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

REM Convert DAV to MP4 and Concatenate and merge Files 
c:\RecordDownload\bin\ffmpeg -nostats -loglevel 0 -y -f concat -i mylist.txt -vcodec libx264 -crf 24 -filter:v "setpts=1*PTS" MERGED.mp4

REM Take merged video and speed it up for survey
c:\RecordDownload\bin\ffmpeg -nostats -loglevel 0 -i MERGED.mp4 -filter:v "setpts=0.1*PTS" FASTMERGED.mp4

This is what I used for a windows batch file that works, but I have found empirically that the amount of data generated by 6 3MP or 4MP cameras is overwhelming to process. I don't know if this will help