When I try to play animated GIFs or videos through Whatsapp Web interface on Epiphany, they play just the first time, further attempts fail (the multimedia controls appears, but are not responsive, and the video/GIF image is replaced by a white square). I am on Fedora 29, these are the relevant packages installed: webkit2gtk3-plugin-process-gtk2-2.22.4-1.fc29.x86_64 webkit2gtk3-2.22.4-1.fc29.x86_64 webkit2gtk3-jsc-2.22.4-1.fc29.x86_64 gstreamer1-libav-1.14.3-1.fc29.x86_64 gstreamer-plugins-base-0.10.36-18.fc27.x86_64 gstreamer1-plugins-ugly-1.14.3-1.fc29.x86_64 gstreamer1-plugins-good-1.14.4-1.fc29.x86_64 gstreamer1-plugins-base-1.14.4-1.fc29.x86_64 gstreamer-0.10.36-18.fc27.x86_64 gstreamer1-1.14.4-1.fc29.x86_64 gstreamer1-plugins-good-gtk-1.14.4-1.fc29.x86_64 gstreamer-plugins-bad-free-0.10.23-47.fc29.x86_64 gstreamer-tools-0.10.36-18.fc27.x86_64 PackageKit-gstreamer-plugin-1.1.12-1.fc29.x86_64 gstreamer1-plugins-bad-1.14.4-2.fc29.x86_64 Please let me know if I can provide any additional info.
This has been happening for at least half a year or so, on normal non-YouTube video elements. It's not reliably reproducible for me but happens maybe 50% of the time.
(In reply to Michael Catanzaro from comment #1) > This has been happening for at least half a year or so, on normal > non-YouTube video elements. It's not reliably reproducible for me but > happens maybe 50% of the time. i.e. this is definitely not specific to Whatsapp.
This is a known bug in the current MSE implementation.
Could it be related to bug #192530? I have a feeling a LOT of our weird problems video problems could be related to that issue.
(In reply to Alicia Boya García from comment #3) > This is a known bug in the current MSE implementation. Any plans to fix it? This is really bad.
(In reply to Michael Catanzaro from comment #5) > (In reply to Alicia Boya García from comment #3) > > This is a known bug in the current MSE implementation. > > Any plans to fix it? This is really bad. Yes. I'm taking this in mind in my rework of the playback pipeline, but that is a long task.
Is this really a MSE issue? At least audios are played using <audio> here, over blob: URIs. See bug 211627.
Created attachment 399252 [details] Patch
Committed r261680: <https://trac.webkit.org/changeset/261680> All reviewed patches have been landed. Closing bug and clearing flags on attachment 399252 [details].
<rdar://problem/63219296>