RUNTIME

Thirty seconds, vertical, whose subject is the renderer itself. The picture is not simply shown; it is shown being computed, row by row, in the order the thread pool actually walks it. 128 BPM, 16 bars, cut to the bar.

File	runtime-1080x1920.mp4
Frame	1080×1920
Rate	60 fps
Length	0:30
Video	H.264 High, yuv420p
Audio	AAC, 48 kHz stereo
Size	140.9 MiB (147752336 bytes)
SHA-256	18e0125de5715bd2ead63eb2e12473206f939af6f1040af50caf4b6d17a5d645

The streams are exactly as the encoder wrote them. Nothing is scaled down or re-encoded for this upload: the only step after the render is a stream copy that puts the index at the front of the file, so playback can start before the download ends, and adds title and source tags.

Rendered offline: every frame is computed on the CPU by the C code in demos/02-runtime and the shared engine/, and the soundtrack by the same program. No images, no audio files, no 3D models, no game engine, no GPU.