Not without something like the Foscam binding that is being discussed.
The way that I am doing it is to use the excellent Linux software “motion” which does support direct RTSP interface (I was using it on my HD Foscams, until I switched to the low level protocol). You need the latest version of “motion” the earlier ones did not support RTSP, and you need FFMPEG as well (motion uses FFMPEG libraries to decode the H.264 video stream).
Once you have motion working (it’s not as hard as it looks!), you can enable it’s MJPEG server, and your RTSP video is converted into MJPEG which can be viewed in a web page.
This is the only way to view live video in a web page. There is no other way without an “app” - like flash, or UTube - or an openhab binding. Most web browsers can view video files (mp4 for example), but that’s not the same thing as viewing live video.
Apple is promoting a way of converting live video into “chunks” of small files that are then fed to a regular web browser (an HTML5 browser like Chrome or Safari). I do this with the HD RTSP feed using FFMPEG, as I get sound etc, but it’s delayed by 20 seconds or so (ie the “chunks” are 5s or so each), I don’t watch this feed, this is what I record. So when motion detects a motion trigger, the file it starts recording is the delayed HD feed (with sound) - so you don’t miss the event that triggers the recording!
The Foscam “plugin” for your browser that allows you to view the video in IE is an “app” like flash that uses the low level protocol to display the video. It’s not using RTSP, and it’s not using your browser to display the images (any more than flash is). That’s why you don’t get anywhere near as good results using anything other than their plugin.
I posted a low level protocol version of motion earlier, and a python low level interface that uses the cameras motion detection to trigger events in openhab (camera send low level protocol code 111 on motion detection. There is a code for audio detection also).
The python script will work as is in Windows, Linux etc (just download and go - it has a command line interface). You can even get video out of it, but it’s pushing python’s limits to get HD video. I have a python script that does facial recognition (not very well).
The motion program you have to compile from the source that I posted.