Pika-H3-Flex Documentation Outlines Prompt-Writing Guidelines for Multimodal Generation

Overview of Pika-H3-Flex Prompt Guidance

Recent documentation published within the Pika-H3-Flex repository on GitHub details prompt-writing instructions for multimodal video and audio generation. The guidance covers structural formatting, reference handling, and scene composition across text-to-video, frame-to-video, and reference-conditioned workflows.

According to the provided guidance, users can structure requests using specific modalities depending on input assets:

• T2VA (Text-to-Video-and-Audio): Applied for text-only generation using integrated multimodal descriptions, overall soundscapes, and non-diegetic background scores.
• FL2VA (First/Last-Frame-to-Video-and-Audio): Used when specifying opening or closing frames to establish initial and final visual states.
• Ref2VA (Reference-to-Video-and-Audio): Designed for reference-conditioned generation and editing tasks involving subject definitions, retention analyses, and detailed descriptions.

Core Principles and Practical Implications

The documentation emphasizes clear playback ordering, explicit shot numbering, and consistent labeling for assets such as images, videos, and audio tracks. Practical workflows require users to supply their own local media files, as the repository placeholders are not bundled with pre-existing inputs.

• Asset Management: Reference labels maintain sequential counters starting at one for each media type. Videos with soundtracks consume both a video label and an audio label.
• Explicit Edits: Users can specify removals or replacements within the retention analysis markers, outlining retained environments and modified attributes.
• CLI Execution: Commands run from the repository root, requiring proper configuration of model repositories and revisions. The command-line interface does not overwrite existing output files, requiring unique filenames for reruns.

Verification and Limitations

Readers can verify these technical guidelines directly by reviewing the source `prompt-guidance.md` file within the official Pika-Labs GitHub repository. The documentation clarifies that intent markers—such as those for video continuation or audio relationships—describe prompting intentions rather than guaranteeing automated seamless extensions or exact waveform copying.