🎬 Video Upscaler 4K
Upscale your videos to Ultra HD quality
💡 Tips:
- 4K (2160p) = 3840x2160 pixels
- Processing time: ~2-5 min per minute of video
- Best Quality uses CRF 15 (near-lossless)
- Max file size: 100MB for free tier
"""
@app.get("/", response_class=HTMLResponse)
async def home():
return HTML_PAGE
@app.post("/upscale")
async def upscale_video(
video: UploadFile = File(...),
resolution: str = Form("2160p"),
quality: str = Form("balanced")
):
try:
# Get target dimensions
if resolution not in RESOLUTIONS:
resolution = "2160p"
width, height = RESOLUTIONS[resolution]
# Quality settings
quality_map = {
"fast": ("23", "fast"),
"balanced": ("18", "medium"),
"best": ("15", "slow")
}
crf, preset = quality_map.get(quality, ("18", "medium"))
# Save uploaded file
upload_id = str(uuid.uuid4())[:8]
input_path = f"/tmp/input_{upload_id}.mp4"
output_path = f"{OUTPUT_DIR}/upscaled_{upload_id}.mp4"
with open(input_path, "wb") as f:
content = await video.read()
f.write(content)
# FFmpeg command for high-quality upscaling
cmd = [
'ffmpeg', '-y',
'-i', input_path,
'-vf', f'scale={width}:{height}:flags=lanczos',
'-c:v', 'libx264',
'-crf', crf,
'-preset', preset,
'-c:a', 'aac', '-b:a', '192k',
'-movflags', '+faststart',
output_path
]
# Run FFmpeg
process = subprocess.run(cmd, capture_output=True, text=True, timeout=3600)
# Clean up input
os.remove(input_path)
if process.returncode == 0 and os.path.exists(output_path):
size_mb = round(os.path.getsize(output_path) / (1024 * 1024), 1)
return {
"success": True,
"resolution": f"{width}x{height}",
"size_mb": size_mb,
"download_url": f"/download/{upload_id}"
}
else:
return {"success": False, "error": "FFmpeg processing failed"}
except subprocess.TimeoutExpired:
return {"success": False, "error": "Processing timeout (>1 hour)"}
except Exception as e:
return {"success": False, "error": str(e)}
@app.get("/download/{upload_id}")
async def download_file(upload_id: str):
file_path = f"{OUTPUT_DIR}/upscaled_{upload_id}.mp4"
if os.path.exists(file_path):
return FileResponse(file_path, filename=f"upscaled_{upload_id}.mp4", media_type="video/mp4")
return {"error": "File not found"}
if __name__ == "__main__":
import uvicorn
uvicorn.run(app, host="0.0.0.0", port=7860)