Viewing NVR files?

vining

I was wondering if there was a way to view .avi files recorded and stored on an NVR. They're stored as .avi and video codec used is MJPEG so I was thinking that it may be possible to download that file onto the master parse out the .avi wrapper to leave only the MJEG file but then I thought there's nothing a TP could do with that since it would need a player capability to read the MJPEG header to determine frame rate, etc. Normally MJPEG viewing on a TP I assume is frame by frame by a server push so it's really only a bunch of stills.

This is impossible isn't it unless I can get the NVR to stream the .avi which after looking at the NVR's web api looks like it may be possible.

ericmedley

If you know the frame rate and you're not dealing with a variable frame rate perhaps you could reconstruct the header needed to get the TPs to work. (not that I would have time to reverse engineer such a thing myself. But it does sound kinda fun)

vining

I don't know about that. I think I would have to dissect the file into individual frames and then show them on the TP as re-animated jpeg stills at the proper frame rate. While doing that would be fun, I don't think it would work well enough to be worth the effort.

Looking at the NVR's api could call a recorded event stream and it will server push the file but I'm not sure how I would go about sending the GET via the TP. I guess if I put the GET string less GET that might work. I think the server will be pushing with the .avi wrapper so I don't know if that can be ignored and the mjpeg portion still used. If I were a betting man I would bet against that working.