The Record Control in version 15.08.3 only allows to select "Webcam" or "Screen Grab" as a capture source. 
In earlier versions it was possible to caputre from a Blackmagic device. When clicking on "Configure Recording" there is still a tab with the title "Blackmagic" and I selected "Blackmagic card" as the default capture card, but the new Record Control only allows to select from "Webcam" or "Screen Grab".

Reproducible: Always

Steps to Reproduce:
1. Open Kdenlive
2. In Clip Monitor click on the "+"-Symbol with the tooltip "Show Record Control"
3. Open capture device drop-down and see only "Webcam" and "Screen Grab"
4. Click on "Configure Recording"  and select "Blackmagic card" as the default capture device
5. Click on the "Blackmagic" tab and confirm capture settings
6. Realize that "Webcam" and "Screen Grab" are still the only options for recording

Actual Results:  
Record Control only allows to select from "Webcam" or "Screen Grab".

Expected Results:  
Record Control should allow to select other input devices as Blackmagic card or DV device and respect the default capture device setting.

$ pacman -Qi kdenlive
Name                 : kdenlive
Version              : 15.08.3-1

About Dialog:
Kdenlive Version 15.08.3
KDE Frameworks 5.16.0
Qt 5.5.1 (compiled against 5.5.1)

Kernel 4.2.5-1-ARCH

lshw output:
           *-multimedia
                description: Multimedia video controller
                product: Intensity Pro
                vendor: Blackmagic Design
                physical id: 0
                bus info: pci@0000:03:00.0
                version: 00
                width: 64 bits
                clock: 33MHz
                capabilities: pm msi pciexpress bus_master cap_list
                configuration: driver=blackmagic_driver latency=0
                resources: irq:18 memory:f6900000-f69fffff memory:f6800000-f68ff

Using driver from Blackmagic_Desktop_Video_Linux_10.5.2.tar.gz compiled locally.
Vendors own capture application Blackmagic Media Express is able to capture.