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| Unofficial VirtualDub Support Forums > General Discussion > Basic Question |
| Posted by: BabaG May 17 2007, 04:53 PM |
| does virtualdub work with odd frame sizes? i'm working on an art piece where i've made some odd sized video files, 1024x768 as an example. also i have some more normal hd sizes. the file loaded but when i tried to run a filter, a dirt removal filter, i got an error; something to the effect that initializing the filter failed (sorry, not in front of the system at the moment). just trying to figure out where to look for the problem, bad filter or unsupported format. the video is uncompressed at this stage. it's being captured as raw frames of almost 4k from a canon 5d still camera. those raw frames are then being run through a script to crop and resize them to the sizes described above. from there they are run through quicktime, turned into an uncompressed qt, then brought over to my pc, run through rad video tools to turn the qt into an uncompressed avi. it's the avi that comes into virtualdub. thanks, BabaG |
| Posted by: phaeron May 18 2007, 03:29 AM |
| VirtualDub itself is designed to work with odd frame sizes, including 1x1 and 1077x830. I've used it on images as large as 16Kx16K. In general, most video filters will work with such frame sizes as well, but there may be a few that require specific sizes or alignments. |
| Posted by: hereshegoes May 19 2007, 05:41 AM |
| 1024x768 is large but not an odd size since it's a 4 to 3 ratio. You might try resizing it to 400x300 or 320x240 and try the filter again. Or if it's really an odd size and quite large just use the 2 to 1 quality reduction filter. When I have a real odd size video I usually letter-box it so that it comes out to a 4 to 3 ratio and then crop if needed and resize to 320x240 since that's the size I keep on my computer. If it came from a television screen, I resize it to 320x218 first and then letter-box it to 320x240. |
| Posted by: BabaG May 19 2007, 07:23 PM |
| thanks all. the filter works when file is resized to 720x480. also got email from the filter's author saying that, in fact, it doesn't work on images of over 768 so the 1024 width puts my file out of range. also explains why it does work when resized to 720x480. thanks again, BabaG |