Comment 3 for bug 1436296

Builds fine on amd64 vivid:

 dpkg-genchanges >../ffmpeg_2.6.1-1_amd64.changes
dpkg-genchanges: including full source code in upload
 dpkg-source --after-build ffmpeg-2.6.1
dpkg-buildpackage: full upload (original source is included)
I: Copying back the cached apt archive contents
I: unmounting dev/pts filesystem
W: Could not unmount dev/pts: umount: /var/cache/pbuilder/build//10360/dev/pts: not mounted
W: Ignored error in unmount
I: unmounting run/shm filesystem
I: unmounting proc filesystem