Dear Support Team,

I have a security system with four VIGI C300HP-4 2.0 cameras and a VIGI NVR1008H(UN) 2.0 recording device.

All cameras have 1.0.11 Build 23041 Rel 57861n firmware, the VIGI NVR has 1.1.1 Build 241127 Rel.76336n firmware.

I use 10fps h264 recording because of compatibility and quicker export, without conversion.

To find something interesting, I ocassionally export files to analyse, search them with an opencv application.

I recognized a strange behaviour during processing, it looks many frames are missing from the mp4 file, where processing stops becuase of no more frames in the file.

[h264 @ 000001ff2b555980] no frame!
[h264 @ 000001ff2b555980] no frame!
[h264 @ 000001ff2b6760c0] no frame!
[h264 @ 000001ff2b676580] no frame!

They processing app was written in Python. I use  fvs = FileVideoStream(videoFileName).start() function from imutils.video to read the video.

Formerly when I used cameras in 1fps mode, I have not experienced similar problem, but in 1 fps mode the movements were smooth enough.

I tried tor repair (convert) files with ffmepg and ffmpeg reported similar issue, see below:

[NULL @ 000001bd851e5b80] missing picture in access unit with size 23470.6kbits/s dup=0 drop=5912 speed=17.3x
[h264 @ 000001bd8535d1c0] no frame!
[NULL @ 000001bd851e5b80] missing picture in access unit with size 8
[h264 @ 000001bd85f4e400] no frame!
Error while decoding stream #0:0: Invalid data found when processing input

But regardless the problems reported by ffmpeg, it was able to create a usable errorless file, but it is very time consuming to repair each file regardless I have a quite powerfull desktop computer to cope with it.

Could you look after this problem please?