Dear GPAC Community,

Major updates have been made to the GPAC website. To improve clarity and structure, we have undertaken a comprehensive revision to enhance the user experience that is being deployed. 

Understanding Our Users

To ensure that the revamped website aligns with the needs and preferences of our community, we are keen to understand who is using GPAC, any potential gaps in our current website, and any additional insights you might be willing to share. Your feedback is invaluable to us, and we’d appreciate if you would complete the survey.

Please note we will close the survey on 31 December 2023. 

A Brief Overview of GPAC

GPAC, since its inception, has always been more than just a multimedia framework. With capabilities ranging from hybrid broadcast-broadband scenarios to virtual reality (VR) and 3D scenes, GPAC stands out in its versatility and innovation. Our commitment to standards, demonstrated by accolades such as the Emmy awarded to ISOBMFF in 2021, is a testament to our dedication to excellence.

The success of GPAC is a collective effort. From its beginnings as a startup in New York City in 2000 to its evolution as a leading open-source project, the commitment and expertise of our contributors have been pivotal. Our collaboration with esteemed institutions like Télécom Paris and partnerships with entities like Motion Spell have further enriched our journey. 

We are also deeply grateful to our major sponsor, Netflix, not only for their strong support of the developer community here at GPAC but also for their dedication to open standards and innovation. Their alignment with our vision was further exemplified last year when Netflix successfully integrated GPAC software into its global content operations.

Engage with Us

We invite you to share your thoughts via the survey. Whether you’re involved in video streaming, research, or are a developer keen on multimedia frameworks, your insights will shape the future direction of GPAC.

We appreciate your continued support and engagement with GPAC.

The GPAC team

We are happy to announce the release of GPAC 2.2

This release marks the end of MP4Client/Osmo4/Osmo4Ios/Osmo4Android, with gpac being used for all platforms – Android app now supports running gpac and MP4Box command line as well as running the GUI.

This release also brings better support for MKV, DolbyAtmos and DolbyVision.

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

Enjoy, give us feedback and spread the news!

Detailed changes:

Media Formats

• 2-pass encoding for FFmpeg codecs other than libx264
• Conversion filters for VTT, TXG3 and TTML
• SubstationAlpha subtitle import (basic)
• DVB subpictures in M2TS mux and demux
• FFMPEG (mostly for Matroska) subtitle import and export (SRT/SSA to TX3G, TX3G to SRT, WebVTT and DVB subpictures)
• EC3+Atmos signaling support
• ALAC support
• Improved DolbyVision muxing

Media player

• subtitle delay and position adjustment
• audio delay adjustment

MP4Box

• allow numbers and media types as identifiers for track actions
• dlba option to update atmos+ec3 signaling

Filters

• UTC-based range extraction in reframer
• Thumbnail generator filter
• Added unframer filter
• FFMPEG bitstream filters support
• initseg support in mp4dmx filter
• Access to GPU textures of decoders in Python and JSF bindings (glpush filter for tests)
• Chapters editing and original timestamp dispatch in reformer range extraction
• dual in-band and out-of-band parameter set support in dasher
• non-blocking IO for RTSP and HTTP servers/clients
• RTSP over HTTP in rtsp server
• Source-Specific multicast for udp and rtp inputs
• User Authentication for HTTP and RTSP servers
• TLS support for RTSP client and server
• Per-filter buffering options

Encryption

• ClearKey support in dasher and decryption

Misc

• QT metadata tags in MP4Box and qt muxer
• support for some packet properties in URL templates

For Immediate Release, Tuesday, 8th November 2022

Motion Spell deploys GPAC Open Source Software with Netflix to build a flexible encoding and packaging platform

​GPAC Licensing – exclusively handled by Motion Spell, provides enhanced support for our industrial/commercial users. See our latest news release “Motion Spell Deploys GPAC Open Source Software with NETFLIX” 8th November 2022.

Read the press release here.

Hi there,

We changed our versioning policy. After releasing a version (e.g. 2.0), we used to immediately create a new version followed by the ‘-DEV suffix’ (e.g. 2.1-DEV). Then when an official release happened we would remove the suffix (e.g. 2.1).

This seems to have created useless discussion on the timeline of GPAC installers and versions: was 2.1-DEV anterior (yes) or posterior (no) to the official 2.1 release?

To mitigate that issue, we have decided that odd minor versions (e.g. 2.1-DEV) would be dedicated to our development rolling-releases. These versions are tested using our CI but they might occasionally break until we detect and fix the issue, usually thanks to you. These breakage are unfortunately unavoidable, and that’s the precise reason we need a community and a robust test suite and CI/CD system.

Even versions (e.g. 2.0 or 2.2) are stable releases.

As a consequence our next release will be 2.2. That should be soon… stay tuned!

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 gpac.io for most common platforms.

Enjoy, give us feedback and spread the news!

Continue reading GPAC 2.0 →