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| Unofficial VirtualDub Support Forums > VirtualDub Filters and Filter Development > Dynamic Masking Filter |
| Posted by: peter_g Apr 10 2003, 12:48 PM |
| I need a filter that masks out or blures an object, e.g. a car's licence plate, which moves on the the screen. Inverse mode (masking out the background and leaving the object) should also be possible. Does anyone know of such a filter? Thank you in advance |
| Posted by: endorphin Apr 10 2003, 04:59 PM |
| This requires motion tracking, pretty complex stuff. It would be nice to see in a free filter for VDub, but that's a lot of programming for free! For comparison, Adobe After Effects standard version is about $500 and the Production Bundle version in which one of the major differences is that it has a motion tracker included, is twice the price. You can do what you want to do (mask a moving object) in Adobe AE then, or probably also with Discreet Combustion. Both are expensive. There's already a motion-stabilizing filter for VirtualDub, and a motion stabilizer already does most of the hard work of extracting motion-tracking data, but it would have to be modified to export position/motion data in order to apply the mask in the right place. By the time that much work is done, it would be almost a full-featured Non-Linear video editing program with effects-keyframe support and all the rest. And no longer free. |
| Posted by: peter_g Apr 14 2003, 05:32 AM |
| Thank you very much for you reply. I was aware that the problem is complex and did not count on the filter to be free. I hesitate to switch to another program, because virtualdub is very handy. I hoped that maybe something is available between the full motion tracking functionality and the current status where you have to key in the parameters for every frame. regards Peter |