Author Topic: Capturing thermal camera video?  (Read 693 times)

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Offline nfmax

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Capturing thermal camera video?
« on: June 25, 2020, 11:23:05 am »
I have bought one of the recently-advertised NOS Raytheon 2000AS imager cores, which outputs video in 'NTSC' format (actually monochrome, no colourburst is present) and this displays nicely using the composite video input of a monitor. However, I would like to capture it for analysis (motion detection) and recording, on an Apple Mac. I bought a Video-to-USB 2.0 converter advertised as doing the job, but unfortunately it suffers from a problem where the video freezes for a second or so every few seconds, before springing back to life. This effect doesn't occur when the video is displayed using the monitor.

The converter advertises itself on USB as an Empia Technologies EM28284. I'm connecting it to a USB 3 port (as that's all I have) on a MacBook Pro running Mojave.

Since it doesn't work I'm returning it for a refund. Does anyone have any suggestions for alternative products that are known to work?
 

Offline Bill W

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Re: Capturing thermal camera video?
« Reply #1 on: June 25, 2020, 01:00:13 pm »
I use Hauppauge WinTV's as the most reliable, and OK for Win 10
Some early Hauppague had motion detection programmes available, I have not kept up with what is about nowadays.

I have also used 'EzCap' but these are all China copies that have variable internals (and so drivers) and so far mine are only OK to Win7

I have no idea how any of those go in the 'Mac' universe

regards
Bill

Offline Flukav

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Re: Capturing thermal camera video?
« Reply #2 on: June 25, 2020, 04:09:56 pm »
Hi,
I also used the EZCap cheap copy from eBay. Works like a charm with VLC Media Player. Ticking extra device setting in Ā«video deviceĀ» capture menu pops up a selection pane where you can choose framerate, compression system, resolution and buffer size.
If your device works out of the box, you might have a look with VLC and squeeze some settings.
 

Online Fraser

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Re: Capturing thermal camera video?
« Reply #3 on: June 25, 2020, 05:45:03 pm »
I went down the ARCHOS mini PVR route with their mobile entertainment platforms. They are cheap as chips these days and provide a combined composite video record and playback capability on the integrated screen. They used to be expensive, but not anymore if you look on eBay for a used unit.

Fraser
« Last Edit: June 25, 2020, 11:15:50 pm by Fraser »
 

Offline IwuzBornanerd

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Re: Capturing thermal camera video?
« Reply #4 on: June 25, 2020, 09:55:25 pm »
I have one of the Chinese EZCap units with a Syntek STK1160 chip which I used for a while about 4-6 years ago with several NTSC "security" cameras and the "motion" surveillance package on Debian Linux, so there is a chance it would work with a Mac.  I don't recall any significant issues except that it did not work well when I first bought it about 10 years ago.

I recommend checking recent user reviews to see if any of them talk about using the thing with a Mac.
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Offline Ultrapurple

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Re: Capturing thermal camera video?
« Reply #5 on: June 26, 2020, 07:55:30 am »
I have used similar devices (albeit on Windows systems) and it seems to be pot luck whether you get one with a good chipset - I think there are at least two sets of silicon out there and there's nothing on the outside to say what you're getting.

I agree that VLC's extra options can let you get most of them working but it can be a bit hit-and-miss while you work out the right combinations. It's also worth knowing that video capture can take a while to start - ten seconds or more in some cases. I don't know why this is, because there isn't a corresponding lag in the capture.
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Offline nfmax

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Re: Capturing thermal camera video?
« Reply #6 on: June 26, 2020, 09:20:42 am »
One weird thing about the capture device I sent back: it did not appear as either a camera or a video USB device in System Report - only as a USB audio device. It required a manufacturer's 'driver' to be installed, but I gather that in fact the chip used should have been USB Video Class Device compliant, so the built-in macOS driver should have worked.

Many similar devices on Amazon carry the warning 'does not work on MAC', or only up to macOS 10.13 - although I suspect this may be the editing/capture software, not the frame grabber itself. They never say if they are UVC compliant, or what the chipset used is. It makes buying a total lottery.
 

Offline Bud

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Re: Capturing thermal camera video?
« Reply #7 on: June 26, 2020, 05:18:14 pm »
That is because the Amazon sellers are random re-sellers, not the manufacturers.
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Offline IwuzBornanerd

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Re: Capturing thermal camera video?
« Reply #8 on: June 29, 2020, 08:37:59 am »
One weird thing about the capture device I sent back: it did not appear as either a camera or a video USB device in System Report - only as a USB audio device....They never say if they are UVC compliant, or what the chipset used is. It makes buying a total lottery.

This is why I recommend searching reviews for reference to "Mac".

HOWEVER... I did that.  I chose several EZCap units with hundreds of reviews  & got 10-20 references to Mac in each one.  Most said they got it to work in Catalina,, but some did not.

Interestingly, one reviewer for this one, https://www.amazon.com/REDGO-Video-Capture-Converter-Adapter/product-reviews/B01E5ITE2W/ref=cm_cr_arp_d_viewopt_srt?ie=UTF8&reviewerType=all_reviews&pageNumber=1&filterByKeyword=Mac&sortBy=recent said it showed up only as audio on Mojave.

One more reason for looking at the reviews is that sometimes the reviewers will say what they found that worked better, and one reviewer on another EZCap said this unit worked on his Mac & the mfr says it works on Mac but is over 80USD:
 https://www.amazon.com/Elgato-Video-Capture-Digitize-iPad/product-reviews/B0029U2YSA/ref=cm_cr_arp_d_viewopt_srt?ie=UTF8&reviewerType=all_reviews&pageNumber=1&filterByKeyword=Mac&sortBy=recent
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