[HELP] Loss of x264 options when selecting a preset

[Selur]

Okay, here's what's happening when applying the 'very slow' preset (slightly simplified).

• Hybrid applies the 'default/medium'-preset (since all other presets are based on it).
  
• Hybrid applies the specific changes of the 'very slow' preset, that differ from the 'medium/default'-preset:
  
  --b-adapt 2 --bframes 8 --direct auto --me umh --merange 24 --partitions all --ref 16 --subme 10 --trellis 2 --rc-lookahead 60
• assuming 'x264->Misc->Main->Minimize command line' is enabled, which is the default, Hybrid then:
  • checks which preset best covers the current option
    
  • replaces these option with the '--preset <presetName>'
    
  • check whether the rest of the parameters are covered by a tune option, if a tune option fully overlaps with the remaining parameters (doesn't usually happen), then hide those parameters by replacing them with '--tune <name of the found option>
    
  • hides all options which are covered by the 'medium/default' preset which do not interfere with the previously selected preset and/or tune option.
    

-> If you want to see the full x264 command line and don't want those simplifications of the commandline parameters simply disable 'x264->Misc->Main->Minimize command line'.

The options you are 'missing' are simply changed to the application of the preset. Applying a preset in x264 differs from applying a tune option, it always means applying the 'default/medium'-preset and then applying the additional changes of the selected preset. (This is how the x264 developers, same for x265, designed it; this is not a Hybrid thing. )

I hope this explains what happens to the options you thing are going missing.

Cu Selur