*Ing. Marco A. Pérez López* Software Development
Xanatos Marine Ltd. #370 18 Gostick Place North Vancouver, B.C., V7M 3G3 Phone: +1 604 904 2200 www.xanatosmarine.com <http://www.xanatosmarine.com/> This electronic transmission (including any and all attachments) is intended solely for the use of the individual or entity to which it is addressed and may contain information that is privileged and/or confidential. If you are not the intended recipient of this electronic transmission, you are hereby notified that any disclosure, copying, or distribution, or the taking of any action in reliance upon the contents of this electronic transmission, is strictly prohibited, and you are further requested to purge this electronic transmission and all copies thereof from your computer system. I am building an application where several clients should be able to watch a video stream from a CCTV IP camera. I think that the best solution bandwidth-wise is to have a single computer in the network connect to the rtsp stream from the camera, and then broadcast this stream via UDP (to some address like 255.255.255.255) so all other computers in the network only need to "tap" that UDP port to get the video stream. I implemented this with VLC and it works, but... as the network gets more load from several devices, the VLC instances start falling behind the real time stream from the camera. With one Full HD camera and four standard cameras in the network, VLC (the "source" or re-streaming instance mainly) falls behind at an astonishing rate and after some 10 minutes the output stream is like 5 minutes behind real time! Looking for an alternative to VLC, I have tried to use LIVE555 to replace VLC in its "server" end but I haven't found an example or a discussion on how to implement UDP broadcast with it. Is this possible? Where should I look? Are there any examples? Will using LIVE555 solve the growing latency problem or is it inherent to the way RTSP/RTP work? Thanks, Marco
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