Red Hat Bugzilla – Bug 861772
Xv video playback in Totem lags audio by several seconds on ATI FirePro V4800
Last modified: 2014-09-13 14:58:29 EDT
Created attachment 619450 [details]
Sysprof output while playing video in Totem
Description of problem:
Test performed for the Fedora 18 Alpha Radeon Test Day.
It is not clear whether this is a Totem issue or ati driver issue, but video playback in Totem lags behind audio by roughly 1 to 2 seconds. Maximizing, minimizing and toggling between the gnome-shell 'Activity' view (via Super key on the keyboard) does not seem to have any effect (positive or negative) on this issue. A sysprof was performed while playing the video in question.
Because some prior bugs (https://bugzilla.redhat.com/show_bug.cgi?id=467267) filed against past Fedora releases, stated that playback in pitivi was normal, this was attempted also. Pitivi video playback does indeed correctly sync the video with the audio while playing the video in question.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
Video lags audio by several seconds throughout video playback on Totem.
Video playback should be smooth and in-sync with audio.
* Video used for this test:
* Smolt profile:
Created attachment 619451 [details]
Xorg.*.log for xv video playback tests
Created attachment 619452 [details]
Output of dmesg for xv video playback tests
Adam, are you able to reproduce it on latest Fedora 18 or 19?
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I observe no such lagging on F21 rawhide with ATI FirePro V4800. Closing now.
Note that the same goes for RHEL7.