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RTSP in HTML5 with low latency

For IP camera, low latency is very important, the best latency is about 300ms to 400ms, and RTSP(Real Time Streaming Protocol) is a best protocol for IP camera, all the IP camera has web interface, so the web interface need support video live view. and in IE and old version Chrome/Firefox/Safari support plugin, so most IP camera manufacturer will develop plug-in for IE and Chrome, IE has ActiveX, Chrome/Firefox/Safari has NPAPI interface. And Flash in another plug-in, some application also use RTMP for Flash to play video in HTML5.