Principle:Zai org CogVideo Caption Output
| Attribute | Value |
|---|---|
| Principle Name | Caption Output |
| Workflow | Video Captioning |
| Step | 5 of 5 |
| Type | Data Output |
| Repository | zai-org/CogVideo |
| Paper | CogVLM2 |
| Last Updated | 2026-02-10 00:00 GMT |
Overview
Technique for saving generated video captions to files for use as training data. Caption output writes the generated text descriptions to files compatible with the CogVideoX fine-tuning dataset format.
Description
Caption output writes the generated text descriptions to files that can be consumed by downstream training pipelines. The captions are saved as plain text files that can be referenced by the dataset preparation step's caption_column parameter.
The output format is flexible, supporting:
- Per-video caption files: Each video gets a corresponding
.txtfile containing its caption. - Aggregated prompts file: All captions are appended to a single
prompts.txtfile, one caption per line. - CSV/JSON format: Captions can be saved in structured formats for integration with dataset loading scripts.
The key requirement is that the output format matches the expectations of the CogVideoX fine-tuning pipeline's dataset configuration.
Usage
Use Caption Output after generating captions to create the prompts.txt file (or equivalent) needed by the fine-tuning dataset. The output format should match the caption_column parameter of the training dataset configuration.
Theoretical Basis
The caption output step bridges the gap between the captioning pipeline and the fine-tuning pipeline. The design follows the data pipeline pattern where each stage produces output compatible with the next stage's input expectations:
Video files -> Frame extraction -> Caption generation -> Caption output -> Fine-tuning dataset
Plain text format is preferred for captions because:
- Simplicity: No parsing library required for reading.
- Compatibility: Works with standard file I/O in any programming language.
- Line-oriented: One caption per line enables simple line-by-line reading and distributed processing.
Related Pages
- Implementation:Zai_org_CogVideo_Caption_File_Output -- Implementation of caption file output
- Zai_org_CogVideo_Caption_Generation -- Previous step: generating the caption text
- Zai_org_CogVideo_Captioning_Environment_Setup -- Environment setup for the captioning pipeline