From: Andriy Gelman <andriy.gel...@gmail.com>
Fixed by setting port offset to zero when it cannot be computed.
To reproduce:
$ ffmpeg -min_port 32000 -max_port 32001 -i
rtsp://wowzaec2demo.streamlock.net/vod/mp4:BigBuckBunny_115k.mov -f null -
[1] 303871 floating point exception (core dumped)
Signed-off-by: Andriy Gelman <andriy.gel...@gmail.com>
---
libavformat/rtsp.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/libavformat/rtsp.c b/libavformat/rtsp.c
index 25bdf475b3..76efbf42cd 100644
--- a/libavformat/rtsp.c
+++ b/libavformat/rtsp.c
@@ -1446,7 +1446,7 @@ int ff_rtsp_make_setup_request(AVFormatContext *s, const
char *host, int port,
int lower_transport, const char *real_challenge)
{
RTSPState *rt = s->priv_data;
- int rtx = 0, j, i, err, interleave = 0, port_off;
+ int rtx = 0, j, i, err, interleave = 0, port_off = 0;
RTSPStream *rtsp_st;
RTSPMessageHeader reply1, *reply = &reply1;
char cmd[MAX_URL_SIZE];
@@ -1465,9 +1465,11 @@ int ff_rtsp_make_setup_request(AVFormatContext *s, const
char *host, int port,
/* Choose a random starting offset within the first half of the
* port range, to allow for a number of ports to try even if the offset
* happens to be at the end of the random range. */
+ if (rt->rtp_port_max - rt->rtp_port_min > 1) {
port_off = av_get_random_seed() % ((rt->rtp_port_max -
rt->rtp_port_min)/2);
/* even random offset */
port_off -= port_off & 0x01;
+ }
for (j = rt->rtp_port_min + port_off, i = 0; i < rt->nb_rtsp_streams; ++i)
{
char transport[MAX_URL_SIZE];
--
2.31.0
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