HDMI input for pi 4

[nathanlitjens]

Hi everyone. This is my first post and I am looking at using a pi 4 for wildlife monitoring, combining ultrasonic samples with images from a hdmi connected, sensor triggered dslr as required. My thought was to get screen captures from each sensor trigger event to assist with matching up images.

How can I connect the camera to feed images into the pi? Any ideas? Thanks!

[Burngate]

... images from a hdmi connected, sensor triggered dslr ...

The Pi has no hdmi input, so you cannot grab images from the dslr that way.

The second hdmi socket is a second hdmi screen output

[nathanlitjens]

Older Pi models had hdmi input boards that could be integrated?

What about a HDMI to USB adapter that works as an input? Would that be a solution?

Thanks

[scotty101]

Why do you need an HDMI link for still images?

Does your camera not have a USB port for getting the photographs from the device? This is likely to be much simpler than having to use an HDMI capture device which you have to decode/capture/store.
Leave the camera to create the image files and just fetch them via USB.

Use the timestamp to synchonise the trigger events with the images.

[nathanlitjens]

Thanks,

The idea was to create a bundle of data, I need an image to allow for cross referencing the image in that bundle to a full resolution image that is on the camera. So I need both.

I find it odd that there are 2 HDMI OUT ports instead of one in and one out.

[fruitoftheloom]

Thanks,

The idea was to create a bundle of data, I need an image to allow for cross referencing the image in that bundle to a full resolution image that is on the camera. So I need both.

I find it odd that there are 2 HDMI OUT ports instead of one in and one out.

It is very expensive to incorporate HDMi In, hence why 3rd party hardware is not cheap, around $50 for a Chinese offering and $150 or more for a quality branded product.

Therefore every RPi buyer would be subsidising a small minority who feel that this feature is essential:

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