wavparse: Skip id3 tag

Skip id3 tag during wav parse.

https://bugzilla.gnome.org/show_bug.cgi?id=721241
v4l2: Handle v4l2_ioctl() errors even in error handling

Fixes https://bugzilla.gnome.org/show_bug.cgi?id=721268
matroskamux: Use the running time for container timestamps, not buffer timestamps

Buffer timestamps have no real meaning here, and for selecting the next
buffer we already use the running time anyway.
matroskamux: Add missing semicolon from last commit