Original commit message from CVS:
2005-11-28  Julien MOUTTE  <julien@moutte.net>

* ext/ffmpeg/gstffmpegenc.c: (gst_ffmpegenc_class_init),
(gst_ffmpegenc_init), (gst_ffmpegenc_getcaps),
(gst_ffmpegenc_setcaps), (gst_ffmpegenc_set_property),
(gst_ffmpegenc_get_property): Add rtp-payload-size property.