Both Nikon and Olympus have announced firmware updates for cameras in their current line-ups.
Nikon’s updates apply to its D750 (above) and D4s DSLR cameras, in each case adding an external recording control option to the HDMI item in the SETUP MENU. When the camera is connected via HDMI to a third-party recorder that supports the Atomos Open Protocol, selecting On allows camera controls to be used to start and stop recording. The new firmware also includes a number of bug fixes.
Details of these and a link to downloading Firmware v. 1.10 for the D750 can be found here.
Olympus has released Firmware v. 2.1 for its OM-D E-M5 II. The new firmware fixes a bug that affected the Touch AF display on Olympus Capture when recording movies using Olympus Capture version 1.1. It also corrects problems associated with electronic zoom lenses.
A link to this firmware can be found here.