Blackmagic Forum

What would be the best image to print on paper, for the purpose of simulating a high detail scene?
Does color matter? I'm thinking a big paper that is just alternating black/white dots, as precise as the printer can do.
Is there anything like this available?

maybe try this site:
https://www.northlight-images.co.uk/pri ... st-images/

I tend to use flowing water or leaves blowing in the wind to push the encoder.

That's what i do now, but it would be better to have something more controllable.

https://www.imatest.com/product/imatest ... art-color/

JB

BrydeSorensen wrote:That's what i do now, but it would be better to have something more controllable.

Well, it's that uncontrolable "chaos" which makes it a good test.

I don't think any static image would be as good.

That depends on what the purpose of the test is. If it's to push Blackmagic Raw to the limit it doesn't matter if it's a moving image or not as each BRAW frame is unrelated to the next.

If it's for testing long GOP encoding motion matters as images are computed between keyframes.

It's just for static testing. I need something more consistent than pointing it at threes and that i know pushes it to the limit consistently.

I could make my own sheet, just with alternating black/white pixels, but i'm not sure if that's the best.

BRAW isn’t like other codecs.

It’s based on what’s sharp and what’s not.

A wide shot of fine detail and a moving wide shot, but of fine detail will use the same amount of data.

A shot that’s out of focus of fine detail will use a lot less data. It doesn’t matter if it’s moving or not.

JB

There's a nice story about the early days of the Red One. Someone used it in the Southern U.S. (IIRC in Georgia), where you have those trees with a lot of plants on them hanging down like curtains.
That DoP used a WA lens and had deep focus in daylight, and it actually crashed the camera's OS, when it already worked very well everywhere else. They called it the 'evil tree' and somebody even jokingly suggested that Red should buy it, dig it out and plant it their headquarters for testing the codec.
Just like for BRAW, that's all you need. High-end cameras normally don't use GOP codecs, other than for proxies.

What would be the best image to print on paper, for the purpose of simulating a high detail scene (high bitrate)?

This.

Buy this. It’s one of the lower cost test charts you can buy. It’s designed to do exactly what you’re asking.

https://www.imatest.com/product/imatest ... art-color/

JB