Of course nearest neighbour/integer scaling doesn't perform well for general purpose video. Having the reference is useful to determine that there is a pixel shift of the motif.
The built-in scaler is not great, not terrible. Out of the box, it actually performs slightly better than lanczos3 on my random video test (480p low bitrate + compression artefacts to 1080p). Jinc2m looked very poor there. catrom lacked sharpness.
It's going to take some magic to make these videos look good upscaled to 1080p (2-3x upscale), getting a better source is easier.
|