Author Topic: Danne's crop_rec_4k & ISO experiments  (Read 20254 times)

ilia3101

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Re: Danne's crop_rec_4k & ISO experiments
« Reply #350 on: February 12, 2020, 07:00:12 PM »
I really want to add real 12 bit to the UHD preset.

Wish I knew how😭 @Danne didn't you mention there's comments somewhere about reducing bitdepth??

Danne

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Re: Danne's crop_rec_4k & ISO experiments
« Reply #351 on: February 12, 2020, 07:24:04 PM »
I don't think it's less real. Quality wise probably the same. What's your issue by the way?

ilia3101

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Re: Danne's crop_rec_4k & ISO experiments
« Reply #352 on: February 12, 2020, 07:31:12 PM »
I have no issue, but:

The black-white range with your gain adjusted 12 bit seems to be approximately 2047-5600 (max 16383)

With real 12 bit it will probably be 512-3800 (max 4095)

So it is effectively 12 bit.

But I suspect the compression algorithm can be slightly more efficient in true 12 bit mode.

I just got an excessive amount of stripes recently shooting in crop_rec 12 bit, which got me wondering about this.

Danne

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Re: Danne's crop_rec_4k & ISO experiments
« Reply #353 on: February 12, 2020, 07:45:29 PM »
A1ex explained from time to time about bitdepth routines. I can't find the posts right now. I don't think those stripes are related to bitdepth in crop rec but who knows.

ilia3101

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Re: Danne's crop_rec_4k & ISO experiments
« Reply #354 on: February 12, 2020, 07:55:36 PM »
Ok thank you. I wasn't saying I was certain that the stripes are caused by it. Probably not. The 5D3 is really quite stripy.

koopg

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Re: Danne's crop_rec_4k & ISO experiments
« Reply #355 on: February 16, 2020, 02:59:34 PM »
Can i go a bit off topic here ?
I hvae bought a KB 128Gb from amazon
I have used it twice and yesterday its simply died.
I want to buy a new card, but KB feesls like out of the question with this type of quilty.
So, is there anything else to use on a 5d3 with more or less the same speeds but more reliability ?
 Used cases are danna builds 3.5k raw o  a 5d3

Thanks

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Danne

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Re: Danne's crop_rec_4k & ISO experiments
« Reply #356 on: February 16, 2020, 04:10:09 PM »
How did it die?
I use transcend. Never failed.

Dmytro_ua

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Re: Danne's crop_rec_4k & ISO experiments
« Reply #357 on: February 16, 2020, 09:21:23 PM »
I use Lexar. Maybe it's not a top speed but a solid proof for many years
5d3 1.1.3 exp | Canon 16-35 4.0L | Canon 50 1.4 | Canon 100mm 2.8 macro
Ronin-S

koopg

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Re: Danne's crop_rec_4k & ISO experiments
« Reply #358 on: Today at 12:33:27 PM »
Thanks

How did it die?
I use transcend. Never failed.

Pressing record and its gone, will not recognize by any system

Can you tell me which type and does it do 3.5k with danne build ?

I use Lexar. Maybe it's not a top speed but a solid proof for many years

Same .. you are saying that its not top speed, but does it work with danne build 3.5k raw on 5d3 ?

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Walter Schulz

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Re: Danne's crop_rec_4k & ISO experiments
« Reply #359 on: Today at 01:16:21 PM »
If going Lexar 1066x: Take care, there are 2 versions: https://www.magiclantern.fm/forum/index.php?topic=24461.msg220607#msg220607

My KB card went dead some years ago and got replaced. No problems since. Same with my 2 Transcends.
Photogs and videographers: Assist in proof reading upcoming in-camera help!. Your input is wanted and needed!