The Resize Filter In Virtualdub

Like many open-source projects, VirtualDub is wildly capable, with features and filters beyond those the casual video editor may ever need. The application can dub video files from one format, such as MPEG, to another, such as AVI; change the bit rate; boost the volume; filter out video “noise”; and much more. One bugaboo for many beginners is resizing video without distorting or stretching it; for example, to view letterboxed content on a standard screen, or standard video in widescreen. For situations like these, VirtualDub includes the “Resize” filter.

Instructions

1. Open the source video in VirtualDub.

2. Set any video and audio compression options you want. You must perform full video compression to apply the “Resize” filter.

3. Click “Video,” then “Filters….”

4. Click “Add” in the resulting window.

5. Scroll to and click “Resize,” then click “OK” to open the “Filter: Resize” dialog.

6. Choose a new size in absolute or relative terms. This may be sufficient. Click “OK” in each open dialog box to return to the main interface, then click “File” and “Preview Filtered” to test it.

7. Return to the “Filter: Resize” dialog if necessary by clicking “Video,” then “Filters…,” selecting the “Resize” filter and clicking “Configure” to change the size again, adjust the aspect ratio — that’s width and height as a proportion, such as 4:3 for standard and 16:9 for widescreen — and add letterbox bars if necessary.

8. Output the file as usual once you’re satisfied with the new video frame size.


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