I hit this bug on Fedora 28 when using a third-party mesa build. Here's
the ~/.drirc I used to fix this:
<driconf>
<device driver="radeonsi">
<application name="totem" executable="totem">
<option name="allow_rgb10_configs" value="false" />
</application>
</device>
</driconf>
This also fixed the timecode in Totem showing strange, rainbow colors,
caused by the same thing. Repeat the application section as required for
each program affected.
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https://bugs.launchpad.net/bugs/1767312
Title:
[radeon] Totem with gstreamer1.0-vaapi and Xorg: wrong color on H264
videos
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