LTX-2 19B LoRA API

Introduction

LTX-2 19B LoRA Text to video generates a clip with its own soundtrack from a prompt, with up to three of your LoRA files loaded. It runs Lightricks' open 19-billion-parameter audio-video model; clips run 5 to 20 seconds at 480p, 720p or 1080p in 16:9 or 9:16.

Choose a mode by starting material

Key features

Official camera LoRAs

Lightricks publishes Dolly In, Dolly Out and Dolly Left LoRAs for this model; each is a few hundred megabytes and loads by link.

Community styles

In our test an anime-style LoRA turned a photoreal prompt into cel animation at scale 0.5.

Three at once

Stack a style and a camera move; in our test the style held with the camera LoRA loaded.

Request parameters

Pricing

Prices are in credits, the same credits you use on the website (1 credit = $0.01). The hold is taken when the task is accepted and settled to the actual charge when it finishes; failed tasks are refunded.

Each task is rounded up to whole credits, so one run at the lowest tier costs 14 credits for a 5-second clip ($0.14).

For an exact number before you run, send the same body to POST /jobs/quote.

Use cases

Directed shots

Reveal, push-in and tracking moves you can rely on across a series.

Styled series

One style LoRA, many prompts, one consistent look.

Prompt guide & pro tips

Mind the 2 GiB limit

Larger files fail; many LTX-2 LoRAs on Hugging Face are 3.4 GB exports, so look for a smaller one.

Name the end of the move

Camera LoRAs work best when the prompt says where the camera ends up.

Compare against no LoRA

Same prompt, same seed, loras empty: if nothing changes, the LoRA was made for another base model.

API quick start

Call the LTX-2 19B LoRA API in three steps

1. Create an API key. Sign in to PopNow and create a key in the API console. Keys start with sk-popnow- and use the same credits as the website.
2. Send the request. POST /jobs/createTask with model lightricks/ltx-2-19b-lora/text-to-video and an input object that follows the parameter table. The response returns a task ID straight away.
3. Get the result. Poll GET /jobs/recordInfo with the task ID, or pass a callBackUrl and we post the result to it. Download the output links when the task succeeds.

# 1. Create the task. Keep the Idempotency-Key if you retry after a network error.
export IDEMPOTENCY_KEY="$(uuidgen)"
curl -X POST https://api.popnow.ai/api/v1/jobs/createTask \
  -H "Authorization: Bearer $POPNOW_API_KEY" \
  -H "Content-Type: application/json" \
  -H "Idempotency-Key: $IDEMPOTENCY_KEY" \
  -d '{
  "model": "lightricks/ltx-2-19b-lora/text-to-video",
  "input": {
    "prompt": "A slow aerial shot drifting over a misty pine forest at sunrise",
    "aspect_ratio": "16:9",
    "resolution": "720p",
    "duration_seconds": 5
  }
}'

# 2. Copy data.taskId from the response, then poll until state is succeeded, failed, canceled or expired.
TASK_ID="TASK_ID_FROM_RESPONSE"
curl "https://api.popnow.ai/api/v1/jobs/recordInfo?taskId=$TASK_ID" \
  -H "Authorization: Bearer $POPNOW_API_KEY"

Replace the prompt and any links with your own. The API tab has the response, polling and callback reference.

LTX-2 19B LoRA API questions

All LTX models

LTX-2.3 LoRA runs the newer 22-billion-parameter model; pick the one your LoRA was trained for.

• LTX 2.5 APILong 20-second takes up to 4K with a soundtrackFrom 68 credits for a 5-second clip
• LTX-2.3 LoRA APILTX-2.3 clips with stereo sound and your own LoRAsFrom 18 credits for a 5-second clip
• LTX-2 19B API20-second clips with voices, music and effectsFrom 11 credits for a 5-second clip
• LTX-2 19B LoRA APILTX-2 clips with sound and your own LoRA stylesFrom 14 credits for a 5-second clip

Other video APIs

• MiniMax H3 APIExpressive clips with audio, up to 2KFrom 28 credits for a 5-second clip
• MiniMax H3 Singularity LoRA APICommunity-tuned H3 video that loads your own LoRAsFrom 45 credits for a 5-second clip
• MiniMax H3 LoRA APIMiniMax H3 video with sound and up to three of your LoRAsFrom 38 credits for a 5-second clip
• Wan 2.2 LoRA APIWan 2.2 video with your LoRAs on either expert passFrom 18 credits for a 5-second clip
• Wan 2.2 5B LoRA APILight 720p Wan 2.2 clips that load your own LoRAsFrom 18 credits per run
• Wan 2.1 LoRA APIWan 2.1 video and edits with your own LoRAs, camera moves includedFrom 36 credits per run

More about LTX-2 19B LoRA

Try it

LTX-2 19B LoRA AI Video Generator onlineCreate videos with LTX-2 19B LoRA in PopNow

Docs

LTX-2 19B LoRA model ID and input schema in the API docsPopNow API quickstart: your first request in five minutesImage to video guide for the PopNow APIWebhooks: get LTX-2 19B LoRA results without polling