[Webkit-unassigned] [Bug 197861] [GStreamer] YouTube videos without WebM source available break youtube.com when gstreamer-libav is unavailable

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=197861

--- Comment #4 from Charlie Turner <cturner at igalia.com> ---
(In reply to Michael Catanzaro from comment #2)
> Created attachment 369838 [details]
> screenshot of broken page
> 
> I'm surprised you're not able to reproduce the same breakage.

I get the webm fallback you said doesn't exist for you, so it seems were having quite different experiences!

> I don't know what sort of debug log you'd want. Phil often asks for a GStreamer debug log using environment variables I can never remember. You're welcome to ask for whatever you want.

Let see if GStreamer fails in any way,

GST_DEBUG_DUMP_DOT_DIR=. WEBKIT_DEBUG=Media,Events GST_DEBUG='*:2,webkit*:MEMDUMP' ... your webkit command line ... 2>&1 | tee run.log

After that, please tar up all the *.dot and the run.log file so we can check what might be going wrong there.

> I'm testing with 2.24.1 on Fedora 30 and it breaks as shown. In my flatpak environment, everything is fine. I had assumed gstreamer-libav was the difference; it seemed likely.

Perhaps, I'm running off both trunk webkit and gstreamer. I disabled loading of gstreamer-libav and got the webm fallback on that video, so it's not reproducible for me here.

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