The mime.convs
file contains the filters that are used to convert files from one format to another for any given MIME type. Here CUPS basically tries to construct a valid filter chain from the beginning to the end, under the directive of the PPD. Also, every filter has a virtual cost attached to it. The syntax for each rule in the file is:
super/type(Source) super/type(Destination) cost filter
super/type (source): The super/type field for source is a MIME type that may use a wildcard for the super-type or sub-type (for example).
super/type (destination): The destination field is a MIME type defined in the
mime.types
file.Cost: The cost field defines a relative cost for the filtering operation. The value for cost ranges from 1 to 100. It is used to choose between two different sets of filters when converting a file.
Filter: The filter field defines the filter-program, which runs to convert the source MIME to destination MIME type. The special program "-"...