Note: To maintain consistency, this thread will be locked, and only moderators will be able to post and update the list.
What software and tools do I need to get started?
Are there any guides to help me get started?
How do I install AviSynth and/or VapourSynth?
Preparing Source for Editing
What is the best method to prepare source videos for editing?
What is 10-bit color and how can I find out the color depth of my source?
What is recontainering and how do I do it?
What are AviSynth and VapourSynth and how are they different?
Fixing Visual Defects in Source
DirectShowSource is not working correctly, how do I fix this?
What do I do when I open MP4/MKV files in VirtualDub and I see visual blocking/artifacts or the screen is gray/green?
My source video has aliasing/banding/grain/interlacing/mosquito noise/etc, how do I fix it?