# sannies/mp4parser

A Java API to read, write and create MP4 files

Repository: https://github.com/sannies/mp4parser
Canonical: https://ross.abutalabs.com/products/mp4parser
Language: Java
License: Apache-2.0
License Family: permissive
Last push: 2024-08-15T22:50:11+00:00

## Health v2 (maintenance only)
Score: 23/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 8, longevity 100
- inputs: {"age_days": 4735, "days_push": 748, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 2800, forks 572 (observed 2026-08-28T04:07:22.591567+00:00)

## What it is
A Java library for reading, writing, and creating MP4 container files. It manipulates the container structure (muxing, appending, metadata, frame trimming) rather than encoding or decoding audio/video streams.

## Use cases
- mux raw h264 and aac streams into an mp4 file
- append multiple video recordings with the same encode settings
- edit or add metadata to mp4 files
- shorten a recording by dropping frames without re-encoding
- parse mp4 container structure in a java application

## When to choose
- you need to manipulate MP4 container structure from Java or any JVM language
- you want to mux or concatenate tracks without re-encoding video
- you need to read or modify MP4 metadata programmatically

## When to avoid
- you need to encode or decode video/audio codecs themselves
- you are not working on the JVM and need a native solution
- you need broad format support beyond MP4/ISOBMFF containers

## Facets
- artifact type: library
- maturity: stable
- function: parser, video-processing, serialization
- domain: media, developer-tools
- platform: jvm, cross-platform
- tags: mp4, isobmff, muxing, video-container, metadata-editing, video

## Member repositories
- sannies/mp4parser (main) score 23

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:07:22.591567+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T18:49:03.952758+00:00, confidence not recorded.
  - readme: https://github.com/sannies/mp4parser (fetched 2026-08-28T04:07:22.591567+00:00, sha 79958ba5fc99)
- Data as of 2026-08-30T08:39:29.467469+00:00.