$ cat node-template.py
Video Lipsync
// Synchronizes lip movements in a video to match a provided audio track using LatentSync 1.6 via a standalone native GPU service. Accepts a source video and an audio file, returns an MP4 with lip-synced output.
Process
Video
template.py
1import os2import sys3import json4import subprocess5import time6import traceback78try:9 import requests10except ImportError:11 subprocess.check_call([sys.executable, "-m", "pip", "install", "requests"])12 import requests1314NATIVE_VIDEO_LIPSYNC_SERVICE_URL = os.getenv(15 "NATIVE_VIDEO_LIPSYNC_SERVICE_URL", "http://native-video-lipsync-service:8107"16)17_EMBLEMA_VERSION = os.getenv("EMBLEMA_VERSION", "dev")18NATIVE_VIDEO_LIPSYNC_SERVICE_IMAGE = os.getenv(19 "NATIVE_VIDEO_LIPSYNC_SERVICE_IMAGE",20 f"emblema/native-video-lipsync-service:{_EMBLEMA_VERSION}",21)22HF_CACHE_HOST_PATH = os.getenv("HF_CACHE_HOST_PATH", "/root/.cache/huggingface")23CONTAINER_NAME = "native-video-lipsync-service"24INPUT_DIR = "/data/input"25OUTPUT_DIR = "/data/output"262728def start_container():29 """Create and start native-video-lipsync-service, removing any stale container first."""30 subprocess.run(31 ["docker", "rm", "-f", CONTAINER_NAME],32 capture_output=True, text=True33 )3435 hf_token = os.getenv("HUGGINGFACE_TOKEN", "")36 print(f"Creating container {CONTAINER_NAME}...", file=sys.stderr)37 run_cmd = [38 "docker", "run", "-d",39 "--name", CONTAINER_NAME,40 "--network", "emblema",41 "--gpus", "all",42 "-e", "PORT=8107",43 "-e", "DEVICE=cuda",44 "-e", f"HF_TOKEN={hf_token}",45 "-v", f"{HF_CACHE_HOST_PATH}:/root/.cache/huggingface",46 NATIVE_VIDEO_LIPSYNC_SERVICE_IMAGE,47 ]48 result = subprocess.run(run_cmd, capture_output=True, text=True)49 if result.returncode != 0:50 print(f"docker run failed (exit {result.returncode}): {result.stderr}", file=sys.stderr)51 raise RuntimeError(f"Failed to start container: {result.stderr}")5253 # Poll health endpoint54 timeout = 24055 interval = 356 elapsed = 057 health_url = f"{NATIVE_VIDEO_LIPSYNC_SERVICE_URL}/health"58 while elapsed < timeout:59 try:60 r = requests.get(health_url, timeout=5)61 if r.status_code == 200:62 print(f"Container healthy (waited {elapsed}s).", file=sys.stderr)63 return64 except requests.ConnectionError:65 pass66 time.sleep(interval)67 elapsed += interval6869 raise RuntimeError(f"Container did not become healthy within {timeout}s")707172def stop_container():73 """Remove the container."""74 try:75 subprocess.run(76 ["docker", "rm", "-f", CONTAINER_NAME],77 capture_output=True, text=True, timeout=3078 )79 print(f"Container {CONTAINER_NAME} removed.", file=sys.stderr)80 except Exception as e:81 print(f"Warning: failed to remove container: {e}", file=sys.stderr)828384def main():85 try:86 input_json = sys.stdin.read()87 execution_input = json.loads(input_json)88 inputs = execution_input.get("inputs", {})8990 video = inputs.get("video", "")91 audio = inputs.get("audio", "")9293 if not video:94 raise ValueError("Video input is required")95 if not audio:96 raise ValueError("Audio input is required")9798 video_path = os.path.join(INPUT_DIR, video)99 if not os.path.exists(video_path):100 raise FileNotFoundError(f"Input video not found: {video_path}")101102 audio_path = os.path.join(INPUT_DIR, audio)103 if not os.path.exists(audio_path):104 raise FileNotFoundError(f"Input audio not found: {audio_path}")105106 os.makedirs(OUTPUT_DIR, exist_ok=True)107108 # Start the container109 start_container()110111 try:112 # Send video and audio to service113 with open(video_path, "rb") as vf, open(audio_path, "rb") as af:114 resp = requests.post(115 f"{NATIVE_VIDEO_LIPSYNC_SERVICE_URL}/lipsync",116 files={117 "video": (os.path.basename(video_path), vf, "video/mp4"),118 "audio": (os.path.basename(audio_path), af, "audio/wav"),119 },120 timeout=900,121 )122123 if resp.status_code != 200:124 try:125 error_detail = resp.json()126 except Exception:127 error_detail = resp.text128 raise RuntimeError(129 f"Lipsync service returned {resp.status_code}: {error_detail}"130 )131132 # Save result133 out_filename = "lipsync_result.mp4"134 out_path = os.path.join(OUTPUT_DIR, out_filename)135 with open(out_path, "wb") as f:136 f.write(resp.content)137138 inference_time = resp.headers.get("X-Inference-Time-Ms", "unknown")139 print(f"Lipsync complete: time={inference_time}ms", file=sys.stderr)140141 output = {142 "video": out_filename,143 }144 print(json.dumps(output, indent=2))145146 finally:147 stop_container()148149 except Exception as e:150 error_output = {151 "error": str(e),152 "errorType": type(e).__name__,153 "traceback": traceback.format_exc(),154 }155 print(json.dumps(error_output), file=sys.stderr)156 sys.exit(1)157158159if __name__ == "__main__":160 main()