+ bytestream2_init(&s->gb, avpkt->data, avpkt->size);
+ bytestream2_skip(&s->gb, 8);
+ nb_segments = bytestream2_get_le16(&s->gb);
+ if (nb_segments == 0)
+ return avpkt->size;
+
+ if (7 * nb_segments > bytestream2_get_bytes_left(&s->gb))
+ return AVERROR_INVALIDDATA;
+