Hello All !
I've been reading with great interest about the patch developments.
I'm a D7000 guy and I'd like to contribute some info which someone (programmers ?) hopefully may find of interest.
Regarding the thermal cut out :
In short - the overheating issue is easily enough avoided.
There are two crucial conditions, though : built-in LCD is turned off (and no external LCD over HDMI is used).
As part of my job (http://www.RealGigReel.com
) I regularly record 720p stream for over 3 hours straight (in multiple back-to-back 20 mins segments).
I achieve up-to 3hrs 15mins of continuous recording on one fully-charged battery.
I operate the camera remotely using Camera Control Pro v2.8 over two (daisy-chained) active USB2.0 20metre extension cables.
This setup gives me an almost complete control over the cam, while I get the real-time video preview on my laptop.
Crucial part of this is that the moment USB is plugged in at both ends - camera's entire graphics display subsystem (video out amp + LCD)
is turned off outright. The preview video signal is encoded and streamed in real-time (ish) over USB thus not engaging at all the heat-producing power-hungry
graphics-out head and LCD hardware.
I start the video from within LiveView Software preview window by pressing "REC" software button.
The Camera Control Pro software window displays the remaining time counting down from 20 mins.
At appropriate points I simply hit the software record button twice in quick succession to finish one video chunk and initiate recording of another.
Crude though it is, it works well in practice and the resulting gap between the video segments is only about 1s long.
I have been using this setup for a full year now without a single fail due to (over) heat (ing)
Interesting thing to note is that it works for such (practically unlimited) long periods of time over USB only.
I tried long recording (multiple back-to-back 20min clips) using an external LCD display over HDMI but run into overheating after about 40mins of continuous recording.
This (somewhat logically) confirms that as long as any part of Camera's graphics display subsystem is active (in case of using an external LCD it's the internal graphics-out head)
the resultant heat will eventually cause a problem.
In USB-only scenario, much like IP CCTV cams, there's no analogue video being output from the camera at all.
Instead, the preview video data is being encoded in fairly low-quality (but sufficient enough for judging exposure)
and streamed live over USB to be decoded back inside Camera Control Pro for on-screen playback.
When running it like this - power draw (and thus - the heat) overheads are insignificant in comparison.
I hope this sheds some light (from the trenches) on the often misjudged causes for thermal cut-outs.
It's not the Sensor or the Encoder that is the culprit, it's the Display Subsystem.
Where can I download the v1.2 for D7000, please ?
I will definitely give it a go.