GET
/v1/schemas/fal/video/fal-ai/ltx-2-19b/extend-video/lora
Accept:
| field | recorded source |
|---|---|
| schema | Source linked above.Source tracedeedd4fed5a56ddde0a209c36fc7d8fcee860dc2f0bc8a799679590ed03fd80b{
"fetchedAt": 1783331098,
"extractorVersion": "1",
"verifiedAt": null
} |
Request body
28 properties · 3 required · 2 $defs| property | type | description | constraints |
|---|---|---|---|
| loras* | LoRAInput[] | The LoRAs to use for the generation. | |
| prompt* | string | The prompt to generate the video from. | |
| video_url* | string | The URL of the video to extend. | |
| num_inference_steps | integer | The number of inference steps to use. | 8 ≤ n ≤ 50 · default: 40 |
| enable_prompt_expansion | boolean | Whether to enable prompt expansion. | default: true |
| enable_safety_checker | boolean | Whether to enable the safety checker. | default: true |
| end_image_strength | number | The strength of the end image to use for the video generation. | 0 ≤ n ≤ 1 · default: 1 |
| camera_lora_scale | number | The scale of the camera LoRA to use. This allows you to control the camera movement of the generated video more accurately than just prompting the model to move the camera. | 0 ≤ n ≤ 1 · default: 1 |
| end_image_url | string | The URL of the image to use as the end of the extended video. | nullable |
| guidance_scale | number | The guidance scale to use. | 1 ≤ n ≤ 10 · default: 3 |
| video_output_type | enum | The output type of the generated video. | X264 (.mp4) | VP9 (.webm) | PRORES4444 (.mov) | GIF (.gif) · default: "X264 (.mp4)" |
| video_strength | number | Video conditioning strength. Lower values represent more freedom given to the model to change the video content. | 0 ≤ n ≤ 1 · default: 1 |
| generate_audio | boolean | Whether to generate audio for the video. | default: true |
| acceleration | enum | The acceleration level to use. | none | regular | high | full · default: "regular" |
| video_quality | enum | The quality of the generated video. | low | medium | high | maximum · default: "high" |
| fps | number | The frames per second of the generated video. | 1 ≤ n ≤ 60 · default: 25 |
| seed | integer | The seed for the random number generator. | nullable |
| video_size | ImageSize | enum | The size of the generated video. | default: "auto" |
| negative_prompt | string | The negative prompt to generate the video from. | default: "blurry, out of focus, overexpos… |
| extend_direction | enum | Direction to extend the video. 'forward' extends from the end of the video, 'backward' extends from the beginning. | forward | backward · default: "forward" |
| num_context_frames | integer | The number of frames to use as context for the extension. | 0 ≤ n ≤ 121 · default: 25 |
| camera_lora | enum | The camera LoRA to use. This allows you to control the camera movement of the generated video more accurately than just prompting the model to move the camera. | dolly_in | dolly_out | dolly_left | dolly_right | jib_up | jib_down · +2 more · default: "none" |
| use_multiscale | boolean | Whether to use multi-scale generation. If True, the model will generate the video at a smaller scale first, then use the smaller video to guide the generation of a video at or above your requested size. This results in better coherence and details. | default: true |
| match_input_fps | boolean | When true, match the output FPS to the input video's FPS instead of using the default target FPS. | default: true |
| video_write_mode | enum | The write mode of the generated video. | fast | balanced | small · default: "balanced" |
| sync_mode | boolean | If `True`, the media will be returned as a data URI and the output data won't be available in the request history. | default: false |
| num_frames | integer | The number of frames to generate. | 9 ≤ n ≤ 481 · default: 121 |
| audio_strength | number | Audio conditioning strength. Lower values represent more freedom given to the model to change the audio content. | 0 ≤ n ≤ 1 · default: 1 |
Types
2 $defsImageSizeobject
| height | integer | The height of the generated image. | 0 < n ≤ 14142 · default: 512 |
| width | integer | The width of the generated image. | 0 < n ≤ 14142 · default: 512 |
LoRAInputobject
LoRA weight configuration.
| path* | string | URL, HuggingFace repo ID (owner/repo) to lora weights. | |
| weight_name | string | Name of the LoRA weight. Only used if `path` is a HuggingFace repository, and is only required when the repository contains multiple LoRA weights. | nullable |
| scale | number | Scale factor for LoRA application (0.0 to 4.0). | 0 ≤ n ≤ 4 · default: 1 |
Validate a payload
before you spend tokensshell
$ curl -X POST https://modelschemas.com/v1/validate \
-d '{"provider":"fal","endpointId":"fal-ai/ltx-2-19b/extend-video/lora","payload":{…}}'
→ {"valid": false, "errors": [{"path": "#", "keyword": "required", …}]}