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How do i use a movie file as a background?
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How do i use a movie file as a background? // Archive: Tech Forum
Post by JaimeS // Apr 26, 2006, 4:27pm
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JaimeS
Total Posts: 14
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Is it possible to place or use a movie file as a background so as to easily composite video? Or at least be able to guide the 3d object easily into alignment with the real world?:confused: |
Post by TomG // Apr 26, 2006, 6:16pm
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TomG
Total Posts: 3397
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You can - simply select "Background Effects - Image" and you can load an AVI into that. The background can be viewed in realtime mode if you enable Background (this is in Modeler if you are in tS7, or in the regular window if in an earlier version of tS) - you can see it move as you scrub through the animation (though I didnt see it move if I played back the animation in realtime).
You can see the final effect on rendering out to an animation.
Best thing is to ensure you render from a window that is the same size as the original AVI to avoid stretching and loss of quality.
HTH!
Tom |
Post by JaimeS // Apr 26, 2006, 6:34pm
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JaimeS
Total Posts: 14
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Thank you. I think it is important to point out that not all formats are supported. Even though the movie might be .AVI I tried using 'NTSC DV' and it cam out all garbled. I then decided to just use uncompressed AVI and it worked.
Not sure what other specific formats work.
If any one has a list of formats that work for background use please let me know.
Thanks :jumpy:
For an example of my work in progress ckeck out the link below
Composite Video TS7 - Lightworks (http://www.zamalloacafe.com/tmp/Comp_test.wmv) |
Post by Alien // Apr 27, 2006, 12:52am
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Alien
Total Posts: 1231
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For an example of my work in progress ckeck out the link below
Composite Video TS7 - Lightworks (http://www.zamalloacafe.com/tmp/Comp_test.wmv)
Link doesn't work. :confused:
<edit>
problem was at my end, sorry.
</edit> |
Post by GraySho // Apr 27, 2006, 8:26am
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GraySho
Total Posts: 695
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For any editing or compositing I recommend the use of uncompressed avi for quality and speed reasons. Big harddrives are not that much of a question these days.
Just compress the final output and everyone's happy ;) |
Post by TomG // Apr 27, 2006, 9:50am
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TomG
Total Posts: 3397
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Actually for rendering from tS best to go to a sequence of image files and not AVI at all. Always comes up every so often, always worth mentioning :)
Reasons - you can change your codec / compression settings without having to re-render, ideal if you find the compression messes things up. Painful to redo that 24 hour render just to correct the codec.
- you can continue where you left off if your machine crashes, there is a power outage, aliens invade, and so on. With AVI, if anything interrupts the render, the whole file is lost. With single images, if anything interrupts the render, only a single frame is lost, and you can pick up exactly at that frame and carry on later with no lost rendering time.
- should you decide that you don't like frames 327 to 540 out of 20,000, it is easy to just re-render those frames, and recompile the video. No need to re-render all 20,000 frames.
Those are the big reasons. It's a very useful thing to do.
HTH!
Tom
EDIT, PS: Use a lossless compression format like PNG or maybe TGA. This way you save on disk space compared to uncompressed AVI (which I believe has no compression at all, not even lossless compression), but you don't introduce artefacts from compression in JPG etc. |
Post by JaimeS // Apr 28, 2006, 8:13am
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JaimeS
Total Posts: 14
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Thanks to everyone for the replies! :D
Thank you TomG you have been very helpful and informative.
Im not familiar with image sequences for backgrounds, but im sure its in the book. ill be sure to read up on it :)
Thanks to everyone again :jumpy: |
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