app.py

import gradio as gr
from moviepy.editor import VideoFileClip
import os
import tempfile

def compress_video(video):
    if video is None:
        return None
    
    with tempfile.NamedTemporaryFile(delete=False, suffix=".mp4") as temp_input:
        temp_input.write(video.read())
        input_path = temp_input.name

    output_path = input_path.replace(".mp4", "_compressed.mp4")

    try:
        clip = VideoFileClip(input_path)
        clip_resized = clip.resize(height=720)  # giảm độ phân giải
        clip_resized.write_videofile(output_path, bitrate="500k", codec="libx264")

        return output_path
    except Exception as e:
        return f"Lỗi: {e}"

with gr.Blocks() as demo:
    gr.Markdown("## 🎬 Nén video trực tuyến - Giảm dung lượng MP4")
    with gr.Row():
        video_input = gr.Video(label="Tải video lên", format="mp4")
    with gr.Row():
        output = gr.Video(label="Video sau khi nén")
    with gr.Row():
        compress_btn = gr.Button("⚙️ Bắt đầu nén")

    compress_btn.click(fn=compress_video, inputs=video_input, outputs=output)

demo.launch()