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import cv2
import numpy as np
import torch
import io
import asyncio
from basicsr.archs.rrdbnet_arch import RRDBNet
from realesrgan import RealESRGANer
from huggingface_hub import hf_hub_download
from concurrent.futures import ThreadPoolExecutor
class VideoEnhancer:
def __init__(self, model_name="RealESRGAN_x4plus"):
self.device = torch.device('cuda' if torch.cuda.is_available() else 'cpu')
self.model = self.load_model(model_name)
self.executor = ThreadPoolExecutor(max_workers=4)
def load_model(self, model_name):
if model_name == "RealESRGAN_x4plus":
model = RRDBNet(num_in_ch=3, num_out_ch=3, num_feat=64, num_block=23, num_grow_ch=32, scale=4)
model_path = hf_hub_download("schwgHao/RealESRGAN_x4plus", "RealESRGAN_x4plus.pth")
return RealESRGANer(scale=4, model_path=model_path, model=model, tile=0, tile_pad=10, pre_pad=0, half=True)
else:
raise ValueError(f"Unsupported model: {model_name}")
async def enhance_frame(self, frame):
loop = asyncio.get_running_loop()
frame_rgb = cv2.cvtColor(frame, cv2.COLOR_BGR2RGB)
enhanced, _ = await loop.run_in_executor(self.executor, self.model.enhance, frame_rgb)
return cv2.cvtColor(enhanced, cv2.COLOR_RGB2BGR)
async def process_video(self, input_bytes, output_bytes):
cap = cv2.VideoCapture(input_bytes)
width = int(cap.get(cv2.CAP_PROP_FRAME_WIDTH))
height = int(cap.get(cv2.CAP_PROP_FRAME_HEIGHT))
fps = cap.get(cv2.CAP_PROP_FPS)
fourcc = cv2.VideoWriter_fourcc(*'mp4v')
out = cv2.VideoWriter(output_bytes, fourcc, fps, (width * 4, height * 4))
while cap.isOpened():
ret, frame = cap.read()
if not ret:
break
enhanced_frame = await self.enhance_frame(frame)
out.write(enhanced_frame)
cap.release()
out.release()
async def stream_enhanced_video(self, video_file):
video_bytes = await video_file.read()
cap = cv2.VideoCapture(io.BytesIO(video_bytes).getvalue())
async def generate():
while cap.isOpened():
ret, frame = cap.read()
if not ret:
break
enhanced_frame = await self.enhance_frame(frame)
_, buffer = cv2.imencode('.jpg', enhanced_frame)
yield (b'--frame\r\n'
b'Content-Type: image/jpeg\r\n\r\n' + buffer.tobytes() + b'\r\n')
cap.release()
return StreamingResponse(generate(), media_type="multipart/x-mixed-replace; boundary=frame") |