List of known non-Clapper issues and patches

[Rafostar]

Known non-Clapper issues

This is an up-to date list of issues (without a fix yet) that are not caused by Clapper, but affect the application in a bad way. Any help with debugging and resolving them would be appreciated:

GTK 4.14

• gtkscale: Adding marks on both sides makes scale grow in size - gtk/-/issues/6639

GStreamer

• External subtitles out of sync after doing fast (keyint) seek - gst-plugins-base/-/issues/891
• Playbin3 does not work with assrender - gstreamer/-/issues/1081 - fixed in 1.24.0
• Disabling video track has no effect when file has subtitles - gst-plugins-base/-/issues/910
• Videos with subtitles in DVD format fail when hardware acceleration is enabled - gst-plugins-bad/-/issues/78 - fixed in 1.23.1
• PipeWire audio sink occasionally breaks seeking - gstreamer/-/issues/912
• dashdemux2: Last subfragment in On-Demand streams does not play - gstreamer/-/issues/1979

X11 Only

• Random crashes with app received an X Window System error - gst-plugins-good/-/issues/782

Flatpak version patches

This is a list of bugs/features that are fixed/added through patches in the Flatpak app version:

GStreamer Base

• subparse: Autodetect external subtitles files character encoding - gstreamer/-/merge_requests/1204
• gl: Workaround crashes in adaptive streaming on Intel GPUs - mesa/-/issues/3029 - seems fixed nowadays

GStreamer Good

• matroska: Fix attachments (e.g. fonts) detection - needs some more work before sending as MR
• matroska: Treat non-image structure as attachment and set mimetype (fixes detection of attachments without file extension) - gst-plugins-good/-/merge_requests/858 - merged, in 1.19.3
• matroska: Copy index table when updating track info (fixes temporary video corruption after seek on some mkv videos) - gst-plugins-good/-/merge_requests/978 - merged, in 1.19.90
• matroska: Support seeking to nearest keyframe gstreamer/-/merge_requests/1202
• dashdemux2: Improve initial representation selection gstreamer/-/merge_requests/3894 - merged, in 1.23.1

GStreamer Bad

• assrender: Fix ass subtitles smooth scaling - gst-plugins-bad/-/merge_requests/1822 - merged, in 1.19.3
• assrender: Fix attachment mimetype detection - gst-plugins-bad/-/merge_requests/1967 - merged, in 1.19.3
• assrender: Add "application/vnd.ms-opentype" mimetype detection - gst-plugins-bad/-/merge_requests/1968 - merged, in 1.19.3
• assrender: Support RFC8081 mime types - gstreamer/-/merge_requests/1481 - merged, in 1.19.90
• vah264dec: Fix crash when seeking on some videos - gst-plugins-bad/-/merge_requests/1809 - merged, in 1.19.1
• dashdemux: Fix segmentBase type with 'sidx' not using range download issue - gst-plugins-bad/-/issues/619

GStreamer VAAPI

• glx: Iterate over FBConfig and select 8 bit color size (fixes the "unfixable" orange/reddish X11 video issue described on https://linuxreviews.org/Chromium#Issues) - gstreamer-vaapi/-/merge_requests/410 - (backported to 1.18.4)