Issues

• mp4box.appendBuffer(ab) returns offset that make an infinite loop

  bug
  gpac/mp4box.js#551 · Filter by author acemtp opened on Feb 27, 2026
  1

• Loss of precision in DataStream.readUint64()

  bug
  gpac/mp4box.js#544 · Filter by author DevLARLEY opened on Feb 15, 2026

• Can there be a way to disable logging?

  enhancement
  gpac/mp4box.js#528 · Filter by author james-hu opened on Nov 25, 2025
  2

• Seeking fragmented file broken

  bug
  gpac/mp4box.js#520 · Filter by author big-nacho opened on Oct 20, 2025

• Improvements for colr box.

  enhancement
  gpac/mp4box.js#495 · Filter by author jozefchutka opened on Jul 18, 2025

• Examples/docs request: subtitle processing

  enhancement
  gpac/mp4box.js#483 · Filter by author DaniGuardiola opened on Jul 3, 2025

• MP4Box.js crashes with uncompressed audio.

  bug
  gpac/mp4box.js#467 · Filter by author louderspace opened on Jun 2, 2025
  2

• Feature Request: View mdat Data

  enhancement
  gpac/mp4box.js#460 · Filter by author dukesook opened on May 27, 2025
  7

• Is there an example of combining jpegs into an mpeg stream?

  question
  gpac/mp4box.js#449 · Filter by author velociwabbit opened on May 15, 2025

• Add support vexu box

  box request
  gpac/mp4box.js#394 · Filter by author avelad opened on Apr 17, 2024
  1

• appendBuffer by chunks using a readable stream

  question
  gpac/mp4box.js#387 · Filter by author gspinoza opened on Feb 22, 2024

• Wrong codec information encoded during video creation

  question
  gpac/mp4box.js#384 · Filter by author Pensarfeo opened on Feb 10, 2024

• Origin of cmex / cmin

  question
  gpac/mp4box.js#377 · Filter by author bradh opened on Jan 23, 2024

• Seek to a frame number

  question
  gpac/mp4box.js#361 · Filter by author tobiasBora opened on Sep 21, 2023
  1

• How to extract samples from fragmented MP4 file?

  question
  gpac/mp4box.js#360 · Filter by author Avijobo opened on Sep 20, 2023
  2

• Parse user metadata

  question
  gpac/mp4box.js#356 · Filter by author tobiasBora opened on Sep 19, 2023
  1

• 5.1 track showing only 2 channels

  enhancement
  gpac/mp4box.js#288 · Filter by author JesseNReynolds opened on Jul 11, 2022
  1

• ItemLocationBox (iloc) base_offset field is incorrect

  bug
  gpac/mp4box.js#258 · Filter by author baumanj opened on Dec 4, 2021

• Question: how convert fragment-mp4 to non-fragmented-mp4?

  enhancement
  gpac/mp4box.js#257 · Filter by author iChengbo opened on Dec 3, 2021
  3

• Streaming a MP4 to Browser

  enhancement
  gpac/mp4box.js#89 · Filter by author sassyn opened on May 27, 2016
  3

• Adding an audio track & concatenating multiple mp4 files (-add and -cat)

  enhancement
  gpac/mp4box.js#72 · Filter by author slegay opened on Nov 17, 2015
  1

• Issue Reading QT Compressed mdat Box

  enhancement
  gpac/mp4box.js#69 · Filter by author mattcarp opened on Nov 3, 2015
  2

• update wiki to reflect current state

  enhancement
  gpac/mp4box.js#66 · Filter by author rbouqueau opened on Sep 4, 2015
  

• Write as well as read.

  enhancement
  gpac/mp4box.js#43 · Filter by author gliese1337 opened on Apr 24, 2015
  3

• Seek should bring back range instead of offset

  enhancement
  gpac/mp4box.js#26 · Filter by author guypaskar opened on Dec 16, 2014
  12