Possible to make semitransparent video from semitransparent images?

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Jared 2013-1-23

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Hi all,

If I've exported transparent (or semitransparent) images to png, it it possible to use these to assemble a video within MATLAB that retains transparency?

Right now I am just using [data color_data alpha_data] = imread('my_image'); , but I don't know how to convert this to a frame (was using im2frame) while retaining the alpha_data.

Or, if it's not possible, is there an easy way to do it outside of MATLAB?

Thanks! Jared

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Walter Roberson 2013-1-23

So to check, it has to play in powerpoint, but it has to be semi-transparent to reveal whatever is behind the powerpoint video-display window?

Jared 2013-1-23

That is correct.

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回答（2 个）

Walter Roberson 2013-1-23

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Create an animated GIF.

http://office.microsoft.com/en-ca/powerpoint-help/embed-in-or-link-to-a-video-from-your-presentation-HA010374729.aspx

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Oliver Woodford 2013-1-23

First ask yourself what video formats support transparency. Then ask if PowerPoint supports that format. Then ask if MATLAB can export in that format. It's a mixture of all three factors.