Lossless compression for DNG video (with DNG Converter and DNGStrip)

Started by cpc, March 28, 2014, 12:31:22 AM

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cpc

Most of you are probably familiar with losslessly compressing DNG raw video with DNG Converter. The compressed DNG sequences work fine in both Resolve and ACR.
I've written a small tool (DNGStrip) to strip these of useless stuff which is unconditionally added by DNGConverter to each frame: a thumbnail and some pointless tags. Mac and Windows versions, free to use. Pretty fast. Download link in this article: Lossless compression for DNG raw video + introducing DNGStrip. The text also gives more context on the whole process.

In short, compressed 16:9 frames will lose 114kb per frame, compressed 2:1 frames will lose 102kb per frame after going  through DNGStrip. Test footage (2:1 1920x960 Canon 5dm3 raw) was reduced from 710gb to 399gb with DNG Converter and then further down to 377gb with DNGStrip. That's 53.1% of the original size for full original image quality and average bitrate only 317 mbps. Not bad, methinks.

Milk and Coffee

This looks amazing! Any discounts for the magic lantern family?
Canon 5D Mark II, Mac/OSX

Walter Schulz