AV_CODEC_ID_NONE   47 libavcodec/codec_id.h     AV_CODEC_ID_NONE,
AV_CODEC_ID_NONE  165 libavcodec/vp9_superframe_split_bsf.c     .codec_ids      = (const enum AVCodecID []){ AV_CODEC_ID_VP9, AV_CODEC_ID_NONE },