DSLR camera for live, continuous uncompressed HD video over HDMI

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markaren1
Posts: 40
Joined: Sat Sep 10, 2011 8:49 pm

DSLR camera for live, continuous uncompressed HD video over HDMI

Postby markaren1 » Fri Apr 21, 2017 12:45 am

Hello all,

Am contemplating buying a DSLR camera.

Really would like a unit which could be used *just* as a live video source, as well as a traditional camera.

Looking for uncompressed 720P (or higher) over HDMI, from a camera which will not close down after a few minutes idle.

Also needs an external mains power pack (in place of the battery ?).

So basically, it can double as a DSLR, or a video camera.

Budget < NZ$600, so probably not currently in production.

Thoughts please ?

Thanks, Mark

VK5YYY
Posts: 22
Joined: Sun Sep 27, 2015 1:47 am

Re: DSLR camera for live, continuous uncompressed HD video over HDMI

Postby VK5YYY » Fri Apr 21, 2017 2:02 pm

Hi Mark

I had that thought too, ahhh a nice camera with live HDMI output with sound and video, can't be that hard
Well after googling and consulting a bunch of experts that's not how it goes
Most units have ability to record and then payback HDMI, there is box CCTV cameras with live HDMI output, Gopros and DSLRs have no live output
You can get professional video cameras that output SDI (uncompressed MPEG serial format) that can be converted to HDMI they start at around $3000AUD and other units that just output SDI video and not sound that are used in the movie making world where audio and video are done separately

Turns out the best bang for buck live HDMI output device is a Canon HV-20 or HV-30 Camcorder circa 2006
They have the old Mini DV tapes, but the video output is very good live HDMI and the on screen info can be removed for "clean HDMI"
You can take stills with them too
Please somebody correct me if I am wrong, clean HDMI live output at a reasonable price was a brief moment in history
You can pick up HV series Canons for $100-300AUD on Ebay just remember US version are NTSC
I've got one for $120 it still works fine, one of my best investments

Cheers Roger VK5YYY

markaren1
Posts: 40
Joined: Sat Sep 10, 2011 8:49 pm

Re: DSLR camera for live, continuous uncompressed HD video over HDMI

Postby markaren1 » Fri Apr 21, 2017 4:09 pm

Thanks Roger,

I was afraid you were going to say what you did, as that tied up pretty much with my research, then I found this http://www.nikonusa.com/en/learn-and-ex ... hdslr.html which surprised me. Just wondering if this only applies to their professional range.

Priority 1 of this project is to get a decent DSLR. Clean, live video out would be a (significant) added bonus.

Also, just found http://simeonpilgrim.com/nikon-patch/nikon-patch.html Simeon has been working on adding features to 'low cost' Nikon DSLRs by patching the firmware.

Firmware for Nikon D5100 version 1.01
◦Remove Time Based Video Restrictions
◦Liveview Manual Control ISO/Shutter
◦Clean HDMI & LCD Liveview
◦Video 1080 HQ 36mbps Bit-rate
◦Video 1080 HQ 54mbps Bit-rate
◦Video 1080 HQ 36mbps Bit-rate NQ old HQ
◦Video 1080 HQ 54mbps Bit-rate NQ old HQ
◦NEF Compression Off
◦NEF Compression Lossless
◦Disable Nikon Star Eater
◦BETA - True Dark Current
◦BETA - True Dark Current - Menu based
◦Jpeg Compression - Quality (vs. Space)
◦Non-Brand Battery

Still unclear if the HDMI output is in-the-clear, or encrypted. Also, unsure what HDMI compliance stream testing (if any) has been conducted. Any other questions/issues I should be thinking about ?

Added bonus is that he lives in the same city as me, in NZ (small world huh).

Regards, Mark
ZL3JVX, KE6LVK, G8JVX, etc.
digilite-ZL

VK5YYY
Posts: 22
Joined: Sun Sep 27, 2015 1:47 am

Re: DSLR camera for live, continuous uncompressed HD video over HDMI

Postby VK5YYY » Mon Apr 24, 2017 1:13 am

Hi Mark

I was told by one of the experts I consulted talked about hacks for DSLRs
Most of them involved wiring a DIY interface to the camera and updating firmware
Having pulled a few cameras apart I can't see myself buying a new camera only to pull it apart
Then wiring a cheesy looking looking interface to it, that sounds ordinary
Worst of all risking "bricking" the camera with homemade firmware puts me right off

Once you've got Simeon to upgrade your low cost Nikon, he can do one for me too!
I'm surprised no one else has posted any ideas, keep us posted how you go

Cheers Roger VK5YYY


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