How to Merge Video Files Using FFmpeg

join_video.txt

file /Users/Video/input1.mp4
file /Users/Video/input2.mp4 

Note : You can add more than two video files. 

Then, run the FFmpeg command.

ffmpeg -f concat -safe 0 -i join_video.txt -c copy output_demuxer.mp4

-safe 0 is added so that any file name will be accepted. The default value 1 will reject absolute paths in the text file.

 extract frames

 ffmpeg -i kickflip.mp4 '%04d.png'

 joing frames

ffmpeg -framerate 60 -pattern_type glob -i '*.png'   -c:v libx264 -pix_fmt yuv420p result4.mp4