Original commit message from CVS:
* ext/ffmpeg/gstffmpegdec.c: (gst_ffmpegdec_lowres_get_type),
(gst_ffmpegdec_skipframe_get_type), (gst_ffmpegdec_class_init),
(gst_ffmpegdec_init), (gst_ffmpegdec_open),
(gst_ffmpegdec_setcaps), (gst_ffmpegdec_negotiate),
(gst_ffmpegdec_do_qos), (clip_video_buffer), (check_keyframe),
(get_output_buffer), (gst_ffmpegdec_video_frame),
(gst_ffmpegdec_frame), (gst_ffmpegdec_sink_event),
(gst_ffmpegdec_chain):
Make some enums const.
Cleanups, refactoring.
Better video frame clipping.
Timestamp fixe: use timestamp from incomming buffer even if there
is no input framerate given (as this is totally unrelated).