FlashDreams Post-Processing

Use this skill when adding a video post-processor or changing the runner post-processing stream. The reference implementation is integrations/flashvsr/flashvsr/postprocess.py.

Mental Model

A post-processor is usually three classes, not one class inheriting everything:

• VideoPostProcessorConfig: serializable config and CLI surface. It sets _target to the processor factory and declares fields, output_spec(), requires_all_ranks(), and validate_execution().
• VideoPostProcessor: lightweight factory created from config. Its job is start(spec) -> VideoPostProcessorSession.
• VideoPostProcessorSession: mutable per-stream runtime. It owns buffers, caches, lazy model instances, counters, and process() / flush().