How to play and convert Elro AVC video files

Today I had a very hard time playing avc video files of an Elro 4ch 500GB HDD DVR DVR534. I found a solution in FFMpeg.

Command:

C:\Users\Mark\Downloads\ffmpeg-20130215-git-4a6fa79-win32-static\bin>ffplay "filename.avc"

Downloaded codecs:

K-Lite Codec Pack 9.7.5 

Fortunately, it's also possible to convert the avc files to standard avi files:

C:\Users\Mark\Downloads\ffmpeg-20130215-git-4a6fa79-win32-static\bin>ffmpeg "filename.avc" c:\folder\filename.avi