[FFmpeg-devel] [PATCH] mpegts: prevent division by zero

[Andreas Cadhalpun]

Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun at googlemail.com>
---
 libavformat/mpegts.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/libavformat/mpegts.c b/libavformat/mpegts.c
index fad10c6..77d63f2 100644
--- a/libavformat/mpegts.c
+++ b/libavformat/mpegts.c
@@ -2692,6 +2692,10 @@ static int mpegts_read_header(AVFormatContext *s)
         /* NOTE1: the bitrate is computed without the FEC */
         /* NOTE2: it is only the bitrate of the start of the stream */
         ts->pcr_incr = (pcrs[1] - pcrs[0]) / (packet_count[1] - packet_count[0]);
+        if (ts->pcr_incr <= 0) {
+            av_log(s, AV_LOG_ERROR, "invalid pcr increment %d\n", ts->pcr_incr);
+            return AVERROR_INVALIDDATA;
+        }
         ts->cur_pcr  = pcrs[0] - ts->pcr_incr * packet_count[0];
         s->bit_rate  = TS_PACKET_SIZE * 8 * 27000000LL / ts->pcr_incr;
         st->codecpar->bit_rate = s->bit_rate;
-- 
2.10.2