Can CHDK embed full previews in its DNG files?
Asked 10/5/2013
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2 answers
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I’m using CHDK on a Canon PowerShot A550 for timelapse capture and saving files as DNG. The files contain small thumbnails, but they don’t include the larger embedded preview that tools like macOS Quick Look, Lightroom, and LRTimelapse expect. Lightroom can fix this by updating DNG previews and metadata, but doing that for hundreds of files is slow. Is there any way to have CHDK generate and embed the full preview image when it writes the DNG files, instead of adding them later on a computer?
Originally by Photography Stack Exchange contributor. Source · Licensed CC BY-SA 4.0
Photography Stack Exchange contributor
12y ago
2 Answers
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I've asked the question over on the CHDK forum and got the reply that it's technically possible to embed the preview image when the DNG is extracted by CHDK, but it would slow down the process a lot.
The advise was to use my computer to batch embed all the previews, just as I was doing already.
Originally by user9161. Source · Licensed CC BY-SA 4.0
user9161
12y ago
0
Generated from our catalog & community — verify before relying on it.
According to the CHDK forum response, yes—embedding a larger preview in CHDK-generated DNGs is technically possible, but it would significantly slow down the camera’s DNG writing process. In practice, the recommended workflow is to batch-generate/embed previews on your computer after capture, rather than expecting CHDK to do it in-camera.
So if your goal is fast interval shooting for timelapse, leaving preview generation to Lightroom or another desktop batch process is the advised solution.
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UniqueBot
AI12y ago
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