[theora] Fwd: [whatwg] Suddenly, ~40% of IE users get HTML5 Theora with no effort

Silvia Pfeiffer silviapfeiffer1 at gmail.com
Mon Feb 8 04:25:55 PST 2010

On Mon, Feb 8, 2010 at 6:55 PM, Henri Sivonen <hsivonen at iki.fi> wrote:
> On Feb 7, 2010, at 03:12, Remco wrote:
>> I'm considering two possible development routes:
>>     1. Implement a Theora decoder in ActionScript or hAxe, much like
>>        Cortado for Java. I'd rather use hAxe, since it's a completely
>>        free development environment. This is obviously a lot of work,
>>        but it could mirror Cortado's design.
>>     2. Compile libtheora with Alchemy to Flash bytecode and use it with
>>        ActionScript. Alchemy's generated bytecode is supposed to be an
>>        order of magnitude faster than what you get with ActionScript.
>>        This seems like less work to me, but that's not counting jumping
>>        through Adobe hoops. Also, it's beta.
>> Both hAxe and Alchemy have a Vorbis project.
> Can a Theora bitstream be converted into a valid VP6 bitstream inexpensively? If yes, can Flash load video that's generated locally?

I don't think there is much similarity between Theora and VP6, so you
need to do proper transcoding, just like between Theora and H.264.

I don't quite understand the second question: Flash can indeed load
local files, but you couldn't enforce a hook into Flash to transcode
the remote file before loading the local transcode. This functionality
would have to already be included in the SWF that you download from
the server.


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