I installed vaapi, after which the video which worked before failed to play. Totem crashed with:

sys:1: PyGIWarning: Peas was imported without specifying a version first. Use gi.require_version('Peas', '1.0') before import to ensure that the right version gets loaded.
sys:1: PyGIWarning: Totem was imported without specifying a version first. Use gi.require_version('Totem', '1.0') before import to ensure that the right version gets loaded.
No accelerated IMDCT transform found
libva info: VA-API version 0.38.0
libva info: va_getDriverName() returns 0
libva info: Trying to open /usr/lib64/dri/i965_drv_video.so
libva info: Found init function __vaDriverInit_0_38
libva info: va_openDriver() returns 0

(totem:30782): Cogl-WARNING **: driver/gl/cogl-framebuffer-gl.c:983: GL error (1280): Invalid enumeration value


Backtrace:
$ gdb --args totem *.mkv 
GNU gdb (GDB) 7.10-4.mga6 (Mageia release 6)
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Reading symbols from totem...Reading symbols from /usr/lib/debug/usr/bin/totem.debug...done.
done.
(gdb) r
Starting program: /usr/bin/totem Dark.Matter.S01E05.1080p.WEB-DL.DD5.1.H.264-RARBG.mkv
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
[New Thread 0x7fffe6639700 (LWP 30545)]
[New Thread 0x7fffe5e38700 (LWP 30546)]
warning: the debug information found in "/usr/lib/debug//usr/lib64/gio/modules/libdconfsettings.so.debug" does not match "/usr/lib64/gio/modules/libdconfsettings.so" (CRC mismatch).

Missing separate debuginfo for /usr/lib64/gio/modules/libdconfsettings.so
Try: urpmi  /usr/lib/debug/.build-id/d0/9c58282e3946bc5f7cbd459de9db6b18030e4b.debug
[New Thread 0x7fffdeffa700 (LWP 30549)]
[New Thread 0x7fffdce83700 (LWP 30550)]
[New Thread 0x7fffd3dfb700 (LWP 30551)]
sys:1: PyGIWarning: Peas was imported without specifying a version first. Use gi.require_version('Peas', '1.0') before import to ensure that the right version gets loaded.
sys:1: PyGIWarning: Totem was imported without specifying a version first. Use gi.require_version('Totem', '1.0') before import to ensure that the right version gets loaded.
[New Thread 0x7fffcb039700 (LWP 30557)]
[New Thread 0x7fffc6837700 (LWP 30558)]
[New Thread 0x7fffc59c7700 (LWP 30559)]
[New Thread 0x7fffc51c6700 (LWP 30560)]
[New Thread 0x7fffbbffe700 (LWP 30561)]
[New Thread 0x7fffbb7fd700 (LWP 30562)]
No accelerated IMDCT transform found
libva info: VA-API version 0.38.0
libva info: va_getDriverName() returns 0
libva info: Trying to open /usr/lib64/dri/i965_drv_video.so
libva info: Found init function __vaDriverInit_0_38
libva info: va_openDriver() returns 0
[New Thread 0x7fffa3588700 (LWP 30564)]
[New Thread 0x7fffa2d87700 (LWP 30565)]
[New Thread 0x7fffa2586700 (LWP 30566)]
[New Thread 0x7fffa1668700 (LWP 30567)]

(totem:30537): Cogl-WARNING **: driver/gl/cogl-buffer-gl.c:93: GL error (1280): Invalid enumeration value


Program received signal SIGSEGV, Segmentation fault.
clutter_gst_content_paint_content (content=<optimized out>, actor=<optimized out>, root=0x11410c0 [ClutterDummyNode]) at ./clutter-gst-content.c:402
402	            overlay->position.x1 * box_width / priv->current_frame->resolution.width,
Missing separate debuginfos, use: dnf debuginfo-install gstreamer1.0-a52dec-1.4.5-2.mga6.tainted.x86_64 gstreamer1.0-plugins-bad-1.6.0-1.mga6.x86_64 gstreamer1.0-plugins-base-1.6.0-1.mga6.x86_64 gstreamer1.0-plugins-good-1.6.0-1.mga6.x86_64 gstreamer1.0-pulse-1.6.0-1.mga6.x86_64 lib64a52dec0-0.7.4-23.mga5.x86_64 lib64archive13-3.1.2-6.mga5.x86_64 lib64asyncns0-0.8-8.mga5.x86_64 lib64clutter-gtk1.0_0-1.6.4-1.mga6.x86_64 lib64datrie1-0.2.8-3.mga5.x86_64 lib64epoxy0-1.3.1-2.mga6.x86_64 lib64evdev2-1.4.4-1.mga6.x86_64 lib64flac8-1.3.1-3.mga6.x86_64 lib64girepository1.0_1-1.46.0-1.mga6.x86_64 lib64gmime2.6_0-2.6.20-5.mga6.x86_64 lib64gnome-desktop3_12-3.18.0-1.mga6.x86_64 lib64grilo0.2_1-0.2.15-1.mga6.x86_64 lib64grlpls0.2_0-0.2.15-1.mga6.x86_64 lib64gstcodecparsers1.0_0-1.6.0-1.mga6.x86_64 lib64gstgl1.0_0-1.6.0-1.mga6.x86_64 lib64gstreamer-plugins-base1.0_0-1.6.0-1.mga6.x86_64 lib64gstreamer1.0_0-1.6.0-2.mga6.x86_64 lib64json-glib1.0_0-1.0.4-3.mga6.x86_64 lib64json2-0.12-3.mga5.x86_64 lib64lzo2_2-2.09-2.mga6.x86_64 lib64mtdev1-1.1.5-4.mga5.x86_64 lib64orc0.4_0-0.4.23-1.mga6.x86_64 lib64pciaccess0-0.13.4-1.mga6.x86_64 lib64peas-gtk1.0_0-1.16.0-2.mga6.x86_64 lib64peas1.0_0-1.16.0-2.mga6.x86_64 lib64pulseaudio0-7.0-1.mga6.x86_64 lib64pulsecommon7.0-7.0-1.mga6.x86_64 lib64python3.5-3.5.0-4.mga6.x86_64 lib64sndfile1-1.0.25-9.mga5.x86_64 lib64soup2.4_1-2.52.0-1.mga6.x86_64 lib64thai0-0.1.21-3.mga5.x86_64 lib64totem-plparser18-3.10.5-3.mga6.x86_64 lib64txc-dxtn-1.0.1-7.mga5.tainted.x86_64 lib64va1-1.6.1-1.mga6.x86_64 lib64wrap0-7.6-46.mga5.x86_64 python3-3.5.0-4.mga6.x86_64 python3-dbus-1.2.0-13.mga6.x86_64 python3-gobject3-3.18.0-3.mga6.x86_64 vaapi-driver-intel-1.6.1-1.mga6.x86_64
(gdb) bt full

+ Trace 235556