LongSoraGen

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This project provides a full OpenAI-compatible API for generating longer Sora videos by intelligently splitting them into segments and ensuring seamless continuity.

1. Overview

LongSoraGen overcomes Sora's duration limitations by breaking down long video generation requests into multiple connected segments. The system uses AI-powered planning to create coherent narratives across segments and maintains visual continuity by using the last frame of each segment as a reference for the next.

Some of the code and idea is from https://github.com/mshumer/sora-extend, thank you for their work.

✅ Note: This codebase has been tested and verified to work correctly. If you encounter any issues or have suggestions for improvement, please feel free to open an issue or submit a pull request.

2. How It Works

LongSoraGen's main idea follows mshumer's ideas and operates in three main stages:

1. We segment the total video durations into segmentations, and generate prompt for each segmentation.

2. We use the frame from the last video as the frame reference to generate the following frames.

3. Finally, we combine all the video segments.

3. Installation

FFmpeg is needed for video processing, please install it first.

1. Install from pypi:

We have distributed our library to PyPI, check it out:

pip install longsora

2. Install from scratch:

We highly recommend using the uv to install the environments:

uv sync

The environment will be installed in .venv. Activate it using:

source .venv/bin/activate

Set up OpenAI API Key:

export OPENAI_API_KEY='your-api-key-here'

4. Quick Start

Basic Example (Synchronous)

from pathlib import Path
from longsora import OpenAI

output_dir = Path("resources") / "case1"
prompt = "A woman is dancing in a bunch of trees."
model = "sora-2"
seconds_per_segment = 8
num_generations = 3
print(f"the video will be {seconds_per_segment * num_generations} seconds long")

if __name__ == "__main__":
    client = OpenAI()
    client.create_video(
        prompt=prompt,
        model=model,
        seconds_per_segment=seconds_per_segment,
        output_dir=output_dir,
        num_generations=num_generations,
        verbose=True,
        save_segments=True,
        plan_model="gpt-5",
    )

Async Example

import asyncio
from pathlib import Path
from longsora import AsyncOpenAI

output_dir = Path("resources") / "case2"
prompt = "A woman is dancing in a bunch of trees."
seconds_per_segment = 8
model = "sora-2"
num_generations = 2

print(f"the video will be {seconds_per_segment * num_generations} seconds long")

async def main():
    client = AsyncOpenAI()
    await client.create_video(
        prompt=prompt,
        model=model,
        seconds_per_segment=seconds_per_segment,
        output_dir=output_dir,
        num_generations=num_generations,
        verbose=True,
        save_segments=True,
        plan_model="gpt-5",
    )

if __name__ == "__main__":
    asyncio.run(main())

5. License

MIT License

Copyright (c) 2025 LLinkedlist

See LICENSE for details.

6. Citation

If you use this project in your research or applications, please cite:

@misc{longsoragen2025,
  author = {linkedlist771},
  title = {LongSoraGen: Extended Video Generation with OpenAI Sora},
  year = {2025},
  url = {https://github.com/linkedlist771/LongSoraGen}
}