How to concatenate two MP4 files using FFmpeg?

Question

I\'m trying to concatenate two mp4 files using ffmpeg. I need this to be an automatic process hence why I chose ffmpeg. I\'m converting the two files into .ts files and th

Answer 1

Detailed documentation on various ways of concatenation in ffmpeg can be found here.

You can use 'Concat filter' for quick concatenation.

It performs a re-encode. This option is best when inputs have different video/audio formats.

For Concatenating 2 files:

ffmpeg -i input1.mp4 -i input2.webm \
-filter_complex "[0:v:0] [0:a:0] [1:v:0] [1:a:0] concat=n=2:v=1:a=1 [v] [a]" \
-map "[v]" -map "[a]" output.mp4

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For Concatenating 3 files:

ffmpeg -i input1.mp4 -i input2.webm -i input3.mp4 \
-filter_complex "[0:v:0] [0:a:0] [1:v:0] [1:a:0] [2:v:0] [2:a:0] concat=n=3:v=1:a=1 [v] [a]" \
-map "[v]" -map "[a]" output.mp4

This works for same as well as multiple input file types.