Author Topic: Danne's crop_rec_4k & ISO experiments  (Read 21957 times)

koopg

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Re: Danne's crop_rec_4k & ISO experiments
« Reply #375 on: February 19, 2020, 05:30:55 PM »
I woukd like to add
If you remember in the begging of the week
I told you my card die
It was a cf card
And after  a few tests o wanted to format the card to record my actuall takes
So i format it and %×@@#@ a big explotion happend
No just kidding, no explotion just a died card

Could it be a good tip to not format the card?

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IDA_ML

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Re: Danne's crop_rec_4k & ISO experiments
« Reply #376 on: February 19, 2020, 06:26:32 PM »
Getting quite certain it's reliable now.

Ilia3101,

Indeed it is very reliable.  I shot tons of footage with card spanning ON, (SD-overclocking OFF), over the weekend and never had a glitch.  Moreover, it is very user friendly too.  You activate card spanning just once and forget about it.  In the end of the shooting day, you just dump the content of both cards in the same directory and forget about merging too.  MLVApp just does the rest and never complains.  Safe and reliable SD-card overclocking, as in the 100D and EOS-M, is the only thing needed to make card spanning perfect.  If that is not worth it, I don't know what is.

koopg

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Re: Danne's crop_rec_4k & ISO experiments
« Reply #377 on: February 19, 2020, 08:41:14 PM »
I would like to try and correct my bad english.

I lost (died) a card (CF KB128GB) this weekend due to a format (usnig canon manu)  when the card was full.
After format the card it became un accessable from any system.

Was testing a scene, recorded few sampales
And for unknown resone I got a massage saying card full
I didnt gave it much thinking and went strait to format it from canon manu.

Maybe formating the card right after recording is a bad move ?
And a shutting off the camer and let is rest before  would lead diffrent results

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ilia3101

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Re: Danne's crop_rec_4k & ISO experiments
« Reply #378 on: February 20, 2020, 06:18:48 PM »
Bug report: when recording uncompressed 12/10 bit, the white level metadata is always set to 16200 (that value is only suitable for 14 bit)

IDA_ML

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Re: Danne's crop_rec_4k & ISO experiments
« Reply #379 on: February 20, 2020, 07:19:15 PM »
Good news guys!  This morning I decided to test some spanned card footage with MLVFS to use it with DaVinci Resolve directly.  And it works absolutely fine.  I tested anamorphic 1920x2332 and 3k 1:1 3072x1728 at 24 fps and 10, 12 and 14 bits lossless and Resolve crunches it like cereal for breakfast.  Average export times of the processed video on an i7 laptop with a 4 GB of RAM GPU are 7,5 to 9 fps with Davinci Resolve Lite 16 using the MPEG4 export format at the original resolution.  This card spanning functionality is a real break through for the 5D3!    Thanks so much, everyone involved!

Danne

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Re: Danne's crop_rec_4k & ISO experiments
« Reply #380 on: February 20, 2020, 07:57:21 PM »
Bug report: when recording uncompressed 12/10 bit, the white level metadata is always set to 16200 (that value is only suitable for 14 bit)
That is a problem also with official experimental builds?

ilia3101

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Re: Danne's crop_rec_4k & ISO experiments
« Reply #381 on: February 20, 2020, 08:35:42 PM »
I don't know. But it's caused by line 3081 in mlv_lite.c - just comment it out and everything is fixed - it makes the wrong assumption that if crop_rec bitdepth is not set, that the image must be 14 bit:

Code: [Select]
    if (!bitdepth) raw_hdr.raw_info.white_level = 16200
https://github.com/ilia3101/mlv_lite_spanning/commit/033c0d4801043b0d2e31ae101854fabbd40616f9


@IDA_ML Great!

Danne

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Re: Danne's crop_rec_4k & ISO experiments
« Reply #382 on: February 20, 2020, 08:46:12 PM »
So you record uncompressed 12 or 10 bit plus adding reduced bitdepth in crop rec?

ilia3101

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Re: Danne's crop_rec_4k & ISO experiments
« Reply #383 on: February 20, 2020, 09:03:46 PM »
No, just uncompressed 12/10 bit set from mlv_lite.c - without setting bitdepth in crop_rec (set to OFF).

Danne

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Re: Danne's crop_rec_4k & ISO experiments
« Reply #384 on: February 20, 2020, 09:22:35 PM »
I see. Will check it. Never used uncompressed since lossless came into the picture.

ilia3101

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Re: Danne's crop_rec_4k & ISO experiments
« Reply #385 on: February 20, 2020, 09:33:34 PM »
I never use it either. I was just generating some files to test LibMLV.

Dmytro_ua

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Re: Danne's crop_rec_4k & ISO experiments
« Reply #386 on: February 21, 2020, 11:04:35 AM »
Is there any SD vs CF size proportion recommended? For example, if I have 128Gb Lexar CF what size SD card should I buy? I assume there is no any reason to buy 128 SD card?
5d3 1.1.3 exp | Canon 16-35 4.0L | Canon 50 1.4 | Canon 100mm 2.8 macro
Ronin-S

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Re: Danne's crop_rec_4k & ISO experiments
« Reply #387 on: February 21, 2020, 02:06:13 PM »
you should be fine with a 64gb sd card, but there's nothing wrong with having extra capacity!

the 170mb/s sandisk extreme pro is almost cheap on amazon...  it works beautifully for me!