Reading Alpha

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Brendan Bolles

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Jun 6, 2014, 11:39:31 PM6/6/14
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So I guess libwebp lets us write files with alpha via SetAlphaMode() and AddFrameWithAdditional(), but we can't yet read the alpha data, can we?

Also, looking at alpha_encoder.cc, it appears the only way to get the video and alpha encoder to match keyframes is to insist on a fixed keyframe interval for both, right?


How final is the spec to support alpha with AddFrameWithAdditional() as opposed to, say, a separate video track?


Brendan

Brendan Bolles

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Jun 7, 2014, 12:30:09 AM6/7/14
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On Jun 6, 2014, at 8:39 PM, Brendan Bolles wrote:

> So I guess libwebp lets us write files with alpha via SetAlphaMode() and AddFrameWithAdditional(), but we can't yet read the alpha data, can we?


Sorry! I meant libwebm!



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