How do I split a large mp4 file using ffmpeg, into smaller clips, which are 15 seconds each?
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what video player are you using to play the files? – mchid Jul 13 '15 at 20:25
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Use the segment muxer:
ffmpeg -i ~/Desktop/in.mp4 -c copy -map 0 -f segment -segment_time 15 -reset_timestamps 1 -segment_format_options movflags=+faststart out%03d.mp4
This example will use stream copy mode, so re-encoding will be avoided. However, it has to cut on the nearest keyframes so accuracy is not guaranteed. Remove
-c copyif you need more accuracy, but note that re-encoding will occur.Output files in this example will be named
out001.mp4,out002.mp4, etc.
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Thanks, and if the video file is located in the Ubuntu desktop, how do I include the path in the command? )Let's assume the output files are created in the desktop). Kindly let me know – Dominic Isaiah Jun 24 '15 at 8:51
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@DominicIsaiah I updated the example to include the Desktop in the path to the input. See Ubuntu Wiki: Using the Terminal - File & Directory Commands for more info. – llogan Jun 24 '15 at 16:46
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Some of the clips would play, but others would show error messages or would not play at all. I feel some of the clips got corrupted. Is there a way to fix this? – Dominic Isaiah Jun 26 '15 at 17:43
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1@DominicIsaiah Please provide a pastebin link showing your command and the complete console output. What player did you use? Can you provide the input file? – llogan Jun 26 '15 at 18:14
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I used the same command which you mentioned "ffmpeg -i ~/Desktop/in.mp4 -codec copy -map 0 -f segment -segment_time 15 \ -segment_format_options movflags=+faststart out%03d.mp4" – Dominic Isaiah Jul 3 '15 at 13:04
