What is the difference between [High-Speed mode] and [Encoding mode]?
With [High-Speed mode], you can quickly cut videos without converting (encoding) it and without decreasing the quality.
With [Encoding mode], you can convert (encode) videos according to your configuration (codec and quality) but the process takes some time. » [Encoding mode] Details...
There is [High-Speed mode] and [Encoding mode] for output.