Poor quality watching Quicktime movies on F18 [SOLVED]

Andre Costa blueser at gmail.com
Fri Mar 22 19:40:09 UTC 2013

Some additional info: according to "running
page, other possible values for CLUTTER_VBLANK are "glx" and "dri". I just
tested and "glx" also seems to work fine for me (NVidia driver with sync to
vblank set to true).



On Thu, Mar 21, 2013 at 1:10 PM, Andre Costa <blueser at gmail.com> wrote:

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