Le mardi 2 février 2016 02:08:51 UTC+1, Ralph Giles a écrit : > We intend to support the Opus audio codec in mp4 fragments and files. > > Opus is a royalty-free audio compression format developed by Mozilla > (Xiph), Microsoft (Skype), Broadcom and others. It offers better > quality for both voice and music, scaling over a wider range of > network speeds and with lower latency than previous codecs. It's been > in Firefox for several years and on its own is a manditory part of the > WebRTC specification. > > MP4 is the most widely used video format on the web today. > > Combining the two will give us a way to record and play back > interactive WebRTC streams with Opus audio and h.264 video, which > currently doesn't work because they have different container supports.
No, you can support H264 in Matroska in Mozilla just fine. It just takes a few lines of codes. > We also hope to make it easier for site authors to take advantage of > better compression technology by reducing migration barriers for > established code based on the mp4 container. > > The plan is to support this through the mp4 parser rewrite Matthew > Gregan and I are doing in the rust programming language, so > availability will be gated by --enable-rust as well as a pref, likely > media.mp4.opus.enable. Currently that would limit it to official > builds on MacOS X and 64-bit Linux, but I hope there will be more > soon. > > We do not have a target release for this yet. Whenever we feel the > specification is sufficiently stable. > > More about Opus at https://opus-codec.org/ > Draft spec at https://opus-codec.org/docs/opus_in_isobmff.html > > > Comments welcome, > -r _______________________________________________ dev-platform mailing list dev-platform@lists.mozilla.org https://lists.mozilla.org/listinfo/dev-platform
