Answer for How to merge two streams

Can you please try the first command and then send the console output, it will likely help us figure out the issue.
/evo-avconv -i videosource4recording.mp4 -i Kalimba.mp3 -c:v copy -c:a copy -map 0:v:0 -map 1:a:0 ./OutFile6.mp4


Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.