- From: Eric Carlson <eric.carlson@apple.com>
- Date: Tue, 14 Oct 2008 07:26:30 -0700
On Oct 13, 2008, at 4:47 PM, Robert O'Callahan wrote:
> On Tue, Oct 14, 2008 at 12:10 PM, Ian Hickson <ian at hixie.ch> wrote:
> Try to play all the videos you have available, and catch errors:
>
> <video id=a>
> <source src="video.mp4" type="video/mp4; codecs="avc1.42E01E,
> mp4a.40.2"">
> <source src="video.3gp" type="video/3gpp; codecs="mp4v.20.8,
> samr"">
> <source src="video.ogv" type="video/ogg; codecs="theora,
> vorbis"">
> <source src="video.mkv" type="video/x-matroska;
> codecs="theora, vorbis"">
> </video>
> <script>
> document.getElementById('a').load();
> if (document.getElementById('a').currentSrc == "") {
> // failed to find a video that would play
> // do whatever fallback you want to do here
> ...
> }
> </script>
>
> This will reliably work, because load() blocks until a decision about
> which video to play is made.
>
> We may have to change this (e.g. to allow UAs to asynchronously
> fetch and
> try each video)
>
> We definitely have to change that! Having load() synchronous would
> be a disaster.
>
I agree! A truly synchronous load() will result in a terrible user
experience as a UA may need to download a significant amount of data
before it knows if a file is playable.
Eric
Received on Tuesday, 14 October 2008 07:26:30 UTC