When extracting an aux buffer from an MJPG carrier, at
*least* put the original timestamp on it, even if we
fail to apply any other timestamp (which we always do
at the moment, because the timestamp calculating code
was never finished). Apply a DTS using the camera
supplied delay value as well, assuming that there's
no re-ordering going on (there isn't in the C920,
which is really the only extant camera doing this
stuff) and a warning if that turns out not to be true.
It appears that the Logitech C920 sometimes drops the next
to last segment of RAW aux data contained within the MJPEG
container. H264 data that is multiplexed with in the same
container does not appear to be affected. This appears to
be a bug in the Logitech C920 firmware and uvch264src should
not error out in this case.
Sometimes it can take 24 hours of continuous streaming for
the problem to occur, but sometimes it takes only a couple
of hours.
https://bugzilla.gnome.org/show_bug.cgi?id=706276
