from the 22.Jan.2007 he sent to the mailinglist.
it is a speedup when readding the same file several times:
- it does not change any functionality of jpeg2yuv.
- it does not change jpeg2yuv's command line interface.
- it massively speeds up the generation of stills, when using jpg2yuv
as shown in my first 3 examples. As most users will opt for the
first or second example, this patch will help them.
