W3C home > Mailing lists > Public > public-html@w3.org > December 2008

Re: HTMLMediaElement defaultPlaybackRate and playbackRate

From: Ian Hickson <ian@hixie.ch>
Date: Tue, 2 Dec 2008 02:22:50 +0000 (UTC)
To: Pierre-Olivier Latour <pol@apple.com>
Cc: Eric Carlson <eric.carlson@apple.com>, HTML WG <public-html@w3.org>
Message-ID: <Pine.LNX.4.62.0812020222110.17401@hixie.dreamhostps.com>

On Mon, 1 Dec 2008, Pierre-Olivier Latour wrote:
> 
> Using the playback rate is not really a "clean" way to do FF: this is 
> not very efficient and the audio is going to be horrible unless you 
> temporarily mute (or the UA does it for you). Instead, you should have 
> the playback temporarily paused and the playhead jump by X ms every Y ms 
> as long as FF is active: this is the common way to do FF in digital 
> media world (i.e. not tape based). Your DVD player likely does that, so 
> does NetFlix streaming, etc...
> 
> Playback rate is more to do slow-motion or accelerated playback, jog 
> shuttle control, etc...
> 
> Considering the above I still highly recommend we remove 
> "defaultPlaybackRate" as it's no the right solution no matter what, and 
> find a clean way to implement true FF playback DVD style which is 2x, 
> 4x, etc... (typically not 1.76x), has no audio, and skips frames. This 
> certainly sounds like an important feature.

So how should fast forward and rewind look like in the API? I'm happy to 
use another solution if there's a better one; my understanding was that 
the current model was based on Apple's proposal. :-)

-- 
Ian Hickson               U+1047E                )\._.,--....,'``.    fL
http://ln.hixie.ch/       U+263A                /,   _.. \   _\  ;`._ ,.
Things that are impossible just take longer.   `._.-(,_..'--(,_..'`-.;.'
Received on Tuesday, 2 December 2008 02:23:25 UTC

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