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cheatsheet-tldr/tldr/mp4box
2025-12-21 00:23:35 +00:00

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---
syntax: markdown
tags: [tldr, common]
source: https://github.com/tldr-pages/tldr.git
---
# mp4box
> MPEG-4 Systems Toolbox: muxe streams into MP4 container.
> More information: <https://github.com/gpac/gpac/wiki/Fragmentation,-segmentation,-splitting-and-interleaving>.
- Display information about an existing MP4 file:
`mp4box -info {{path/to/file}}`
- Add an SRT subtitle file into an MP4 file:
`mp4box -add {{input_subs.srt}}:lang=eng -add {{input.mp4}} {{output.mp4}}`
- Combine audio from one file and video from another:
`mp4box -add {{input1.mp4}}#audio -add {{input2.mp4}}#video {{output.mp4}}`