FLV_CODECID_SCREEN   82 libavformat/flvdec.c         case FLV_CODECID_SCREEN: vcodec->codec_id = CODEC_ID_FLASHSV; break;
FLV_CODECID_SCREEN   31 libavformat/flvenc.c     {CODEC_ID_FLASHSV, FLV_CODECID_SCREEN},