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Repeat/loop Input Video with ffmpeg?


 wild
(@wild)
Member Admin
Joined: 2 months ago
Posts: 293
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-stream_loop option

ffmpeg -stream_loop 3 -i input.mp4 -c copy output.mp4
  • This can avoid re-encoding because it can use stream copy.
  • 0 means no loop, -1 means infinite loop.
  • This may not work with anything older than FFmpeg 4.0.

concat demuxer

The concat demuxer allows you to loop an input without needing to re-encode because it can use stream copy.

  1. Make a text file. Contents of an example text file to repeat 4 times.

     file 'input.mp4'
     file 'input.mp4'
     file 'input.mp4'
     file 'input.mp4'
    
  2. Then run ffmpeg:

     ffmpeg -f concat -i list.txt -c copy output.mp4
    

If you want to add additional inputs make sure they all have the same attributes.

Automatically make list.txt in Linux/macOS

This example is the same as above but you don't have to manually make list.txt:

for i in {1..4}; do printf "file '%s'\n" input.mp4 >> list.txt; done
ffmpeg -f concat -i list.txt -c copy output.mp4

With most commonly-used modern shells, you can even avoid the creation of the list.txt file entirely. For example, with bash:

ffmpeg -f concat -i <(for i in {1..4}; do printf "file '%s'\n" input.mp4; done) -c copy output.mp4

   
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