Is Bilinear the best algo for a straight 2:1 (linear dimension) downsize? With Lanzcros being better for non-power-of-2 downsize ratios. For example:
1920x1080 -> 960x540 Use Bilinear
1920x1080 -> 854x480 Use Lanzcros
Dan.
Test and see what suites you best. A lot could depend on the kind of video you're downscaling (anime, sport, ...)
more info:
- Image scaling (https://en.wikipedia.org/wiki/Image_scaling)
- Comparison gallery of image scaling algorithms (https://en.wikipedia.org/wiki/Comparison_gallery_of_image_scaling_algorithms)