Thundering Herd

For rendering audio and video Firefox typically uses either the operating system's audio/video codecs or bundled software codec librari...

One of the quirks of Firefox's video playback stack is our skip-to-next-keyframe behavior. The purpose of this blog post is to document...

Sometimes when you're playing a media file using an HTML5 <video> or <audio> element, or with WebAudio, you really want to ...

Several years ago my Dad came to me and asked me how to rotate a video he'd recorded on his camera. He'd turned the camera sideways...

The HTMLMediaElement.canPlayType() API enables you to query what video formats a user agent can play. For "video/mp4", the contai...

I have been hard at work getting our H.264 support on Windows Vista and later hardware accelerated using DXVA2. I'm happy to say that t...

Support for playing H.264/AAC in MP4 and support for playing MP3 audio files in HTML5 <video> and <audio> elements has now been...

Paul Adenot has recently landed patches in Firefox to enable the playbackRate attribute on HTML5 <audio> and <video> elements. ...

As the Internet has already discovered , recently I landed patches to add a Windows Media Foundation playback backend for Firefox. This is ...

A few days ago I enabled the HTML full-screen API in Firefox nightly builds. This enables developers to make an arbitrary HTML element ...

French intern Paul Adenot has recently implemented the seekable and played attributes on the HTML5 video and audio elements in Firefox. T...

While working on the Firefox HTML5 video and audio support, I've found it extremely useful to have an HTTP server on which the transfer ...

I recently landed  bug 664341  into mozilla-central, which adds an API to specify the amount of virtual address space reserved for the threa...

I've landed video frame paint performance counters for HTML5 video onto mozilla-central. This should ship in Firefox 5, barring any dis...

To assist others coming up to speed on the architecture of the video decoder, I've put together a diagram of Firefox 4's video playb...

Say you've started playback of an HTML5 audio or video element, and you decide you really want to cancel playback and downloading of the...

I've updated the media load() implementation in Firefox 4 to match the current WHATWG media load algorithm specification . There are thr...