[html5] <video> tag fallback

Henri Sivonen hsivonen at iki.fi
Tue Apr 14 07:22:55 PDT 2009

On Apr 14, 2009, at 15:18, Steven Garrity wrote:

> We're working on implementing the <video> tag to play a Ogg Theora  
> video for a client. We're including a Flash playing in the "fallback  
> content" for Internet Explorer.

Have you considered and rejected using Java-based fallback in IE with  
the same Ogg file that you'll be serving to Firefox?

> We're running into trouble with the lack of a common format, though.  
> It seems the current behaviour in Safari is that if the video format  
> is not supported (Ogg Theora, for example), then the <video> player  
> is shown (empty) rather than the fall back content.
> Is this the intended/spec'ed behaviour when no video format playable  
> by the client is provided?

Yes, this is the specced/intended behavior.

> Please note that I know we can provide a Safari-playable video  
> format as well as a secondary source in the <video> tag. We'd like  
> to avoid having to add another (third, if you count ogg+flash)  
> format, especially another proprietary format.

You could instruct Safari users to install XiphQT.

Henri Sivonen
hsivonen at iki.fi

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