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[whatwg] Displaying poster for audio in <video>

From: Simon Pieters <simonp@opera.com>
Date: Wed, 30 Nov 2011 08:31:50 +0100
Message-ID: <op.v5q0jckridj3kv@simon-pieterss-macbook.local>
On Tue, 29 Nov 2011 20:18:40 +0100, Tab Atkins Jr. <jackalmage at gmail.com>  
wrote:

> On Tue, Nov 29, 2011 at 5:54 AM, Jeroen Wijering
> <mail at jeroenwijering.com> wrote:
>> Hello all,
>>
>> Playing audio in <video> succeeds consistently across browsers, as  
>> described in the spec:
>>
>>  "Both audio and video elements can be used for both audio and video.  
>> The main difference between the two is simply that the audio element  
>> has no playback area for visual content (such as video or captions),  
>> whereas the video element does."
>>
>> However, poster display behavior varies between browsers. Some browsers  
>> (FF, IE, Opera) will keep the poster up after an audio file has  
>> started, other browsers (Webkits, WinPho) clear the poster, which  
>> results in a blank area:
>>
>>  http://goo.gl/0g77d
>>
>> It would be good if this behavior could be rationalized and/or  
>> addressed in the spec. My preference would be to continue showing the  
>> poster image if the media file has no (active) video track - a poster  
>> image looks much better than a blank area.
>>
>> Ideally, this would also be the case for "fullscreen" playback on  
>> mobile devices.
>
> I agree that keeping up the poster frame is the more useful behavior,
> and that this should be specified in the spec.

It is already.

"When no video data is available (... the media resource does not have a  
video channel), the video element represents the poster frame."
http://www.whatwg.org/specs/web-apps/current-work/multipage/the-video-element.html#attr-video-poster

-- 
Simon Pieters
Opera Software
Received on Tuesday, 29 November 2011 23:31:50 UTC

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