Bug 249911 – [GStreamer] YouTube video doesn't display next frame but audio progresses.

• Status: RESOLVED
• Resolution: REMIND
• Component: WebKitGTK

Created attachment 464227 [details]
Contains a video showing the bug and a log file

Overview: YouTube video dosen't display the next frame.

Steps to Reproduce: This is has been happening with any YouTube video I watch using Epiphany as of late.

Actual Results: Plays the video and audio when playing it after replaying after reloading the page. If I scroll to the scrollbar and click at a certain point in the video, it stays at the frame but audio progresses.

Expected Results: Play the video as it how it would play normally with the problem absent.

Build Date and Hardware: 2022-12-22 on PC.

Additional Builds and Platforms: Video plays without any problem on Firefox 108.0.1 on Linux.

[Philippe Normand]

Video looks frozen likely because of an issue with your nvidia vp9 decoder.

Can you check if this video plays with a standalone GStreamer player?

gst-play-1.0 -v https://test-videos.co.uk/vids/bigbuckbunny/webm/vp9/1080/Big_Buck_Bunny_1080_10s_1MB.webm


Please also try with the --use-playbin3 option.

Created attachment 464257 [details]
The verbose ouptus of the commands before and after using --use-playbin3 option.

Comment on attachment 464257 [details]
The verbose ouptus of the commands before and after using --use-playbin3 option.

Well, it plays without any problems.

[Philippe Normand]

Yes but in this case the selected video sink is not rendering GL textures. Can you try the gst-play commands with --videosink glimagesink ?

Created attachment 464266 [details]
A video recording of the rendering by OpenGL.

It does play without any problems

[Philippe Normand]

Please provide logs, see https://github.com/Igalia/meta-webkit/wiki/Providing-useful-GStreamer-Zero-copy-issue-reports#in-webkit

Created attachment 464281 [details]
Verbose outputs of the gst commands before and after --use-playbin3 option.

Gstreamer version : 1.20.5.
GPU hardware: NVIDIA GTX 1660. Driver version: 525.60.11.
I was using the flatpak version of Epiphany so I don't know which Gstreamer plugins were installed as dependencies for the browser

[Philippe Normand]

The logs I need are for the Ephy runtime, not gst-play.

GST_DEBUG=... GST_DEBUG_FILE=... epiphany ...

Created attachment 464290 [details]
Commands supplied to flatpak and the output of those commands

The commands supplied to flatpak and the ouputs of those commands are in the file.

If I include the browser tag, it gives me this output:
bash: browser: No such file or directory

[Philippe Normand]

Type this:

flatpak run --env="GST_DEBUG=3,webkit*:6" --env="GST_DEBUG_FILE=gst.log" --filesystem=home   --user org.gnome.Epiphany.Devel

flatpak run --env="GST_DEBUG=3,webkit*:6" --env="GST_DEBUG_FILE=gst.log" --filesystem=home   --user org.gnome.Epiphany.Devel
error: app/org.gnome.Epiphany.Devel/x86_64/master not installed
[tarun@ktkr-ms7b89 ~]$ flatpak install org.gnome.Epiphany.Devel
Looking for matches…
error: No remote refs found for ‘org.gnome.Epiphany.Devel’

I forgot to mention it. I run an OS based on arch linux.

[Philippe Normand]

I don't know which flavor of Ephy you installed. You can check with flatpak list and adapt the command line accordingly.

Created attachment 464345 [details]
The problem seems to be partially fixed

[Philippe Normand]

Partially?

What's failing now? I can't help if you don't provide the logs.

I am not able to get any logs.
The command: flatpak run org.gnome.Epiphany --env="GST_DEBUG=3,webkit*:6" --env="GST_DEBUG_FILE=gst.log" --filesystem=home   --user org.gnome.Epiphany.
The output: Failed to parse arguments: Unknown option --env=GST_DEBUG=3,webkit*:6

[Philippe Normand]

You typed the app name twice in that command... why?

[Michael Catanzaro]

You're passing the --env arguments to Epiphany rather than to flatpak. That won't work. Try:

$ flatpak run --env="GST_DEBUG=3,webkit*:6" --env="GST_DEBUG_FILE=gst.log" --filesystem=home --user org.gnome.Epiphany

which is what Phil originally suggested, except with org.gnome.Epiphany instead of org.gnome.Epiphany.Devel. That will work if you've installed Epiphany in your user installation. If you've installed it system-wide, then use:

$ flatpak run --env="GST_DEBUG=3,webkit*:6" --env="GST_DEBUG_FILE=gst.log" --filesystem=home org.gnome.Epiphany

(In reply to Philippe Normand from comment #19)
> You typed the app name twice in that command... why?

Because I understood it to be that it would be a user of that application at and this was the case when i tried the command:
error: app/org.gnome.Epiphany.Devel/x86_64/master not installed.

The command worked. In which directory will the logs be stored in?

Created attachment 464439 [details]
Here is the log.

[Philippe Normand]

Can you add this to GST_DEBUG and provide another log file? Thanks!

"videodecoder:8,nvdec:8"

Created attachment 464443 [details]
Here is the second log

[Philippe Normand]

Is this still happening with 2.46.1?

[Philippe Normand]

Ping.

[Philippe Normand]

No reply, closing.