Poor quality watching Quicktime movies on F18 [SOLVED]

[Andre Costa]

Some follow up on this: found on this
thread<https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1064095/comments/8>that
setting

CLUTTER_VBLANK=none

makes it a *whole* lot better. In fact, AFAICS the problem is gone -- even
if NVidia driver is still set to sync to vblank. Other performance problems
which were also very noticeable on GNOME 3.6 (eg. moving windows around)
are also gone.

Not sure if this is a GNOME or a NVidia bug (or both), will dive deeper
into it later.

Regards,

Andre


On Wed, Feb 6, 2013 at 9:20 PM, Andre Costa <blueser at gmail.com> wrote:

>
> On Wed, Feb 6, 2013 at 5:03 PM, Joe Zeff <joe at zeff.us> wrote:
>
>> On 02/06/2013 04:26 AM, Andre Costa wrote:
>>
>>> Quite the contrary: this is a 8-core i7 desktop with a GeForce GT9800.
>>> It should handle any videos just fine ;-) (as it always has done until
>>> F18). There's clearly something wrong, I just don't know exactly what it
>>> is. CPU usage doesn't spike too much while watching videos
>>>
>>
>> Have you tried running top in a terminal while this is going on?  It
>> can't hurt to know what process is using most of your CPU time when the
>> videos slow down.
>
>
> Thks Joe, I'll try that. But it doesn't look like it's a high CPU usage
> issue, it looks as if video decoding is buggy.
>
> I just tested getting rid of totem-mozplugin and installing
> gecko-mediaplayer (which uses MPlayer). Firefox is now able to play videos
> just fine, so it does seem to be some issue with Totem (or, more
> specifically, GStreamer?). However, gecko-mediaplayer doesn't get along
> well with Chrome, it simply can't load the plugin. So, either I switch back
> to Firefox or I use it only when I want to watch Quicktime movies.
>
> Damn :-/
>
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