Possible to make semitransparent video from semitransparent images?

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
Walter Roberson 2013-1-23
Do you need a particular video file format?
What would be the target to display it in?
Jared
Jared 2013-1-23
Don't care about format, provided it plays in powerpoint.
Walter Roberson
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?

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Walter Roberson
Walter Roberson 2013-1-23

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Jared
Jared 2013-1-23
Are you suggesting a gif (rather than avi etc.) based on limitations in MATLAB, limitations in Powerpoint, or both?
Oliver Woodford
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.
Walter Roberson
Walter Roberson 2013-1-23
http://stackoverflow.com/questions/4073303/can-i-have-a-video-with-transparent-background-using-html5-video-tag
mp4 videos cannot be transparent, it appears. I gather flash can, but I do not find any software to create swf files from MATLAB.

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Jared
Jared
2013-1-23

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