Issues

• mp4box.js short tkhd atom RangeError via unchecked fixed-field reads

  gpac/mp4box.js#564 · Filter by author hibrian827 opened on Jul 14, 2026

• 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

• The demo for "A player that performs on-the-fly fragmentation" seems to be broken

  bug
  gpac/mp4box.js#547 · Filter by author lideen opened on Feb 20, 2026

• 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

• Docs and demos are outdated

  enhancement
  gpac/mp4box.js#519 · Filter by author Yentis opened on Oct 20, 2025

• Regression: mehd undefined not checked anymore

  bug
  gpac/mp4box.js#518 · Filter by author Yentis opened on Oct 20, 2025
  4

• Why can the same mp4 file be successfully demultiplexed in version 0.5.4 but fails in version 2.1.2?

  bug
  gpac/mp4box.js#517 · Filter by author army8735 opened on Oct 17, 2025

• TypeError: Cannot read properties of undefined (reading 'cts')

  bug
  gpac/mp4box.js#515 · Filter by author big-nacho opened on Oct 9, 2025
  2

• [BoxParser] Invalid box type error logs should be avoided, or perhaps allow clients to install handlers to replace logging functions.

  enhancement
  gpac/mp4box.js#510 · Filter by author louderspace opened on Sep 5, 2025
  3

• 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