[FFmpeg-cvslog] avformat/lvfdec: check stream count during probing

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michaelni at gmx.at> | Fri Nov  8 17:03:42 2013 +0100| [f8a9cf77040e1b2ed83206269ead11aa30afb98d] | committer: Michael Niedermayer

avformat/lvfdec: check stream count during probing

Fixes probetest failure

Signed-off-by: Michael Niedermayer <michaelni at gmx.at>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=f8a9cf77040e1b2ed83206269ead11aa30afb98d
---

 libavformat/lvfdec.c |   10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/libavformat/lvfdec.c b/libavformat/lvfdec.c
index a809c67..d4bad12 100644
--- a/libavformat/lvfdec.c
+++ b/libavformat/lvfdec.c
@@ -25,9 +25,13 @@
 
 static int lvf_probe(AVProbeData *p)
 {
-    if (AV_RL32(p->buf) == MKTAG('L', 'V', 'F', 'F'))
-        return AVPROBE_SCORE_EXTENSION;
-    return 0;
+    if (AV_RL32(p->buf) != MKTAG('L', 'V', 'F', 'F'))
+        return 0;
+
+    if (!AV_RL32(p->buf + 16) || AV_RL32(p->buf + 16) > 256)
+        return 0;
+
+    return AVPROBE_SCORE_EXTENSION;
 }
 
 static int lvf_read_header(AVFormatContext *s)