Austin
2
Shotcut is great for this task. Aliasing happens when one or more of several things happen:
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The video mode of the timeline is different than the resolution of the clips being placed on it. That’s likely the issue here.
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The export resolution in the Advanced panel is changed to be larger than the timeline resolution.
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The encoder settings for export are such low quality that macroblocks appear.
Here is documentation on the first possible issue: