vhs-bordercontrol, telecide() and (ml)degrain in vapoursynth

[Selur]

what did i expect and what would be the proper way:
-crop 16 pixels
-letterbox ie add 16 black lines on bottom
-upscale

Then you can't use Hybrid.
Hybrid does not support a random order for crop, rotate, resize, letterbox.
The order needs to be always: crop < rotate < resize < letterbox.

you take 480x576 source and crop xx pixels from the bottom (if one selects cropping and inputs the number)
you then upscale to desired resolution, and in doing so you're skewing the aspect ratio of the video, because you didn't add black borders to fill it in untill it's 576 again

That will only affect the DAR not the PAR, PAR does not change by resize.
If you want to go from anamorphic SDR to HDR, you should:

• crop all the black bars
  
• make sure the input par is correct
  
• let Hybrid know you want to convert to a 1:1 output PAR
  
• adjust the height or width to your desired target (let auto adjust, adjust the other)
  
• use letterbox to archive the desired output resolution
  

Cu Selur