diff options
Diffstat (limited to 'libavformat/rtsp.c')
| -rw-r--r-- | libavformat/rtsp.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/libavformat/rtsp.c b/libavformat/rtsp.c index d4ab8f28bf..f294d0ec24 100644 --- a/libavformat/rtsp.c +++ b/libavformat/rtsp.c @@ -1438,7 +1438,7 @@ 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]; @@ -1457,9 +1457,11 @@ 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 >= 4) { 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]; |