ffmpeg conversion .dav to any video files

Question

I am trying for days to convert .dav file (file generated by dvrs [image recorders]). I have tried several variations with ffmpeg and can not succeed.<

Answer 1

I spend few hours on unsuccessful attempts to do it with ffmpeg.

Problems: lower fps, processing stopping on with no frame error. Seems camera merges video stream in way that ffmpeg can't understand.

As I research, .DAV is kinda closed format from Dahua company.

Smart Player has ability to export video to AVI and it works for me. But it's Windows software.