static int mxf_get_stream_index(AVFormatContext *s, KLVPacket *klv) { int i; for (i = 0; i < s->nb_streams; i++) { MXFTrack *track = s->streams[i]->priv_data; /* SMPTE 379M 7.3 */ if (!memcmp(klv->key + sizeof(mxf_essence_element_key), track->track_number, sizeof(track->track_number))) return i; } /* return 0 if only one stream, for OP Atom files with 0 as track number */ return s->nb_streams == 1 ? 0 : -1; }