Module: libav Branch: master Commit: e740929a071ab032ffa382e89da69c6ec7cf882c
Author: Martin Storsjö <[email protected]> Committer: Martin Storsjö <[email protected]> Date: Mon Jul 15 16:44:20 2013 +0300 lavf: Make sure avg_frame_rate can be calculated without integer overflow If either of the deltas is too large for the multiplications to succeed, don't use this for setting the avg frame rate. Reported-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind Cc: [email protected] Signed-off-by: Martin Storsjö <[email protected]> --- libavformat/utils.c | 3 +++ 1 files changed, 3 insertions(+), 0 deletions(-) diff --git a/libavformat/utils.c b/libavformat/utils.c index d83c736..80b1ce2 100644 --- a/libavformat/utils.c +++ b/libavformat/utils.c @@ -2355,6 +2355,9 @@ int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options) int best_fps = 0; double best_error = 0.01; + if (delta_dts >= INT64_MAX / st->time_base.num || + delta_packets >= INT64_MAX / st->time_base.den) + continue; av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den, delta_packets*(int64_t)st->time_base.den, delta_dts*(int64_t)st->time_base.num, 60000); _______________________________________________ libav-commits mailing list [email protected] https://lists.libav.org/mailman/listinfo/libav-commits
