rename *_TYPE to FF_*_TYPE for the external API
allow user specified pict_type
Originally committed as revision 1308 to svn://svn.ffmpeg.org/ffmpeg/trunk
adding AVVideoFrame
moving quality, pict_type, key_frame, qscale_table, ... to AVVideoFrame
removing obsolete variables in AVCodecContext
skiping of MBs in b frames
correctly initalizing AVCodecContext
picture buffer cleanup
Originally committed as revision 1302 to svn://svn.ffmpeg.org/ffmpeg/trunk