gpac is currently in version 2.2.1 in debian Sid. This version is incompatible with Ffmpeg 7. Upstream has gpac in version 2.4 which is compatible. This bug report request pulling version 2.4 into sid. https://github.com/gpac/gpac https://github.com/gpac/gpac/releases/tag/v2.4.0
I ported version 2.4.0 and created a full set of packages, source files (debian.tar.xz, orig.tar.xz, dsc), etc: https://launchpad.net/~bleedingedge/+archive/ubuntu/noble-bleed/+sourcepub/17011648/+listing-archive-extra Version 2.4.0 brings support for ffmpeg 7, which makes it compatible with recent versions of Debian/Ubuntu (including sid). It also enables porting of packages that depend on gpac (such as ccextractor) to these platform. It would be great if this would be ported officially into debian.
Full patch from 2.2.1 to 2.4.0 attached.
You are a bit late to the game. gpac was removed from Debian so this is a request to reintroduce it. I do not think there is much interest in this package and the Security team might intervene because it had many security issues historically, see https://bugs.debian.org/1034732.