Creates a single-job transcoding request instance for the given
source location, User-Agent string, specified transcoded content's
type and desired quality of a predefined profile selected by
"best matching" strategy algorithm.
Creates a single-job transcoding request instance for the given
source location, User-Agent string, specified transcoded content's
type and (optionally) size limit.
Creates a single-job transcoding request instance for the given
source location, User-Agent string, specified transcoded content's
type and (optionally) dimensions.
Creates a single-job transcoding request instance for the given
source location, User-Agent string, specified transcoded content's
type and (optionally) dimensions in the form of percentage of a device
screen size.