oggparseskeleton: Check the overall start time before using it.
authorMichael Niedermayer <michaelni@gmx.at>
Tue, 8 Jan 2013 01:52:15 +0000 (02:52 +0100)
committerMichael Niedermayer <michaelni@gmx.at>
Tue, 8 Jan 2013 01:58:01 +0000 (02:58 +0100)
Fixes division by zero

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
libavformat/oggparseskeleton.c

index f9ad701..b6959a6 100644 (file)
@@ -61,7 +61,7 @@ static int skeleton_header(AVFormatContext *s, int idx)
         start_num = AV_RL64(buf+12);
         start_den = AV_RL64(buf+20);
 
-        if (start_den) {
+        if (start_den > 0 && start_num > 0) {
             int base_den;
             av_reduce(&start_time, &base_den, start_num, start_den, INT_MAX);
             avpriv_set_pts_info(st, 64, 1, base_den);