Brawshot – Basic temporal denoise for videos in BRAW format
I wanted to record the aurora last weekend, but I only have a Blackmagic Design video camera which is clearly not made for this purpose. Recording a video of the night sky results in extreme noise to the point that you don't really see anything, so I wrote a tool to significantly reduce noise in such video recordings. Essentially it computes a moving average across video frames which significantly reduces the random sensor noise. This works because aurora changes very slowly, and it's roughly comparable to a long exposure time computed out of a video file where the individual frames have a…
Brawshot – Basic temporal denoise for videos in BRAW format launched on May 18, 2024 with 46 votes, #674 of 4,539 launches that month and more than 90% of that year's launches. The site was still online in September 2026, 2 years on.
In plain words
Brawshot is a noise reduction tool for videos recorded in Blackmagic Design's BRAW format. It reduces sensor noise by computing a moving average across multiple frames, making it particularly useful for low-light footage like aurora recordings where subjects change slowly. The technique mimics long-exposure photography while maintaining full frame rate output. Window sizes can be large without affecting processing speed, making it suitable for heavily noisy footage. The tool is available on GitHub for users working with Blackmagic cameras.
written from the facts on this page · September 2026
From the sources
Temporal noise reduction for videos in BRAW format to get long virtual exposure time - hackyourlife/brawshot
In the maker’s words, at launch
I wanted to record the aurora last weekend, but I only have a Blackmagic Design video camera which is clearly not made for this purpose. Recording a video of the night sky results in extreme noise to the point that you don't really see anything, so I wrote a tool to significantly reduce noise in such video…
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