(In reply to Jeff Muizelaar [:jrmuizel] from comment #4) > It seems like there were a number of reporters that also had trouble on Win11: https://www.reddit.com/r/firefox/comments/115mdtn/hardware_acceleration_results_in_stuttering_video/ [D170311](https://phabricator.services.mozilla.com/D170311) is going to be backed out by Bug 1818637. I re-checked similar bugs and from the following. Then I wonder if there might be a case that "Pending frames" became longer during video playback with video overlay. And the long pending frames might cause the problem. - https://bugzilla.mozilla.org/show_bug.cgi?id=1792015#c27 DCLayerTree uses a lot of tiles that are merged by DWM. Then the long pending frames might happen depending on the situations with NVIDIA GPUs or with AMD GPUs.
Bug 1817709 Comment 9 Edit History
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(In reply to Jeff Muizelaar [:jrmuizel] from comment #4) > It seems like there were a number of reporters that also had trouble on Win11: https://www.reddit.com/r/firefox/comments/115mdtn/hardware_acceleration_results_in_stuttering_video/ [D170311](https://phabricator.services.mozilla.com/D170311) is going to be backed out by Bug 1818637. I re-checked similar bugs and from the following. Then I wonder if there might be a case that "Pending frames" became longer during video playback with video overlay. And the long pending frames might cause the problem. - https://bugzilla.mozilla.org/show_bug.cgi?id=1792015#c27 - https://searchfox.org/mozilla-central/rev/3ede9deb876ad5d6389cb51b371d4a4c8d788deb/gfx/webrender_bindings/RenderCompositorANGLE.cpp#797 DCLayerTree uses a lot of tiles that are merged by DWM. Then the long pending frames might happen depending on the situations with NVIDIA GPUs or with AMD GPUs.