Upscale video to HDR | LTX Documentation

Convert an SDR video into HDR. On completion, the result contains exr_frames_url — a ZIP of per-frame EXR images suitable for color grading or HDR rendering pipelines.

Responds immediately with the job id and created_at timestamp. Poll GET /v2/video-to-video-hdr/{id} until the status is completed.

Authentication

AuthorizationBearer

API key authentication

Request

This endpoint expects an object.

video_uristringRequired

SDR source video in HTTPS URL or base64 data URI format. See Input Formats for supported formats and codecs.

Max frames (and max duration at 24 fps) depend on the input resolution tier — inputs are snapped to the smallest tier that fits by pixel count:

Input resolution tier	Max frames	Max duration (at 24 fps)
Up to 1080p (≤ 1920×1080)	181	~7 seconds
Up to 1440p (≤ 2560×1440)	101	~4 seconds
Up to 4K (≤ 3840×2160)	41	~2 seconds

The output video preserves the input video’s resolution.

Response

Job submitted successfully

idstring

Unique job identifier. Use this to poll for status.

created_atdatetime

ISO 8601 timestamp of when the job was created.

Errors

400

Bad Request Error

401

Unauthorized Error

402

Payment Required Error

422

Unprocessable Entity Error

429

Too Many Requests Error

500

Internal Server Error

503

Service Unavailable Error

1	curl -X POST https://api.ltx.video/v2/video-to-video-hdr \
2	-H "Authorization: Bearer YOUR_API_KEY" \
3	-H "Content-Type: application/json" \
4	-d '{"video_uri": "https://example.com/input.mp4"}'
5	# See /async-jobs for the polling pattern.
6	# When completed, result contains: { exr_frames_url }