![]() LRTimelapse then writes out all those changes into the XMP sidecar files for the last time, you have Lightroom read the final Develop values back in for the original raw files, and then you use a special LRTimelapse Export preset to render all those frames to a video file. The whole program is sort of a super Match Total Exposures. LRTimelapse can also apply adjustable flicker removal, which can be very important to smooth out the exposures from some cameras and lenses. LRTimelapse is very good at compensating for things like if you changed the shutter speed three times during the time lapse to avoid overexposing a 3-hour sunrise. You save the metadata back into the frames and have LRTimelapse read the updated metadata, and it interpolates the intermediate values for all of the images between the keyframes, and writes its edits into the metadata for all of the images. It's no problem to apply an idea such as "I'd like to gradually shift the color temperature across this time lapse " just set the Temperature values of the start and end keyframe images in Develop. LRTimelapse then uses metadata to mark the keyframes in XMP sidecar files, then you read the metadata changes into Lightroom and use the Develop module to edit the parameters of just those images. You tell it how many keyframes you want between the start and end of the time lapse if you only need two different Exposure values at the beginning and end, that's two keyframes, but if you wanted another change in between you'd add three. The basic idea behind LRTimelapse is the use of keyframes and XMP metadata. And it's perfect for the original problem in this thread, because it can ramp most of the sliders in Lightroom. I think it's very clever and well-executed. If you try it, let us know how it turns out! I don't know if this will give you satisfactory results, but I think it will eliminate the stair-stepped brightness. So you could use Quick Develop's Exposure buttons to make the same relative increase or decrease in Exposure to all the pics at the same time: ![]() LR's auto exposure can make pics a stop or so too bright. Apply the "Zero Basic Tone Except" preset using the Saved Preset dropdown to clear all except the Exposure slider: Do Library > Build Standard-Sized Previews to work around a nasty LR bug.ĭ. In grid view select all the pics and apply Auto Tone using the Quick Develop panel:Ĭ. Define a develop preset "Zero Basic Tone Except" that sets all the Basic Tone sliders to 0 except exposure:ī. But it takes a little bit of a song and dance routine:Ī. You could use LR's auto-tone to automatically adjust just the exposure of each pic based on the actual pixels, which should adjust the pics to have about the same brightness. Match Total Exposures looks at the camera settings and slider only, not the actual pixels of the pics.Ģ. You could try the Settings > Match Total Exposures command in Develop, but it's not likely going to help, since it's going to adjust all the photos to have the same effective exposure value (ISO, shutter, aperture, exposure slider), and you'll likely still see the stair steps in birghtness. If no one else has a better suggestion, here are a couple of ways you might try for getting all of the pics to have about the same brightness (which may not be exactly what you want):ġ. But I was wondering if anyone knew how to do it automatically. This can of course be done manually, increasing the exposure of all pictures one by one. Like that, the whole 100-picture sequence would have its exposure gradually increased, so that, by the end of it, it would be bright enough so as to smoothly match pic101 and its ensuing sequence. For example, " at every 01 picture, increase exposure by +0,01 for the first 100 pictures". I figured this could be solved if there was a way to instruct Lightroom to change a specific attribute by a certain amount at every picture. This is because all pictures 1 to 100 were taken at, say, 1.8s shutter speed, but pic101 was taken at 2s shutter speed. The problem is that because of that the image sequence does not playback smoothly: at every 100 pictures there is a sudden boost in the brightness. In total, I reduced shutter speed 3 times for the whole sequence. As it was a sunset, I needed to do that because light diminished with the passing of time. During the shoot, after every 100~150 pictures or so, I would reduce my shutter speed. ![]() I am working on a ~500 pictures time-lapse of the sunset. Is there a way to program Lightroom to increase exposure by a certain amount of units at every X number of pictures?
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