GNOME Bugzilla – Bug 654254
Since renaming the qtdemux plugin to isomp4, gstreamer does not play mp4 files.
Last modified: 2011-07-08 14:57:00 UTC
Since package gstreamer-plugins-good has been updated from version 0.10.27 to 0.10.29, Totem does not recognize MP4 files, in Fedora Release 15. A temporary solution is to roll back the updated package.
Could you do this in gnome-terminal or so: $ GST_DEBUG=*:5 gst-launch-0.10 playbin2 uri=file:///path/to/movie.mp4 -v 2>dbg.log $ gzip dbg.log and attach the dbg.log.gz file to this bug ?
When I re-installed the newer version of the gstreamer-plugins-good package, it started working! So, probably, this isn't a bug. Thanks for the help and sorry for the trouble.