astdec: improve probing

Signed-off-by: Paul B Mahol <onemda@gmail.com>
12 years ago · 10c8f91341
parent 13c6252536
commit 10c8f91341
1 changed files with 5 additions and 2 deletions
--- a/libavformat/ast.c
+++ b/libavformat/ast.c
@ -26,8 +26,11 @@

 static int ast_probe(AVProbeData *p)
 {
-    if (AV_RL32(p->buf) == MKTAG('S', 'T', 'R', 'M'))
-        return AVPROBE_SCORE_MAX / 2;
+    if (AV_RL32(p->buf) == MKTAG('S','T','R','M') &&
+        AV_RB16(p->buf + 10) &&
+        AV_RB16(p->buf + 12) &&
+        AV_RB32(p->buf + 16))
+        return AVPROBE_SCORE_MAX / 3 * 2;
    return 0;
 }