Kwaivgi Kling Video To Audio

Kwaivgi Kling Video To Audio

Playground

Kling Video-to-Audio auto-generates or extracts matching sound effects and audio tracks from video using KlingAI’s audio generation model. Ready-to-use REST API, best performance, no coldstarts, affordable pricing.

Features

Kling Video-to-Audio adds a complete soundtrack to a silent video using two short prompts: one for sound effects (SFX) and one for background music (BGM). It generates synchronized foley, ambience, and score cues that match on-screen action. Great for trailers, shorts, product shots, and mood pieces.

Highlights

• Prompt-based SFX and BGM that follow scene energy and timing
• Optional ASMR mode for hyper-detailed, close-mic textures
• Works with cinematic, documentary, gameplay, and product footage
• Fast iteration: tweak prompts, re-render, and compare

Parameters

• video (required) URL or upload of the silent clip to be sonified.

• sound_effect_prompt Describe on-screen events and textures to hear. Example: “Thunderstorm, heavy rain, distant thunder rolls, glass rattling, wind gusts, ocean waves slamming rocks.”

• bgm_prompt Describe musical mood, instrumentation, and pacing. Example: “Brooding orchestral score, low strings, sparse piano hits, slow build with sub-bass swells.”

• asmr_mode (checkbox) Enhances micro-details and proximity effect for immersive listening (ear-tingles, crisp foley).

How to Use

1. Upload or paste the video URL.
2. Write a concise sound_effect_prompt for foley/ambience.
3. Add a bgm_prompt for the musical bed.
4. Toggle asmr_mode if you want ultra-detailed textures.
5. Click Run and download the generated audio track aligned to your clip.

Prompting Tips

• Be concrete: call out specific events, materials, and distances

“Leather jacket rustle, footsteps on wet concrete, elevator ding, neon hum.”

• For BGM, specify tempo/structure.
• Keep SFX and BGM prompts stylistically consistent to avoid clashes.
• If dialogue is needed, add it in post—this model focuses on SFX and score.

Output

• An audio track designed to sync with the input video’s duration.
• Format and delivery follow platform defaults (download URL in the response).

Pricing

• Per-job pricing is $0.035

Notes

• Start with clean, final-cut footage; large edits after sound design will desync cues.
• Loudness is unmastered by design—normalize or master in your editor to your target LUFS.
• Ensure you have rights to the video content you upload and follow platform policies for generated audio.

Authentication

For authentication details, please refer to the Authentication Guide.

API Endpoints

Submit Task & Query Result

set -euo pipefail

export WAVESPEED_API_KEY="your-api-key"

REQUEST_BODY=$(cat <<'JSON'
{
  "asmr_mode": false
}
JSON
)

# 1. Submit the prediction.
SUBMIT_RESPONSE=$(curl --silent --show-error --fail-with-body \
  -X POST "https://api.wavespeed.ai/api/v3/kwaivgi/kling-video-to-audio" \
  -H "Authorization: Bearer ${WAVESPEED_API_KEY}" \
  -H "Content-Type: application/json" \
  -d "${REQUEST_BODY}")

TASK=$(printf '%s' "${SUBMIT_RESPONSE}" | jq 'if type == "object" and has("data") then .data else . end')
PREDICTION_ID=$(printf '%s' "${TASK}" | jq -r '.id // empty')
if [ -z "${PREDICTION_ID}" ]; then
  printf 'Submission response did not contain a prediction id
' >&2
  exit 1
fi
RESULT_URL=$(printf '%s' "${TASK}" | jq -r '.urls.get // empty')
if [ -z "${RESULT_URL}" ]; then RESULT_URL="https://api.wavespeed.ai/api/v3/predictions/${PREDICTION_ID}/result"; fi

# 2. Poll until the prediction finishes.
while true; do
  RESPONSE=$(curl --silent --show-error --fail-with-body \
    "${RESULT_URL}" \
    -H "Authorization: Bearer ${WAVESPEED_API_KEY}")
  RESULT=$(printf '%s' "${RESPONSE}" | jq 'if type == "object" and has("data") then .data else . end')
  STATUS=$(printf '%s' "${RESULT}" | jq -r '.status // empty')

  case "${STATUS}" in
    completed) printf '%s\n' "${RESULT}" | jq '.outputs'; break ;;
    failed|cancelled|timeout) printf '%s\n' "${RESULT}" | jq . >&2; exit 1 ;;
    created|processing) sleep 2 ;;
    *) printf 'Unexpected status: %s
' "${STATUS}" >&2; exit 1 ;;
  esac
done

Parameters

Task Submission Parameters

Request Parameters

Response Parameters

Result Request Parameters

Result Response Parameters