy a heftier motherboard for the FE??
> I wish I could give you some specific advise but hopefully what I have
> will help.
>
> If the problem only occurs every few minutes I wonder if it is some
> sort of system service that's waking up on regular intervals? Have you
> already disabled all non-essential services?
>
> Also, while it probably isn't a resource issue, Gnome is a BIG full
> featured DE. Why not try something more light weight? I used XFCE
> early on but I actually like LXDE[1] the most. It's even more light
> weight and I use it on my old Asus 701 netbook as well.
>
> Richard
>
> [1] http://wiki.lxde.org/en/Ubuntu
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Thanks for reply!

Stuttering occurs at every subtitle update/change. The stuttering lenght
(in time) may have something with where in the gop-sequence the subtitle
event is hitting - because it appears to vary a little.

Per





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