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GPAC is an open-source multimedia framework focused on modularity and standards compliance. GPAC provides tools to process, inspect, package, stream playback and interact with media content. Such content can be any combination of audio, video, subtitles, metadata, scalable graphics, encrypted media, 2D/3D graphics and ECMAScript. GPAC is best-known for its wide MP4 capabilities and is popular among video enthusiasts, academic researchers, standardization bodies, and professional broadcasters. MP4Box is a multimedia packager, with a vast number of functionalities: conversion, splitting, hinting, dumping and others. It is a command-line tool.

Free software
OS: Win Mac Linux
File size: 39MB
Other versions
Old versions
Version history
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GPAC MP4Box screenshot
Latest version

2.0 (February 22, 2022)


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Download GPAC MP4Box 2.0 Windows 64-bit  44MB  Win64

Download GPAC MP4Box 2.0 Windows  39MB  Win

Download GPAC MP4Box 2.0 Mac 64-bit  29MB  Mac64

Download GPAC MP4Box 2.0 Linux 64-bit  5MB  Linux64

Download Beta and other versions

Download GPAC MP4Box latest Beta/Nightly Windows 64-bit  43MB  Win64

Download GPAC MP4Box latest Beta/Nightly Windows  43MB  Win

Download GPAC MP4Box latest Beta/Nightly Mac  43MB  Mac

Download GPAC MP4Box latest Beta/Nightly Linux  43MB  Linux

Download old versions

Download GPAC MP4Box old versions

Software License

Free software / FOSS (Free download and also Free and Open Source Software)

Supported operating systems

WinWindows MacMac OS LinuxLinux

More information and other downloads

Download Mp4box 0.4.6 here.
Download Mp4box 0.4.4 here.
Download Mp4box 0.4.3 here.

Download YAMB here, a mp4box GUI.

Download my MP4box GUI here, another simple mp4box GUI.

Download MP4 FastStart here or here(direct link), it adjusts the MP4s metadata to allow for Flash players to play them right away, while it progressively downloads. Or use mp4box with the hint command(mp4box -hint video.mp4)

Version history / Release notes / Changelog / What's New

GPAC 2.0
22 February 2022

We are happy to announce the release GPAC 2.0, packed with new features!

This release brings support for Python and NodeJS: you can now interact with GPAC media pipelines using these languages, from basic session processing down to packet-level manipulations.

A new JSON-based video editor called avmix has landed in GPAC: it is designed for typical live processing tasks (scheduling, animations and transitions, graphics/text insertion) running from command line with or without GPU.

A lot of work has been put on HLS support for both client and packager, with support for low latency HLS.

MP4Box has been improved as well and is now capable of in-place rewrite, resulting in much faster IOs when editing files.

As usual, installers are available on for most common platforms.

Enjoy, give us feedback and spread the news!

New features
Adaptive Streaming
Low Latency HLS (LL-HLS, generation and playback)
Custom forwarding modes of DASH reader, allowing for example to encrypt/decrypt a live DASH/HLS session
DASHing now possible using inband cues (generated by flist, dashin or dasher filters)
Cue-generation only mode for dasher
HLS/DASH signaling of intra-only representations
playback improvements for SRD (HEVC tiling and independent streams)
CMAF-compatible signaling
PPS injection for inband parameter set modes
Improved SmoothStreaming support
DASH period continuity support (from playlists or reframer)
DASH MPD Chaining support
Text segments in native format (WebVTT, TTML) in dasher
User tags injection for HLS master and variant playlists
Image File Format (HEIF)
Grid creation and other derived images
Time range in -add-image
Item to sample data reference (no copy)
Item to item data reference (no copy)
Generic auxiliary image tagging
Image replacement in HEIF collection
AV1 (AVIF) and VVC support
In-place editing (no file remultiplexing)
Improved splitting, including sample-accurate split
ISOBMFF edit lists modification through :edits and -edits options
Track extraction from non ISOBMFF sources in MP4Box
Most import options can now be applied on an existing ISOBMF file or track
Multiple filter chains per source in -dash or -add modes
Chunk interleaving dumper
Simplified gpac command line (backward compatible syntax) avoiding links directives for common cases
Added avmix, a playlist-based audio video mixer/compositor with GPU or software rendering
Python bindings for filter session
NodeJS bindings for filter session
Custom HAS adaptation algorithms (JS, Python and NodeJS)
Custom Remotery callbacks (JS, Python and NodeJS)
Added avgen, a simple counter generation
Splicing support in playlists: raw and compressed domain, vod and live splicing
Tile splitting now available as a filter
Added restamp, a stream timestamp rewriter filter
Added bssplit and bsagg, compressed bitstream splitter and aggregator filters
Aspect ratio support in rescaler (ffsws)
Raw (uncompressed) modes for flist and reframer
Flip and rotate in vout
Simple UI for vout to test seeking and speed modes
Improved color space support in rendering (OpenGL only)
Improved round-trip audio decode
Improved audio resampler
Added back old arch compositor features (TEMI support, HEVC tiling JS monitoring, MPEG-4 SegmentDescriptor)
Reading back frame interface data (GPU, decoder mem) in JS or Python sink filters
Memory storage in httpout server file sink
FileIO wrapper available in QJS, Python and NodeJS
HTTP/2 (client and server) through nghttp2
ROUTE multiplexer and low-latency ROUTE (mux and demux)
Media Formats
Improved MPEG-H audio mux/demux/dashing
VVC parsing, inspecting, mux/demux (ISOBMFF, M2TS), RTP, DASH and encryption
VUI color info rewrite for AVC, HEVC and VVC (mp4box and bsrw filter)
Dolby TrueHD
DolbyVision muxing
Improved multichannel AAC (>=8) support
Improved raw video in ISOBMFF support
Bitstream dumping for inspect analyze mode
Improved TTML support: metrics, image embedding (IMSC1), TTML sample merging while exporting, subtitle zero in TTML
YouTube VR meta-data
yuv4mpeg format read/write
Extended NHML syntax for properties, reconfiguration, subsamples and sample auxiliary data
Multi-key per sample encryption
HLS full segment encryption and decryption
Per-segment or per-period key roll
Master/leaf key schemes
Improved HTTP rate limiter and chunk-transfer rate estimator
Cleanup of mod-dirs and js-dirs usage, JS filters can now be included in the default available filters
Support for windows long path
Moved to latest QuickJS (2021-03-27)
Added QJS-libc modules, support for exec/waitpid/kill and Workers on most platforms
Support for FFmpeg 4.4 +
many bug fixes, improvements and security patches

View full changelog

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Guides and How to's

Acronyms / Also Known As

GPAC MultiMedia, MP4 FastStart, MP4 Fast Start, Mp4Box

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14 reviews, Showing 1 to 5 reviews

Rating by Touchatonkh on Sep 2, 2020 Version: 1.0 OS: Windows 10 64-bit Ease of use: 1/10 Functionality: 1/10 Value for money: 10/10 Overall: 1/10

Rating by Touchatonkh on Sep 2, 2020 Version: 1.0 OS: Windows 10 64-bit Ease of use: 1/10 Functionality: 1/10 Value for money: 10/10 Overall: 1/10

On Ubuntu was following this and it worked

sudo apt-get install subversion
sudo svn co gpac
cd gpac
sudo /configure --disable-opengl --use-js=no --use-ft=no --use-jpeg=no --use-png=no --use-faad=no --use-mad=no --use-xvid=no --use-ffmpeg=no --use-ogg=no --use-vorbis=no --use-theora=no –use-openjpeg=no
sudo make
sudo make install
cp bin/gcc/ /usr/lib

Review by _Al_ on May 22, 2020 Version: --- OS: Linux Ease of use: 10/10 Functionality: 10/10 Value for money: 10/10 Overall: 10/10

Tried to install on Linux Mint 19.3, and got following message:
Error: Dependency is not satisfiable: libavcodec-ffmpeg56(>=7:2.4) | libavcodec-ffmpeg-extra56(>=7:2.4).
I got a similar error trying to install an older version some time ago, and it was a pain in the butt trying to locate these files for installation, so much so, that it is not worth the trouble. If you produce software and claim it works under Linux, why don't you have the sense to check it, and ensure that dependencies are met, instead of wasting other peoples time?

Review by an Other on May 22, 2020 Version: MP4Box 0.8.0 OS: Linux Ease of use: 1/10 Functionality: 1/10 Value for money: 1/10 Overall: 1/10

Tha 64-bit build od MP4Box requires the files 'libeay32.dll' and 'ssleay32.dll'. Which is weird, IMNSHO — from what I have read thus far, these two files are OpenSSL stuff, and I see no point in making an MP4 multiplexer depend on SSL functions...

Review by El Heggunte on May 30, 2016 Version: 0.6.2 rev551 OS: Windows 7 64-bit Ease of use: 7/10 Functionality: 8/10 Value for money: 9/10 Overall: 8/10

14 reviews, Showing 1 to 5 reviews

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