* modules/codec/ffmpeg/video_filter.c, include/vlc_filter.h:
- chroma + resizing video filter (using the filter_t architecture). * modules/codec/ffmpeg/*: - cleanup + small updates. * modules/codec/speex.c, theora.c, vorbis.c: - got rid of pf_header() in the encoder. - store the headers in fmt_out.p_extra (this will break the ogg muxer for now). * modules/codec/libmpeg2.c, modules/codec/ffmpeg/video.c: - added a p_dec->b_pace_control field to signal if the decoder is allowed to drop frames. * modules/stream_out/transcode.c: - heavy cleanup. - re-use video decoder modules and got rid of the duplicated ffmpeg video decoder. - use video filters for chroma conversion and resizing. (a few things are broken now like deinterlacing but I'll repair them asap).