The resolution the first time I rendered the video was set much higher than the resolution of the input files. I saved the project after rendering. On subsequent renders I set the resolution to match the resolution of the input files but the edges of the video are missing.
If I open a new project and import the same source file with resolution set to the resolution of the input file, it renders perfectly. If I add the same source file into the original project a second time it works perfectly but the original copy of it still renders with the edges missing.The differences are also visible in the preview.
How do I clear Blender's memory of the initial bad resolution choice so that it doesn't crop when rendering? I am trying to avoid having to do the editing from scratch.