MPEG2_EXTENSION_SEQUENCE  361 libavcodec/cbs_mpeg2_syntax_template.c     case MPEG2_EXTENSION_SEQUENCE:
MPEG2_EXTENSION_SEQUENCE   65 libavcodec/mpeg2_metadata_bsf.c                 MPEG2_EXTENSION_SEQUENCE) {
MPEG2_EXTENSION_SEQUENCE  272 libavcodec/vaapi_encode_mpeg2.c         MPEG2_EXTENSION_SEQUENCE;