how do I convert a video that shows square pixels to no pixels?

[sxpredman]

I have a problem again. I notice videos I been watching always have pxiel's how to I take them pixels out of it so I have a nice smooth no sqaure pixels.? I'm converting a video with avisynth so once it converts I can just burn the movie then.
I tried using some avis deinterlacing methods, but it was to slow. I need it to be able to convert the video if i use them methods. Can you help me out i'm stumped.?

[manono]

I notice videos I been watching always have pxiel's how to I take them pixels out of it so I have a nice smooth no sqaure pixels.?

Converting it to what? Converting it from what? If by 'pixels' you mean 'macroblocks, and if they're not in the source, it's just a question of bitrate. A small sample from the source and a small sample of the output, a sample that shows these 'pixels' (or at least a picture showing what you're trying to describe) might help also. If these 'pixels' are in the source, then a deblocking filter might help, at the cost of a smoother picture.

[sxpredman]

When I add Tweak(hue=0,sat=1.5,bright=0,cont=1)
cranking the sat up to 1.5 the color looks good but makes pixels blocks stick out.
How can I can the save sat color, and no pixels?

[jagabo]

Deblock() before cropping or resizing.

The fundamental unit of digital images and video is the pixel -- dots of color. You can't have an image or video without pixels. The problem you are referring to is called macroblock artifacts - visible 8x8 blocks that result from over compression.

[guns1inger]

I would probably look at the MSU deblocking filter over Deblock() in avisynth. I found it was OK for light artefacts, but yours sound more serious.

Note also that there is often a cost to other details in the video - i.e. the image will get softer overall.