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BEST WAYS TO SPLIT MP4 FILES INTO EQUALLY SIZED PARTS USING FFMPEG

Abstract: Learn how to split MP4 files into equal parts using FFmpeg with this
simple command.

2024-06-18 by DevCodeF1 Editors



BEST WAYS TO SPLIT MP4 FILES EQUALLY INTO SMALLER PARTS USING FFMPEG

Splitting MP4 files into smaller parts of equal time length can be useful for
various purposes such as sharing clips on social media platforms, creating
backups, or reducing file size. One popular tool for this task is FFmpeg, a
powerful and versatile multimedia framework that can handle a wide range of
video and audio formats.


UNDERSTANDING THE BASICS OF FFMPEG

Before diving into the specifics of splitting MP4 files, it is important to
understand the basics of FFmpeg. FFmpeg is a command-line tool that can be used
to convert, stream, and manipulate multimedia files. It supports a wide range of
codecs and formats, making it a popular choice for video and audio processing.


SPLITTING MP4 FILES USING FFMPEG

To split an MP4 file into smaller parts of equal time length, you can use the
following FFmpeg command:

ffmpeg -i input.mp4 -f segment -segment_time 00:00:05 -c copy output%03d.mp4

In this command:

 * -i input.mp4 specifies the input file
 * -f segment specifies the format of the output files
 * -segment_time 00:00:05 specifies the duration of each segment (5 seconds in
   this example)
 * -c copy specifies that the input codecs should be copied to the output files
   without re-encoding
 * output%03d.mp4 specifies the naming pattern for the output files, with %03d
   being a placeholder for the segment number

For example, if you have an MP4 file named 2024-06-02_12-34-51.mp4 and you want
to split it into segments of 5 seconds, you can use the following command:

ffmpeg -i ../data/2024-06-02_12-34-51.mp4 -f segment -segment_time 00:00:05 -c
copy v1_%03d.mp4


TROUBLESHOOTING COMMON ISSUES

If you have tried the above command and encountered issues, here are some
troubleshooting tips:

 * The output files are not of equal time length: This may be due to the input
   file having variable frame rate (VFR). To fix this, you can use the -vsync
   option to force constant frame rate (CFR). For example:
   
   ffmpeg -i input.mp4 -vsync cfr -f segment -segment_time 00:00:05 -c copy
   output%03d.mp4

 * The output files have audio and video out of sync: This may be due to the
   input file having different audio and video timestamps. To fix this, you can
   use the -async option to adjust the audio timing. For example:
   
   ffmpeg -i input.mp4 -async 1 -f segment -segment_time 00:00:05 -c copy
   output%03d.mp4

 * The output files have missing frames: This may be due to the input file
   having corrupt frames. To fix this, you can use the -err\_detect option to
   ignore corrupt frames. For example:
   
   ffmpeg -i input.mp4 -err\_detect ignore\_err -f segment -segment\_time
   00:00:05 -c copy output%03d.mp4

In this article, we have covered the best ways to split MP4 files equally into
smaller parts using FFmpeg. We have discussed the basics of FFmpeg, the command
to split MP4 files, and troubleshooting tips for common issues. With this
knowledge, you can now confidently split your MP4 files into equal-sized parts
for various purposes.


REFERENCES

 * FFmpeg Documentation: https://ffmpeg.org/documentation.html
 * FFmpeg Segment Muxer:
   https://ffmpeg.org/ffmpeg-formats.html#segment_002c-stream_005fsegment_002c-ssegment
 * FFmpeg Errors: https://ffmpeg.org/ffmpeg-all.html#Error-messages


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Tags::  FFmpeg Video Editing MP4




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