Why don't add such a wonderful floating tip with a short description of
the switch and not to revoke the possibility from a user?
Raphaël Quinet wrote:
> I think that this option is still useful. Maybe not for disabling it
> when it is enabled, but for enabling it when it is not enabled
> automatically. It is usually better to use the custom quantization
> tables if they are better than your default quality settings. But
> if they are not better, then it is nice to give a choice to the user.
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