Resize: Scale Video with Quality Interpolation
Resize video in vPrism with full control over interpolation. Compare Nearest Neighbor, Bilinear, Bicubic, and Lanczos methods, lock the aspect ratio to avoid stretching, and understand why enlargement improves visibility without introducing detail absent from the original recording.
Transcript
To resize a video in vPrism, load a video and go to the Edit section of the Tool Panel and select Resize.
Set the new Dimensions by typing a width or height. Use the lock icon to keep the aspect ratio fixed so the image is not stretched; with the lock enabled, changing one dimension automatically updates the other.
Unlock it when a non-proportional resize is required for a specific purpose.
Choose an interpolation method from the dropdown before applying the change.
- Nearest Neighbor is a basic method that assigns each new pixel the value of the closest original pixel, which can result in a blocky appearance.
- Bilinear calculates each new pixel from four neighboring pixels, producing a smoother result but with some softness.
- Bicubic calculates each new pixel from 16 neighboring pixels using cubic weighting to better preserve edges and gradients.
- Lanczos uses a high-quality resampling filter that examines 36 neighboring pixels to preserve fine detail and reduce aliasing.
Click Apply to commit the resize, or Reset to return to the original dimensions.
Resize in vPrism adjusts frame size for clearer viewing and presentation.
While enlargements can make features easier to see, the resize process does not introduce new detail absent from the original recording.