I can't imagine that Ubuntu freezing is an ffmpeg bug. I guess you meant to file a bug against linux, so I'm reassigning this bug there.
But for this bug report to be useful you have to provide more information, at least excerpts of /var/log/syslog from the time, when the freezing happens. ** Package changed: ffmpeg (Ubuntu) => linux (Ubuntu) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1514233 Title: Ubuntu 15.10 freezes during operation. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1514233/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
