Original commit message from CVS:
2005-12-05  Andy Wingo  <wingo@pobox.com>

* ext/ffmpeg/gstffmpegdec.c: (gst_ffmpegdec_get_buffer),
(gst_ffmpegdec_frame):
* ext/ffmpeg/gstffmpegdeinterlace.c: (gst_ffmpegdeinterlace_chain):
* ext/ffmpeg/gstffmpegscale.c: (gst_ffmpegscale_chain): Update for
alloc_buffer changes.