Media assets for the datacentre simulation page¶

The page docs/Cnuas_Datacentre_Simulation.md embeds a video from this directory, under exactly this name:

cnuas-datacentre-simulation.mp4

That file is present: 1920x1080, 2:14, 11 MB, H.264 yuv420p with AAC narration and faststart. Every figure and every rectangle in it is drawn from plan.plan_campus() output rather than modelled by hand, so it shows the same geometry the OpenUSD exporter writes to the stage.

.gitignore excludes docs/assets/media/*.mp4, so the video is not committed. Anyone building the site from a fresh clone must obtain it separately or comment the video block out; the poster still renders in its place.

If you replace it, keep the same filename and meet the requirements below.

Requirements for the video file¶

Property	Value
Container	MP4
Video codec	H.264, `yuv420p` pixel format for browser compatibility
Audio codec	AAC, or no audio track
Resolution	1920 by 1080 or higher
Faststart	Required, so the browser can begin playing before the whole file loads

A file produced by most editors needs one pass to move the index to the front:

ffmpeg -i input.mp4 -c copy -movflags +faststart cnuas-datacentre-simulation.mp4

Keep the file under about 50 MB. Git is a poor place for large binaries, so if the finished video is larger than that, host it elsewhere and replace the <video> block on the page with a link or an iframe.

Poster image¶

cnuas-datacentre-simulation-poster.png is a still frame from the film itself (the DH1 rack row, with the two emulated racks lit), which previews better than a plan drawing. Regenerate it from any frame with:

ffmpeg -ss 85.3 -i docs/assets/media/cnuas-datacentre-simulation.mp4 \
  -frames:v 1 -vf scale=1600:-2 \
  docs/assets/media/cnuas-datacentre-simulation-poster.png

To go back to a plan drawing instead:

python3 facility/scripts/render_plan.py --out docs/assets/facility
inkscape --export-type=png \
  --export-filename=docs/assets/media/cnuas-datacentre-simulation-poster.png \
  --export-width=1600 docs/assets/facility/cnuas-campus-plan.svg

Screenshots¶

Isaac Sim screenshots belong in this directory too. Name them cnuas-isaac-<subject>.png, for example cnuas-isaac-campus-aerial.png, and add them to the page in the screenshot section.