Hi there. I too have been experiencing difficulties with the nighttime playback speed on my NVR8-7400 with the NHD-818 cameras. I'm guessing we're all still stuck on this one?
Has anyone successfully retimed any footage or discovered how to get third-party players to read the header speed?
I have tried converting my footage in vlc player and changing the fps but to no avail. I have also tried converting the file format to mp4 and this did nothing to the speed.
I think the problem of the variable night vision framerate is compounded by the H.264 format which, from what I have read on the web, seems a bit quirky in terms of the information it contains and shares with playback software (I think).
It's a shame as I have some footage I've captured that I need to share with the police. At present, it's like watching an episode of Benny Hill.