Split .MP3 Chunks - FFmpeg No Re-encoding

That ffmpeg command splits an MP3 file into 5-minute chunks without re-encoding. Here’s a clear breakdown:

What each part does

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• -i input.mp3 Uses input.mp3 as the source file.

• -f segment Tells ffmpeg to use the segment muxer (for splitting files).

• -segment_time 300 Sets each segment to 300 seconds (5 minutes).

• -c copy Copies the audio stream as-is (fast, no quality loss).

• output_%03d.mp3 Output filenames like:

  output_000.mp3
  output_001.mp3
  output_002.mp3

Important things to know

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• ⏱️ Cut points depend on MP3 frame boundaries Segments may not be exactly 300 seconds.

• ⚡ Very fast because it doesn’t re-encode.

Common variations

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Start numbering at 1

ffmpeg -i input.mp3 -f segment -segment_time 300 -segment_start_number 1 -c copy output_%03d.mp3

Force exact 5-minute segments (re-encodes audio)

ffmpeg -i input.mp3 -f segment -segment_time 300 -c:a libmp3lame output_%03d.mp3

Split into 10-minute chunks

ffmpeg -i input.mp3 -f segment -segment_time 600 -c copy output_%03d.mp3

Split by timestamps listed in a file

ffmpeg -i input.mp3 -f segment -segment_times 300,600,900 -c copy output_%03d.mp3