static int vqf_probe(AVProbeData *probe_packet) { if (AV_RL32(probe_packet->buf) != MKTAG('T','W','I','N')) return 0; if (!memcmp(probe_packet->buf + 4, "97012000", 8)) return AVPROBE_SCORE_MAX; if (!memcmp(probe_packet->buf + 4, "00052200", 8)) return AVPROBE_SCORE_MAX; return AVPROBE_SCORE_EXTENSION; }