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Will test with my D7100. qDD only have control of the movie audio through the properties that are available in camera properties display under the movie category.

Sorry, seams I missed your post.
I already have OpenWrt for MR3020 here with ddserver included:
factory: https://drive.google.com/file/d/0BxMZ8X ... sp=sharing
sysupgrade: https://drive.google.com/file/d/0BxMZ8X ... sp=sharing

The params for LV filters are on my TODO list, no timeframe.

Yes I know that the camera can capture with 5 fps but while the camera is controlled over USB/wifi (PTP) it is working a bit different.
The camera will not allow to start a new capture while the started capture is finished (capture + write image to SD card).

I already think about his but had no time yet to try and implement it.
I hope in future version I could add a focus control if LV is active while in LRT.

No you don't need the WinUSB driver if you will only use wireless. It is only needed if you connect your camera with USB.

As far I know it will not work.
Unfortunately there is no documentation for developers from Pentax.
Maybe if they release some or if I get my hands on a Pentax I could add.

Focus peaking < yes there is
Over exposure/under exposure blinkies < not yet
Ability to control multiple cameras - maybe this should be a premium version < yes you can control multiple DSLR

You can test with the free Linux, OSX, Windows or Android version.

No, there is not such feature.
It is a delay from camera, it needs time to write the capture image to the SD card.

Your camera model?
What was the camera focus mode?
The focus button where red meaning you defined a focus point?