All posts by Jean Le Feuvre

GPAC 26.02

We are happy to announce the release of GPAC 26.02, moving to year.month naming scheme from now on.

This release brings many new features in packaging, Multicast ABR with HTTP repair, HTTP/3 support and other goodies, check the complete changelog below for more details !

This release also brings a new web UI for remote monitoring of long-running GPAC sessions, allowing real-time visualization of the session.

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

Enjoy, give us feedback and spread the news!

Read more: GPAC 26.02

Detailed changelog:

gpac

  • Added mode for testing deferred graph linking apps
  • main() can return filter session error code using -rv

MP4Box

  • Better support for HEIF/AVIF import
  • New ‘times’ option to rewrite timestamps

Core tools

  • Network Capture and Replay using pcap or pcapng, including looping, loss and reordering simulation
  • HTTP/3 support for client and server
  • Added libcurl as backend for GPAC downloader
  • QuickJS 2025, FFmpeg 8
  • Improved GFIO (including file deletion)

Media Formats

  • ISOBMFF external tracks support
  • Event Message Tracks support
  • Improved support SCTE-35, id3, CC, timecodes and other markers
  • Improved HDR signaling support
  • IAMF support
  • Motion JPEG2000
  • AC-4 support
  • AVS3 support

MPEG-DASH & HLS

  • SSR support for L3D low latency, base64 encoding of init segments
  • HLS groups, IV injection
  • DASH/HLS: new segcts option to derive startNumber from first packet cts
  • mux time prft injection

Remote monitoring

  • A new WebSocket based remote monitoring UI is available for GPAC
  • WebSocket server for JS scripts

Filters

  • DVB-I MABR FLUTE mux and demux
  • MABR (ROUTE/FLUTE) HTTP repair support with full or partial modes
  • MABR (ROUTE/FLUTE) on unicast
  • mediaserver.js HTTP gateway filter supporting MABR sources
  • avmix playlists now accept ipid:// urls to locate input pids, allowing to specify playlists independently from source URLs
  • ClosedCaptions encoder
  • TTML merger
  • flist: Playlist piping, DASH perdiod auto-switch signaling
  • pin: flush signaling upon broken pipe
  • M2TS: USAC support, non real-time NTP injection for TEMI, real-time regulation option for tssplit and tsgendts
  • dvb4linux is back (Terrestrial and Satelite including dibseqc)
  • reframer: time-aligned mode, time discontinuities handling
  • nhml: ability to process fragmented streams
  • bsrw: timecodes injection and rewriting
  • seiloader filter for SEI and AV1 OBUs
  • FFmpeg raw protocol support (use gpac for demux and mux)

Emscripten

  • Improved WASM support
  • Fixes in UI

Other

  • Improved Wiki: glossary, developer section, …
  • Integration with GStreamer (gpac-gst-plugin)
  • Introduce unit tests in complement to the testsuite and various buildbot continuous checks
  • Many bug fixes and security patches

GPAC 2.4

We are happy to announce the release of GPAC 2.4

This release marks the beginning of GPAC in your browser with emscripten support, with a live demo at https://wasm.gpac.io !

This release also brings many new features including pcap support, async net IOs, JIT packaging for on-demand content and better subtitle/CC support.

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

Enjoy, give us feedback and spread the news!

Continue reading GPAC 2.4

GPAC 2.2

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

GPAC 2.0

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