Gnome Xwayland, Debian Testing, Intel

STR: Click on the bookmark star in the address bar.
Actual: Preview image only shows the video's background.
Expected: Preview image with video content.

• It works with VAAPI disabled.
• Problem occurs with VAAPI in RDD process, it was fine in content process.

MOZ_DISABLE_CONTENT_SANDBOX=1 mozregression --good 2021-09-14 --bad 2021-12-11 --pref gfx.x11-egl.force-enabled:true gfx.webrender.all:true media.ffmpeg.vaapi.enabled:true -a https://bug1619882.bmoattachments.org/attachment.cgi?id=9149605

7:28.40 INFO: Last good revision: 56a843d9ae1c89aa705eaddf404f8c7ef8af8f58
7:28.40 INFO: First bad revision: 84872badd1c1cb0aefeccfa995074f4b902359ab
7:28.40 INFO: Pushlog:
https://hg.mozilla.org/integration/autoland/pushloghtml?fromchange=56a843d9ae1c89aa705eaddf404f8c7ef8af8f58&tochange=84872badd1c1cb0aefeccfa995074f4b902359ab

84872badd1c1cb0aefeccfa995074f4b902359ab Jeff Muizelaar — Bug 1744037. Set media.rdd-ffmpeg.enabled=@IS_EARLY_BETA_OR_EARLIER@ r=stransky

"first bad" is good when setting media.rdd-ffmpeg.enabled to false (VAAPI is used in content process):
mozregression --repo autoland --launch 84872badd1c1cb0aefeccfa995074f4b902359ab --pref gfx.x11-egl.force-enabled:true gfx.webrender.all:true media.ffmpeg.vaapi.enabled:true media.rdd-ffmpeg.enabled:false -a https://bug1619882.bmoattachments.org/attachment.cgi?id=9149605

bug 1698778 was also bad when trying it out:
mozregression --good 2021-11-23 --pref gfx.x11-egl.force-enabled:true gfx.webrender.all:true media.ffmpeg.vaapi.enabled:true media.rdd-ffmpeg.enabled:true -a https://bug1619882.bmoattachments.org/attachment.cgi?id=9149605

(bug 1743647 disallowed VAAPI in content process.)

We may fail to create GL context somewhere to get the dmabuf surface snapshot.
Can you please attach log of MOZ_LOG="Dmabuf:5, PlatformDecoderModule:5" ?
Thanks.

MOZ_LOG="Dmabuf:5, PlatformDecoderModule:5" mozregression --launch 20220111213255 --pref media.ffmpeg.vaapi.enabled:true -a https://bug1619882.bmoattachments.org/attachment.cgi?id=9149605 -P stdout > 1749623.txt

MOZ_LOG="Dmabuf:5, PlatformDecoderModule:5" mozregression --launch 20220111213255 --pref media.ffmpeg.vaapi.enabled:true -a https://bug1619882.bmoattachments.org/attachment.cgi?id=9149605 -B debug -P stdout > 1749623_debug.txt

with Asan Nightly and old intel VAAPI driver:

[GFX1]: GetAsSourceSurface: ScopedFramebufferForTexture failed.

and a lot of

[Child 11213, MediaDecoderStateMachine #1] WARNING: Decoder=61700005ad00 Decode error: NS_ERROR_OUT_OF_MEMORY (0x8007000e) - mozilla::MediaResult mozilla::FFmpegVideoDecoder<58>::CreateImageVAAPI(int64_t, int64_t, int64_t, MediaDataDecoder::DecodedData &): Unable to get frame by vaExportSurfaceHandle(): file /builds/worker/checkouts/gecko/dom/media/MediaDecoderStateMachine.cpp:3568

Could this just be a duplicate of bug 1743638 / bug 1721617 because this are the STR from bug 1721617 comment 2?

I forgot to mention: The video preview is shown in Asan Nightly (VAAPI is used according to intel_gpu_top), but not in Nightly.