whose PTS does not start at zero. New code will fix that if the PTS
is more than 100 seconds from zero. This may well not be the right
number, but it is a big improvement over the current state.


git-svn-id: file:///var/local/repositories/ffmpeg/trunk@1297 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b