About LTX 2.3 Quality: Video to HDR
LTX 2.3 Quality (Video to HDR) is the HDR preset of Lightricks LTX-2.3 on fal, lifting a standard dynamic range (SDR) input video into high dynamic range using an IC-LoRA HDR workflow guided by a text prompt. The official Lightricks HDR workflow is video-conditioned, so an input video is required.
The model returns an MP4 preview of the HDR result for quick inspection alongside a ZIP archive of 16-bit EXR frames (one per output frame) for downstream compositing and grading. Output is generated at up to roughly 720p (shorter side capped at 704px); larger requested sizes are scaled down while preserving aspect ratio. It exposes a quality preset control and supports up to 481 frames at 1 to 60 FPS.
| Metric | Value |
|---|---|
| Parameter Count | 22 billion |
| Mixture of Experts | No |
*Quantization is specific to the inference provider and the model may be offered with different quantization levels by other providers.
Ready to build with LTX 2.3 Quality: Video to HDR?
Try LTX 2.3 Quality: Video to HDR in the Workbench to prompt it, compare outputs, and iterate on prompts without writing any code. When you're ready to ship, call the same model from our API and build your own apps on top of it.
curl -sSf -X POST https://hub.oxen.ai/api/ai/videos/generate \
-H "Content-Type: application/json" \
-H "Authorization: Bearer $OXEN_API_KEY" \
-d '{
"model": "ltx-2-3-quality-hdr",
"prompt": "A cat sitting on a chair",
"input_video": "https://hub.oxen.ai/api/repos/ox/Oxen-AI-Assets/file/main/videos/waterfall.mp4",
"num_frames": 121,
"generate_audio": true,
"resolution": "auto",
"frames_per_second": 24,
"video_quality": "high",
"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"
}'Request parameters
Every field LTX 2.3 Quality: Video to HDR accepts in the request body. See the API reference for response formats.
https://hub.oxen.ai/api/ai/videos/generate| Field | Type | Required | Default | Description |
|---|---|---|---|---|
prompt | string | Yes | — | The prompt to guide generation. |
input_video | stringuri | Yes | — | SDR input video to lift into HDR. The official Lightricks HDR workflow is video-conditioned. |
num_frames | integer | No | 121 | The number of frames to generate. Range: 9 – 481 |
generate_audio | boolean | No | true | Whether to include audio in the returned video. When disabled, the final MP4 is returned without an audio track. |
resolution | string | No | "auto" | autosquare_hdsquareportrait_4_3portrait_16_9landscape_4_3landscape_16_9 |
frames_per_second | number | No | 24 | Frames per second of the generated video. Range: 1 – 60 |
video_quality | string | No | "high" | The quality preset of the generated video.lowmediumhighmaximum |
negative_prompt | string | No | — | The negative prompt to steer generation away from. |
seed | integernullable | No | — | Random seed for reproducibility. If None, a random seed is chosen. |