The scripts and settings used to generate this 4k fisheye fulldome video are shared at https://github.com/hn-88/openspace-scripts
The following script was used,
https://github.com/hn-88/openspace-scripts/blob/main/user/recordings/zoom-out-psn-to-galaxy4.osrectxt
where the motion is actually backwards, zooming out, in order to give a more controlled zoom travel.
ffmpeg and blender were used to render the screenshot image sequences into video, forward and backwards. Blender could be used to fine-tune the video by speeding up parts of the video without much action and so on.
ffmpeg to reverse a frame sequence - https://stackoverflow.com/questions/40475480/ffmpeg-convert-image-sequence-to-video-with-reversed-order
The zoom-in (reversed frames) have been uploaded and made available at archive.org using the x265-lossless codec under a Public Domain licence.
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