Batch encode tests from last night:
* 480p, 1080p to AV1 at crf 20
* 480i, 1080i deinterlaced to double frame rate, then AV1 at crf 20
* 2160p to HEVC at crf 18
ratios of original to new output file size (audio and subtitle tracks are kept untouched):
pitch perfect 480p - about 3:1
pitch perfect 2 1080p - about 3:1
pitch perfect 3 2160p - about 5:3
max headroom 480i - about 3:2
blake's 7 scaleup to 1080i - about 4:1