We needed something similar, and I ended up using Lego NXT sensors, and wrote a gstlego element.

The idea is that you emit a light at time0 into a camera, and then you use another sensor to sense the light at time1 on the screen. The accuracy was about +/- 2ms, so if you can live with that, I recommend this approach, since it is both cheap and fun! J


From: liangzhihong1984 [mailto:liangzhihong1984@126.com]
Sent: 27. februar 2009 09:14
To: gstreamer-devel@lists.sourceforge.net
Subject: [gst-devel] How to measure the delay with GStreamer?


I was working on a video conferencing project, and want to get the exact delay form when it was grabbed through the 1394 firewire to being displayed on the screen of another PC in LAN.

Any clue about how to implement this?


Thank you in advance.



Best Regards,

Leon Liang