311347 2026-04-02 05:54:53 -0700 [GStreamer] Use an explicit allowlist of AAC AOTs 2026-04-02 06:03:01 -0700 1 1 1 Unclassified WebKit WebKitGTK WebKit Nightly Build Unspecified Unspecified NEW P2 Normal --- 1 aboya aboya bugs-noreply oldest_to_newest 2196276 0 aboya 2026-04-02 05:54:53 -0700 Currently the GStreamer ports of WebKit report support to any codec string starting with "mp4a" if there is a decoder that supports audio/mpeg, mpegversion=4. This is too optimistic and can lead to applications choosing to use newer MPEG-4 Audio codecs not yet supported by the user's system. This patch makes WebKit play it safer and instead only report support for AOTs with widespread support. This includes reporting AOT 42 (typically used with xHE-AAC) as not supported. Ideally we would query support for it somehow and reply accordingly, but that would necessitate decoders to provide a uniform API for querying such support, which unfortunately does not exist (and would be tricky in practice as support is not always binary). An environment variable is provided to declare explicit support or lack thereof in environments where this is well-known, as well as for debugging and experimentation. * Source/WebCore/platform/graphics/gstreamer/GStreamerRegistryScanner.cpp: (WebCore::GStreamerRegistryScanner::initializeDecoders): 2196278 1 aboya 2026-04-02 06:03:01 -0700 Pull request: https://github.com/WebKit/WebKit/pull/61915