# Ltx 2.3 Quality > Cross-eyes for high-quality video using LTX-2.3 ## Overview - **Endpoint**: `https://fal.run/fal-ai/ltx-2.3-quality/cross-eyed` - **Model ID**: `fal-ai/ltx-2.3-quality/cross-eyed` - **Category**: video-to-video - **Kind**: inference **Tags**: eyes ## Pricing Your request will cost **$0.0024075** per megapixel of generated video data (width × height × frames), rounded up. For example, if you generate a video that is 121 frames long at 1280 × 720, your total generated video is ≈112 MP, and your request will cost **$0.270.** For more details, see [fal.ai pricing](https://fal.ai/pricing). ## API Information This model can be used via our HTTP API or more conveniently via our client libraries. See the input and output schema below, as well as the usage examples. ### Input Schema The API accepts the following input parameters: - **`video_url`** (`string`, _required_): The URL of the source video to transform. - Examples: "https://v3b.fal.media/files/b/0a8824b1/sdm0KfmenrlywesfzY1Y1_if6euPp1.mp4" - **`prompt`** (`string`, _optional_): Optional short description of the video's content/scene. It is woven into the effect's trained caption to sharpen the result; leave empty to apply the effect with a generic description. Default value: `""` - Default: `""` - **`resolution`** (`ResolutionEnum`, _optional_): Output resolution (short side), preserving the source aspect ratio. The IC-LoRA control path caps the resolution x frames volume, so resolution trades against duration: 720p allows up to ~6s (sharper), 480p up to ~15s (softer but longer). A request above the budget is rejected with a clear error — pick 480p for longer clips. Output duration is num_frames / frames_per_second. Default value: `"720p"` - Default: `"720p"` - Options: `"480p"`, `"720p"` - **`num_frames`** (`integer`, _optional_): The number of output frames. Output duration is num_frames / frames_per_second. The IC-LoRA control budget caps the resolution x frames volume: roughly 6s at 720p or 15s at 480p; a request above it returns a 422 (lower num_frames, or use 480p). Default value: `121` - Default: `121` - Range: `9` to `481` - **`frames_per_second`** (`float`, _optional_): Frames per second of the generated video. Default value: `24` - Default: `24` - Range: `1` to `60` - **`num_inference_steps`** (`integer`, _optional_): Number of inference steps. Defaults to 15 and can be increased up to 30. Default value: `15` - Default: `15` - Range: `8` to `30` - **`guidance_scale`** (`float`, _optional_): Classifier-free guidance scale. The default is tuned for fast, high-quality generation. Default value: `1` - Default: `1` - Range: `1` to `20` - **`generate_audio`** (`boolean`, _optional_): Whether to include audio in the returned video. When disabled, the final MP4 is returned without an audio track. Default value: `true` - Default: `true` - **`negative_prompt`** (`string`, _optional_): The negative prompt to steer generation away from. Default value: `"color distortion, overexposure, static, blurry details, subtitles, style, artwork, painting, frame, still, dim overall tone, worst quality, low quality, JPEG compression artifacts, ugly, mutilated, extra fingers, poorly drawn hands, poorly drawn face, deformed, disfigured, malformed limbs, fused fingers, motionless frame, cluttered background, three legs, crowded background, walking backwards"` - Default: `"color distortion, overexposure, static, blurry details, subtitles, style, artwork, painting, frame, still, dim overall tone, worst quality, low quality, JPEG compression artifacts, ugly, mutilated, extra fingers, poorly drawn hands, poorly drawn face, deformed, disfigured, malformed limbs, fused fingers, motionless frame, cluttered background, three legs, crowded background, walking backwards"` - **`seed`** (`integer`, _optional_): Random seed for reproducibility. If None, a random seed is chosen. - **`enable_safety_checker`** (`boolean`, _optional_): Whether to enable the safety checker. Default value: `true` - Default: `true` - **`video_quality`** (`VideoQualityEnum`, _optional_): The quality preset of the generated video. Default value: `"high"` - Default: `"high"` - Options: `"low"`, `"medium"`, `"high"`, `"maximum"` - **`video_write_mode`** (`VideoWriteModeEnum`, _optional_): The write mode of the generated video. Default value: `"balanced"` - Default: `"balanced"` - Options: `"fast"`, `"balanced"`, `"small"` - **`sync_mode`** (`boolean`, _optional_): If True, the media is returned as a data URI inline in the response. Useful for short-lived requests and tests. - Default: `false` **Required Parameters Example**: ```json { "video_url": "https://v3b.fal.media/files/b/0a8824b1/sdm0KfmenrlywesfzY1Y1_if6euPp1.mp4" } ``` **Full Example**: ```json { "video_url": "https://v3b.fal.media/files/b/0a8824b1/sdm0KfmenrlywesfzY1Y1_if6euPp1.mp4", "resolution": "720p", "num_frames": 121, "frames_per_second": 24, "num_inference_steps": 15, "guidance_scale": 1, "generate_audio": true, "negative_prompt": "color distortion, overexposure, static, blurry details, subtitles, style, artwork, painting, frame, still, dim overall tone, worst quality, low quality, JPEG compression artifacts, ugly, mutilated, extra fingers, poorly drawn hands, poorly drawn face, deformed, disfigured, malformed limbs, fused fingers, motionless frame, cluttered background, three legs, crowded background, walking backwards", "enable_safety_checker": true, "video_quality": "high", "video_write_mode": "balanced" } ``` ### Output Schema The API returns the following output format: - **`video`** (`File`, _required_): The generated video. - **`seed`** (`integer`, _required_): The seed actually used for generation. - **`prompt`** (`string`, _required_): The prompt used for generation (after any expansion). **Example Response**: ```json { "video": { "url": "", "content_type": "image/png", "file_name": "z9RV14K95DvU.png", "file_size": 4404019 }, "prompt": "" } ``` ## Usage Examples ### cURL ```bash curl --request POST \ --url https://fal.run/fal-ai/ltx-2.3-quality/cross-eyed \ --header "Authorization: Key $FAL_KEY" \ --header "Content-Type: application/json" \ --data '{ "video_url": "https://v3b.fal.media/files/b/0a8824b1/sdm0KfmenrlywesfzY1Y1_if6euPp1.mp4" }' ``` ### Python Ensure you have the Python client installed: ```bash pip install fal-client ``` Then use the API client to make requests: ```python import fal_client def on_queue_update(update): if isinstance(update, fal_client.InProgress): for log in update.logs: print(log["message"]) result = fal_client.subscribe( "fal-ai/ltx-2.3-quality/cross-eyed", arguments={ "video_url": "https://v3b.fal.media/files/b/0a8824b1/sdm0KfmenrlywesfzY1Y1_if6euPp1.mp4" }, with_logs=True, on_queue_update=on_queue_update, ) print(result) ``` ### JavaScript Ensure you have the JavaScript client installed: ```bash npm install --save @fal-ai/client ``` Then use the API client to make requests: ```javascript import { fal } from "@fal-ai/client"; const result = await fal.subscribe("fal-ai/ltx-2.3-quality/cross-eyed", { input: { video_url: "https://v3b.fal.media/files/b/0a8824b1/sdm0KfmenrlywesfzY1Y1_if6euPp1.mp4" }, logs: true, onQueueUpdate: (update) => { if (update.status === "IN_PROGRESS") { update.logs.map((log) => log.message).forEach(console.log); } }, }); console.log(result.data); console.log(result.requestId); ``` ## Additional Resources ### Documentation - [Model Playground](https://fal.ai/models/fal-ai/ltx-2.3-quality/cross-eyed) - [API Documentation](https://fal.ai/models/fal-ai/ltx-2.3-quality/cross-eyed/api) - [OpenAPI Schema](https://fal.ai/api/openapi/queue/openapi.json?endpoint_id=fal-ai/ltx-2.3-quality/cross-eyed) ### fal.ai Platform - [Platform Documentation](https://docs.fal.ai) - [Python Client](https://docs.fal.ai/clients/python) - [JavaScript Client](https://docs.fal.ai/clients/javascript)