Render RAW sequence into 10bit Prores?

Software darktable
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1

Hello,

I wonder is possible to render one sequence into 10bit proress (ffmpeg) to bypass the separate export process of all images and then import in editor.

I saw an older way but was only working for 8bit h264

Any ideeas?

Here is a sample footage that i captured with my smartphone and converted from Darktable:

Thanks

2

I think you can automate the ffmpeg conversion, but I don’t think you can get around exporting files to disk from darktable.

3

there was an old lua script, but as i said was only for rendering images then making clip, i would like to bypass that, to render straight to prores file

4

I haven’t a clue about this really, but sounds like something @hanatos might be interested in?
vkdt handles video I think… apologies if I’m off the mark.

5

DT, is faster and faster and now that we can raw video capture, i found it much better raw processor then other video raw processor app, so yes i am looking for ways to improve this workflow.

I am sure should be possible to render from a DT raw Sequence directly into a ProRess (ffmpeg) container, without converting first into 8bit images or 16bit tiffs which takes a lot of space

6

That something is possible doesn’t necessarily mean you’ll find someone willing to donate their time and effort to make it happen if it isn’t something they would need/use themselves. As mentioned, hanatos does have an interest in video, so that project may be more aligned with your needs.

Other than that I believe you can trigger a lua script after each image export so it might be possible to use ffmpeg to add it to a growing container and delete before starting the next export, meaning you wouldn’t have all images on disk at the same time. @wpferguson ?

7

Ofc,

I am sure i will find someone who will see the value in this…

I want to bypass this step of rendering sequences of images, when it could directly be transferred into a mov container.

Here is another sample processed with DT for RAW video purposes

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8

Out of interest, what format are the files from the camera in, and do you need to convert them before opening in dt? Results certainly look good.

9

right, vkdt has an ffmpeg output format you can select in the gui that will write h264 streams. it also reads .mov containers or magic lantern .mlv raw video for real-time display/processing in the gui, but it sounds like the image sequence mode is more what would be required by the op here? the raw loading module supports reading IMG_%04d.DNG kinda filenames and will load a bunch of images as animation. you can grade/keyframe this in the gui and then export to h264 via ffmpeg.

would be curious to hear how that works for you if you try. i suppose the ffmpeg output format might require some extra parameters exposed in the gui to write exactly the required format or so.

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10

dng files

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11

as i recall, i did tried that lua script in the past, but was not beneficial because it does something that i want to avoid…

I dont want to render images and after create the clip, what i want is to straight send from DT into mov container.

In this moment the workflow is: i am exporting as exr that can hold 16bit files where quality is lossless(but always needs more space and time), if i would choose jpegs quality would be limited to 8 bit which would be a fail.

Thanks

12

I didn’t think vkdt used lua? @hanatos is talking about the new software vkdt, not darktable.

15

i understood, trying to find out what vkdt can do more. thanks

IS there any working example of this app? to understand more what it does?

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16

Yes, it is working… certainly on Linux at least.
I’ve used it, on a dual boot system, but I’m not at present.
It’s very fast but needs a GPU.

I’m no authority on it though!

https://vkdt.org/

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17

And its own category on the forum: vkdt - discuss.pixls.us

2 Likes
18

thanks guys, i will check it out x

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