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| b0w0 |
| Posted: Jul 16 2010, 03:54 PM |
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Newbie
Group: Members
Posts: 2
Member No.: 28021
Joined: 15-July 10
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Dear all,
I have a quite big movie, around 9 GB. It consists of mainly not moving image for every frame except some little moving things. Therefore, I'd like to substract all the non moving parts from every frame so that what is left is only moving parts. This way I can extract the information quickly without getting distracted with non important parts.
I'm thinking of taking a frame and use it as a background and substract that frame from every other frame.
Is there any way to do it using VirtualDub?
Thanks.
Regards,
Bowo |
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| -SPM-Mad |
| Posted: Aug 7 2010, 02:02 AM |
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Advanced Member
Group: Members
Posts: 197
Member No.: 1332
Joined: 13-December 02
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It is possible with VirtualDub and some additional filters. But it needs processing of the whole video... there is a more flexible solution by using a frameserver. VirtualDub has one, but to be honest, never played around with it.
Usually in this cases I use AviSynth. http://avisynth.org/mediawiki/Main_Page
After it has been installed, the System can open *.avs files wich are rendered directly to a video. And these avs files contain scripts. With some studying of the documentation you will quickly find an input filter to load the video and the background and then combine them using substraction or differential imaging.
This 'scripted video' then again could be loaded into VirtualDub.
Additionally you could add massive motionblur/temporal smoothing to the second soucrce to get a video of the 'average' picture of the last fest seconds and combine this with the unmodified picture. This way the differential picture would show somewhat 'recent fast changes in the picture'.
Feel free to ask more =)
Greetings
-SPM-Mad |
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