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Using Magic Lantern => Raw Video => Topic started by: codemonkey on July 09, 2019, 10:30:34 AM

Title: Exporting dng uncompressed with hdr gives me flickering in resolve
Post by: codemonkey on July 09, 2019, 10:30:34 AM
I use the free version of Resolve on Linux. 

So, when I play in mlv app I get a get a lot of flickering(due to me accidentally recording in hdr)

When I export to something like prores 4444 with hdr checked in the export settings. It plays fine(no flickering) and no flickering in resolve. But when I export to dng uncompressed with the hdr checked in the export settings, in resolve I get the same flickering...
Title: Re: Exporting dng uncompressed with hdr gives me flickering in resolve
Post by: masc on July 09, 2019, 10:41:21 AM
Sure. Is expected. When exporting as cdng (=RAW), you have to blend the frames. When exporting ProRes, MLVApp does it for you (via ffmpeg).
Title: Re: Exporting dng uncompressed with hdr gives me flickering in resolve
Post by: codemonkey on July 09, 2019, 11:43:44 AM
Can I make mlvapp blend the frames for dng uncompressed
Title: Re: Exporting dng uncompressed with hdr gives me flickering in resolve
Post by: masc on July 09, 2019, 11:51:05 AM
No, you can't. cdng is RAW. Blending is not possible for RAW, because it is no more RAW then. A special case is DualISO - here we create new cdng's - but you'll need a lot of time.
Title: Re: Exporting dng uncompressed with hdr gives me flickering in resolve
Post by: codemonkey on July 09, 2019, 12:20:15 PM
Is that how the hdr works with on thre 5d3 is dual iso? i saw the option on the camera. I tried dual iso too, but it really messed stuff up. 
Title: Re: Exporting dng uncompressed with hdr gives me flickering in resolve
Post by: Walter Schulz on July 09, 2019, 12:25:50 PM
https://wiki.magiclantern.fm/camera_help#hdr_video
https://wiki.magiclantern.fm/camera_help#dual_iso
Title: Re: Exporting dng uncompressed with hdr gives me flickering in resolve
Post by: codemonkey on July 09, 2019, 02:24:39 PM
Thanks.

is there any way to get rid of the hdr? I didn't mean to do it to begin with so I don't care if I get rid of it.
Title: Re: Exporting dng uncompressed with hdr gives me flickering in resolve
Post by: masc on July 09, 2019, 02:32:51 PM
What do you mean with "get rid of"? If you choose to process HDR you have to do it somehow. So:
- switch it off in camera
- leave it on in camera and process it e.g. with MLVApp to any non-RAW format (ProRes,...)
- leave it on in camera and find or create a own workflow how to process it
Title: Re: Exporting dng uncompressed with hdr gives me flickering in resolve
Post by: dfort on July 09, 2019, 11:55:10 PM
You can have all the odd frames go into one directory and the even frames go into another directory. It should be pretty easy to write a script that can do this. Then you'll have to decide which exposure is better, the dark or light one. Hum--exposure bracketing while shooting video? Of course then you'll need to do something to adjust the speed since you're using only half the number of frames.
Title: Re: Exporting dng uncompressed with hdr gives me flickering in resolve
Post by: Stousen on July 21, 2019, 01:32:56 PM


Is it the same like I have here? I don't have HDR on, but doing some dual-iso tests.
Max iso here is 800, but I have this weird black wavy lines moving. Might be the electrical light? Shutterspeed is set to 1/54.
Grateful for any input.

Cheers

//Chris
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