[FFmpeg-user] RTP problems

[JULIAN GARDNER]

I have been asked to pull in to channels and reencode them into h264 but i cannot pull both, i can pull either one but not both.

Now the 2 channels are on 239.56.1.1:7500 and 239.56.2.1:7500, the command lines are

ffmpeg -i rtp://239.56.1.1:7500 ....... -f mpegts udp://227.27.0.32:1234

and


ffmpeg -i rtp://239.56.2.1:7500 ....... -f mpegts udp://227.27.1.32:1234

Now there is no problem encoding either channel but if i run both on the same machine i start getting this on the outputs

RTP: dropping old packet received too late160 q=27.0 size=     701kB time=00:00:05.60 bitrate=1025.4kbits/s dup=31 drop=0    
2013-01-22_12:53:43.24130     Last message repeated 456 times
RTP: dropping old packet received too late113 q=29.0 size=     772kB time=00:00:06.46 bitrate= 978.9kbits/s dup=31 drop=0    
2013-01-22_12:53:43.79983     Last message repeated 527 times
RTP: dropping old packet received too late 90 q=28.0 size=     777kB time=00:00:07.04 bitrate= 904.1kbits/s dup=31 drop=0    
2013-01-22_12:53:44.30921     Last message repeated 482 times
RTP: dropping old packet received too late 78 q=31.0 size=     894kB time=00:00:07.52 bitrate= 974.4kbits/s dup=31 drop=0    
2013-01-22_12:53:44.80240     Last message repeated 469 times
RTP: dropping old packet received too late 69 q=30.0 size=     960kB time=00:00:08.06 bitrate= 975.1kbits/s dup=31 drop=0    
2013-01-22_12:53:45.35029     Last message repeated 518 times
RTP: dropping old packet received too late 62 q=30.0 size=    1024kB time=00:00:08.60 bitrate= 974.1kbits/s dup=31 drop=0    

Now if i stop one from running the one left will start working, so it looks like there is some mixing of the 2 streams, so has anybody any ideas. I cannot get the ports changed as these are in use for other purposes.

joolz