From the CBA Awards T&Cs: "New Members who opt-in to Qantas Frequent Flyer Direct within 3 months of being enrolled in Commonwealth Awards can elect to redeem any accrued Commonwealth Award points for Qantas Frequent Flyer points in accordance with these terms and conditions"
That's the only circumstance you can transfer already accumulated CBA points to QFF points, as far as I can tell. If the card is more than three months old, then existing points can't be transferred to QFF but new points can be direct sweeped into QFF at 2:1 for a $10/year fee.
It is possible to transfer them to Velocity at a 2:1 conversion rate, though.