ponyflash 0.2.1

PonyFlash Python SDK — Image, Video & Audio generation

PonyFlash Python SDK

AI-native image, video, speech, and music generation SDK.

Zero friction file handling — pass open() file objects, Path objects, URLs, bytes, or file_id strings. The SDK auto-uploads via presigned URLs and cleans up temp files when the task completes.

Installation

pip install ponyflash

如果你需要本地时间线合成能力：

pip install ponyflash[editor]

Quick Start

from ponyflash import PonyFlash

client = PonyFlash(api_key="rk_xxx")

# Text-to-image
gen = client.images.generate(
    model="nano-banana-pro",
    prompt="A sunset over mountains",
    resolution="2K",
)
print(gen.url)                         # first output URL
print(f"Credits used: {gen.credits}")  # credits consumed

本地视频编辑 ponyflash.editor

ponyflash.editor 是正式的一等能力，运行在本地 FFmpeg 上，不依赖云端生成接口，也不需要 API Key。

from ponyflash.editor import Timeline, Track, Clip, VideoAsset, Transition

track = Track()
track.add_clip(0, Clip(asset=VideoAsset("scene1.mp4"), duration=3.0))
track.add_clip(
    2.0,
    Clip(asset=VideoAsset("scene2.mp4"), duration=3.0),
    transition=Transition.DISSOLVE,
    transition_duration=1.0,
)

timeline = Timeline(aspect_ratio="16:9")
timeline.add_track(track)
timeline.render("output.mp4", resolution="1080p")

规则摘要：

• Track.add_clip(start, clip) 使用绝对时间轴语义。
• 主视频轨允许 gap，会按黑帧/静音保留时间线。
• 主视频轨的 xfade 必须使用合法重叠窗口；例如前一个片段 3 秒、转场 1 秒，则下一个片段应从 2.0 秒开始，而不是 3.0 秒。
• 显式 "WxH" 分辨率必须是偶数宽高。

Video Generation

from pathlib import Path

# Text-to-video
gen = client.video.generate(
    model="video-gen-1",
    prompt="A timelapse of a city at night",
    size="1920x1080",
    duration=8,
)
print(gen.url)

> `size` 与 `resolution` / `aspect_ratio` 互斥。使用 `size` 时，不要再同时传 `resolution` 或 `aspect_ratio`。

# First-frame to video (local file)
with open("my_photo.jpg", "rb") as f:
    gen = client.video.generate(
        model="video-gen-1",
        first_frame=f,
        prompt="Camera slowly zooms in",
    )

# First-frame to video (public URL)
gen = client.video.generate(
    model="video-gen-1",
    first_frame="https://example.com/photo.jpg",
    prompt="Camera slowly zooms in",
)

# OmniHuman: portrait + audio → talking video
with open("portrait.jpg", "rb") as img, open("speech.wav", "rb") as audio:
    gen = client.video.generate(
        model="omnihuman-1.5",
        first_frame=img,
        audio=audio,
        prompt="Natural speaking with subtle hand gestures",
        size="1280x720",
    )

# OmniHuman with fast mode and seed
with open("portrait.jpg", "rb") as img, open("speech.wav", "rb") as audio:
    gen = client.video.generate(
        model="omnihuman-1.5",
        first_frame=img,
        audio=audio,
        seed=42,
        fast_mode=True,
    )

# Motion Transfer: person image + dance video → person performs the dance
with open("my_avatar.jpg", "rb") as img, open("dance_clip.mp4", "rb") as vid:
    gen = client.video.generate(
        model="motion-transfer-1",
        first_frame=img,
        motion_video=vid,
        size="1280x720",
    )

Image Generation

# Text-to-image
gen = client.images.generate(
    model="nano-banana-pro",
    prompt="A sunset",
    resolution="2K",
    aspect_ratio="16:9",
)

> `size` 与 `resolution` / `aspect_ratio` 互斥。推荐优先使用 `resolution + aspect_ratio`，或直接使用一个明确的 `size`。

# Image-to-image (local file)
with open("source.png", "rb") as f:
    gen = client.images.generate(
        model="nano-banana-pro",
        prompt="Make it look like a watercolor painting",
        reference_images=[f],
    )

# Image-to-image (public URL)
gen = client.images.generate(
    model="nano-banana-pro",
    prompt="Make it look like a watercolor painting",
    reference_images=["https://example.com/source.png"],
)

# Inpainting with mask
with open("photo.jpg", "rb") as img, open("mask.png", "rb") as mask:
    gen = client.images.generate(
        model="nano-banana-pro",
        prompt="Replace the sky with aurora borealis",
        reference_images=[img],
        mask=mask,
    )

Speech Synthesis (TTS)

gen = client.speech.generate(
    model="speech-2.8-hd",
    input="Welcome to PonyFlash, this is a speech synthesis demo.",
    voice="English_Graceful_Lady",
    language="zh-CN",
)
print(gen.url)

# With emotion and pitch control
gen = client.speech.generate(
    model="speech-2.8-hd",
    input="What a beautiful day, I am so happy!",
    voice="English_Insightful_Speaker",
    emotion="happy",
    pitch=2,
    speed=1.1,
)

Music Generation

gen = client.music.generate(
    model="suno-v4.5",
    prompt="A melancholic indie folk ballad with acoustic guitar",
    title="Autumn Leaves",
    duration=180,
)

# Extend from reference audio
with open("my_song_clip.mp3", "rb") as f:
    gen = client.music.generate(
        model="suno-v4.5",
        prompt="Continue with an energetic chorus",
        reference_audio=f,
        continue_at=60.0,
    )

Downloading Results

import httpx

gen = client.images.generate(
    model="nano-banana-pro",
    prompt="A cat wearing sunglasses",
    resolution="2K",
)

# Download the generated image
resp = httpx.get(gen.url)
with open("output.png", "wb") as f:
    f.write(resp.content)

# Multiple outputs
for i, url in enumerate(gen.urls):
    resp = httpx.get(url)
    with open(f"output_{i}.png", "wb") as f:
        f.write(resp.content)

File Input Types

Every file parameter (reference_images, mask, first_frame, audio, motion_video, reference_audio, ...) accepts:

Input	Example	Behavior
Open file object	open("photo.jpg", "rb")	Recommended. Auto-uploaded, auto-cleaned.
Path object	Path("photo.jpg")	Same as above.
bytes	image_bytes	Same as above.
(filename, bytes) tuple	("photo.jpg", data)	Same as above.
URL string	"https://example.com/photo.jpg"	Passed directly to backend. No upload.
file_id string	"file_abc123"	Reuses a previously uploaded file.

generate() auto-cleans temp files after the task completes. submit() does not — use it when you need request_id for manual polling.

普通本地字符串路径（例如 "./photo.jpg"）不支持。本地文件请使用 Path("photo.jpg") 或 open("photo.jpg", "rb")。

Non-blocking: submit() + generations.wait()

task = client.images.submit(model="nano-banana-pro", prompt="A sunset")
print(task.request_id)           # "req_img_001"
print(task.estimated_credits)    # 20

# ... do other work ...

gen = client.generations.wait(task.request_id)
print(gen.url)

Async

from ponyflash import AsyncPonyFlash

client = AsyncPonyFlash(api_key="pf_xxx")

gen = await client.images.generate(model="nano-banana-pro", prompt="A sunset")
print(gen.url)

Configuration

client = PonyFlash(
    api_key="pf_xxx",                           # or PONYFLASH_API_KEY env var
    base_url="https://custom.example.com/v1",    # or PONYFLASH_BASE_URL env var
    max_retries=3,
)

# Polling timeout is per-resource, not per-client:
gen = client.video.generate(
    model="video-gen-1",
    prompt="...",
    timeout=900.0,     # wait up to 15 min for the task to complete (default: 900s)
)

Two kinds of timeout:

• PonyFlash(timeout=...) — per-HTTP-request timeout (default 300s). Only affects individual API calls.
• generate(timeout=...) — polling timeout, how long to wait for the task to finish. Defaults vary by resource: images 120s, video 900s, music 600s, speech 300s.

Advanced: Manual File Management

The file API is available for advanced use cases:

from pathlib import Path

# Upload explicitly (useful when reusing across multiple requests)
file_id = client.files.upload(Path("large_video.mp4"))

# Use the file_id in multiple requests without re-uploading
gen1 = client.video.generate(model="video-gen-1", video=file_id, prompt="Style A")
gen2 = client.video.generate(model="video-gen-1", video=file_id, prompt="Style B")

# Clean up when done
client.files.delete(file_id)

# List and inspect files
files = client.files.list()
info = client.files.get(file_id)
print(info.status, info.expires_at)

Editor Docs

• 编辑器完整示例：见 examples/editor_demo.py
• 如果你在使用 ponyflash-skill，请同步查看对应的 reference/editor.md