GPAC OSS

The first release of 2026, calle 2026.02 is here: github.com/gpac/gpac/rele…🤘 Many improvements in SCTE-35, multicast ABR, HTTP/3, a GStreamer GPAC drop-in replacement of the cmafmux element, etc.

@michael__ni Hi Michael, great video, I love owls! I don't know how gpac became your default player as it's not intended to be used that way. However I'm concerned that the iphone file would cause troubles. Would you mind sending an issue at github.com/gpac/gpac/issu… ?

What video i mailed ? this one from an owl i saw in the woods

Was trying to mail a mp4 to a someone and realized ubuntus default player (gpac) for video/mp4 is not capable to play an mp4 from an iphone upright. Just use ffplay, put something like this in /etc/mailcap

100 Million Downloads: A Milestone for the GPAC Community gpac.io/2025/06/10/100…

Announcing MP4Box.js 1.0.0 with TypeScript support gpac.io/2025/06/19/ann…

@wokbonds @FawkesFaux @THATS_a_Wolfie @LeagueTruth @WeedLawyerKev Oh for heavens' sake! This combination of incantations worked. Various alternatives did not. Basically do the muxing with MP4Box, but put the PCM file in a mov container first.

Introducing GPAC.WASM – the new WebAssembly Interface to try GPAC dlvr.it/T6LtVm

GPAC 2.4 dlvr.it/T5dryH

GPAC documentation updates dlvr.it/T4FLc6

💪 Thanks Dimitri Podborski and Deniz Ugur for the hard work and the GPAC heads up 😎 while presenting your work on #MPEG File Format #Conformance at the #OSMART workshop. Someone's tacking the challenge of increasing standard complexity 👏 github.com/MPEGGroup/File…

Website Update: Your Feedback is Essential dlvr.it/SxCcY8

Interesting interview on the tech used by @Netflix @Instagram and many others for video packaging and much more. @rbouqueau @wearegpac

@DaleCurtis @ldenoue @HCornflower Hi there, we are eager to solve your issue. Please report it here: github.com/gpac/gpac/issu…

@ldenoue @HCornflower In quality mode you'll want to feed it frames until you get output. You only need to call flush at the end. I'm not sure why mp4box doesn't like that codec string. It seems valid, but I'll double check on Monday.

Some strange webcodec bug: if you specify prefer-software in hardwareAcceleration then you need to call flush after every frame you encode or it just stops there hanging….

Ha ha. I'm asking ChatGPT how to write out a "sidx" atom with AVAssetWriter. Oh, that's easy: just use the mp4box command line tool. Right.

@lea_linux MP4BOX

@DaleCurtis @jsconf_india Thank you! 😀 I did come across mp4box.js during my research, but I don't think it supports muxing audio tracks too. Not sure if things have changed.

I've run into my first brick wall 🧱...finding a well maintained demuxer written in Typescript. This is the spaghetti code I've adapted from the W3C examples using a `.d.ts` shim for MP4Box.js. Would love to know if anyone has any suggestions for alternatives 🙏

@daemon404 We are ready: github.com/search?q=repo%…

Now that Safari/HLS has secret support for VP9 in ISOBMFF, I can revive hope for Opus in ISOBMFF support, too.

How set up #DASH live #streaming in low #latency mode? The following article explains the various setups in #GPAC step by step with the specific command lines. 👉github.com/gpac/gpac/wiki… cc @GPAClicensing @wearegpac

Figured out WebCodecs API + mp4box.js 😤

GPAC 2.2 dlvr.it/Sfd5dP