---
title: "Upscale video to HDR"
method: POST
path: "/v2/video-to-video-hdr"
tags: ["asyncVideoGeneration"]
---

# Upscale video to HDR

`POST /v2/video-to-video-hdr`

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`.

Billed per second of input video, by input resolution tier. See [Pricing](/pricing).

## Headers

- `Authorization` string, required

## Request body

- VideoToVideoHdrRequest
  - `video_uri` string, required — SDR source video in HTTPS URL or base64 data URI format. See [Input Formats](/input-formats#video-input) 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 `202`

Job submitted successfully

- V2JobCreatedResponse — Response returned when a V2 async job is successfully submitted.
  - `id` string, required — Unique job identifier. Use this to poll for status.
  - `created_at` string, date-time, required — ISO 8601 timestamp of when the job was created.

## Other responses

- `400` — The request is invalid or malformed
- `401` — Authentication failed
- `402` — Insufficient credits
- `422` — Content rejected by safety filters
- `429` — Concurrency or queue limit exceeded
- `500` — An unexpected error occurred
- `503` — Service temporarily unavailable

---

[API](https://skmtc.dev/ltx/apis/api-reference.md) · [All operations](https://skmtc.dev/ltx/apis/api-reference/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/ltx/api-reference/revisions/6ad7c87b252c/schema)