when not using -vc mpegpes with mpegs (I find it unlikely it would only happen on mpegs though))
Using detection code to check if using NTSC or PAL/SECAM and setting appropriate resolution and
GOP-Size based on this information. It now generates a valid mpeg1 stream instead of a hybrid
mpeg2 (with mpeg1 headers).
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@4686 b3059339-0415-0410-9bf9-f77b7e298cf2