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Altera_Forum's avatar
Altera_Forum
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16 years ago

Picture in Picture

Sorry if this is a dumb question .... I can't figure out how Picture in a Picture should work. Assuming I take an image, clip it to just grab a part of the picture and then scale it, how do I place it on a given location of the output picture (with, I assume, the alpha mixer)?

I think that the clip function isn't completely obvious to me. Assume the input of a 100x100 image that is clipped with a rectangle of 30x30 starting at 10,10 do you end up with a 30x30 image or a 100x100 with all pixels outside the 30x30 clip area as black???

Thanks,

Phil

4 Replies

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    16 years ago

    1 - Yes, the mixer will position all layers on top of the background layer. So, the background layer should contain your full-size video, then layer 1 would contain the foreground image.

    2 - The clipper keeps a rectangle of video. so your 30x30 rectangle would result in a video output of 30x30. The remainder of the picture will be removed entirely.

    Jake
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    16 years ago

    Thanks for the quick response! So then, is there a function in the VIP that would put that 30x30 at a given location of a larger image so that the pinp could be in the top right or top left or whereever??

    Thanks again,

    Phil