Quote:
Originally Posted by klaze
Also just as easy it is for you to add a tag to the video file it would be just as easy to remove it.
And what if the clip is encoded from mpeg to flv for a tube and the tag is lost?
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It wouldn't be quite as easy to remove it as it would be to add it.
For example, use a dynamic visual tag that consists of a pattern of spots moving across the screen in a pseudo-random way. It's possible to add visual tags like that without them being visible to a user while watching the video. And, if it's actually part of the video, encoding wouldn't simply remove it.
It would have to use an error correction method that would require fairly large amounts of redundant data to survive extensive re-encoding and still be readable, but since the amount of information you're embedding is extremely small, that shouldn't be a problem.