- do not uninitialize video encoder between files
- checks for image size & format change moved from mencoder.c to vfilters
by Oded Shimon <ods15@ods15.dyndns.org>
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@14879 b3059339-0415-0410-9bf9-f77b7e298cf2