CODEC_ID_GIF      172 libavcodec/gif.c     CODEC_ID_GIF,
CODEC_ID_GIF      330 libavcodec/gifdec.c     CODEC_ID_GIF,
CODEC_ID_GIF       60 libavformat/img2.c     { CODEC_ID_GIF       , "gif"},
CODEC_ID_GIF      156 libavformat/isom.c     { CODEC_ID_GIF,   MKTAG('g', 'i', 'f', ' ') }, /* embedded gif files as frames (usually one "click to play movie" frame) */
CODEC_ID_GIF       82 libavformat/matroska.c     {"image/gif"                  , CODEC_ID_GIF},