Fable created novel 4D splat format

7 hours ago

A .splat4d file consists of a header, static section, and GOP chunks for video encoding.
The format provides deterministic, pointwise bounds for splat attributes such as position, color, opacity, rotation, and scale.
It uses error-bounded quantization to ensure integer math and bit-identical reconstruction across decoders.
Designed for HTTP Range requests on static hosts like S3/GCS/R2, it requires no server logic or manifest files.
Payloads are zstd-compressed and store objects without Content-Encoding to avoid double compression.
The format has been tested on sequences from various capture pipelines and outperforms generic lossless baselines.
WebGPU implementation achieves low latency for first view, scrubbing, and playback with efficient decoding and sorting.
Includes command-line tools (e.g., pip install splat4d) for encoding frame series into seekable files.

Hasty Briefsbeta