Encoding in multiple resolutions from a single input file could speed up the encoding process if you want multiple outputs. I could be done by specifying multiple scaling factors, horizontal resolutions or vertical resolutions.
For example, if an input video has a 3840x2160 resolution, and scaling factors 1, 1.5, 2, 3 and 4 are specified, it would encode the video in 3840x2160, 2550x1440, 1920x1080, 1280x720 and 960x540.
Depends on #2.
Encoding in multiple resolutions from a single input file could speed up the encoding process if you want multiple outputs. I could be done by specifying multiple scaling factors, horizontal resolutions or vertical resolutions.
For example, if an input video has a 3840x2160 resolution, and scaling factors 1, 1.5, 2, 3 and 4 are specified, it would encode the video in 3840x2160, 2550x1440, 1920x1080, 1280x720 and 960x540.
Depends on #2.