How do you get around the video mode 29 min 29 sec auto shut down point. (sometimes a cool down point) I've heard things like using the HDMI out to monitor & turning off the cameras LCD, will work, etc.
My understanding is that the 29 min limit is a European tax issue, not a technical issue. European tax laws categorize any camera capable of 30+ minutes of continuous video to be a video camera, and those are taxed at a much higher rate than still cameras. Thus most (all?) DSLRs are artificially limited to 29 minutes of continuous video.
Years ago heating and other technical issues also came into play, but those issues have long since been solved regarding video durations.
---------+---------+---------+---------+---------+ Joseph K Seattle, WA, USA
I though it was due to the maximum 4GB fat 32 file size limit. Computers capturing video would keep track of those breaking points and catalogue the files to playback seemlessly. I just assumed that was beyond a camera's processing powers, unless heat is still an issue
Scott Chapin Powder Springs, GA, USA Nikonians Team Member
Sure. Just capture the HDMI output with an external recorder, it works fine. There's a few settings to muck about with, but only a handful, and it's easily accomplished. There are some very cost-effective solutions available, such as the Atomos Ninja 2, which uses standard computer HDDs.
That's (HDMI out to external recorder) about the only way to do it. My take is that there really is no issue with heat; as mentioned, the limit is an EU import tax issue. There's folks posting in the video forum about recording for 2+ hours in 85+ degrees F, with no issue from overheating.
This is great info guys. I was hopeing to find some D800 users that have delt with this subject. All this info is very helpful and give me what I need to run some tests. I Hope to see more on this subject... and post some of my tests.
I ran some tests and it does indeed appear that you can stop & restart before 30 min & keep recording (I just did 3-29min tests back to back on battery).
I got off track from some comments a year ago when I bought my D800 about heat build up shut off... and then I experienced it this Spring when I used the D800 in the movie mode the first time and it kept shutting off. I now think it may have been some batteries I bought outside the U.S.A. as I just had one do the same thing again. (lesson learned... don't use off brand Nikon Batteries)
I was going to go with a good 5-7" HDMI monitor with under scan but if I do... I'm 1/2 way to a atomos/ninja with many hrs record time plus 2/4 audio track w/meters. Not sure what to do.