Hello,
I have the Duahua IPC-HFW2100 and I also have the corrupted screen issue. One caveat is that I am running the firmware mentioned above (2.210.0000.0.R, build : 2013-03-13)
I am running Firefox 22 on a PC.
If I look at the image using the Duahua software the image is fine. I am using the same RTSP url and using FFMPEG