simple demo

app.py

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+import gradio as gr
+import os
+import json
+import time
+from filelock import FileLock
+from datetime import datetime
+
+# 定义评价标准
+CRITERIA = ["画质清晰度", "物理真实感", "流畅度", "色彩表现", "整体观感"]
+
+# 数据保存路径
+RESULTS_FILE = "results.json"
+LOCK_FILE = "results.json.lock"
+
+def save_result(left_video, right_video, selections):
+    """保存用户的评价结果到文件，使用 FileLock 确保并发安全"""
+    result = {
+        "timestamp": datetime.now().strftime("%Y-%m-%d %H:%M:%S"),
+        "left_video": left_video,
+        "right_video": right_video,
+        "selections": selections
+    }
+    
+    # 确保文件存在
+    if not os.path.exists(RESULTS_FILE):
+        with open(RESULTS_FILE, 'w') as f:
+            json.dump([], f)
+    
+    # 使用 FileLock 保证并发安全
+    lock = FileLock(LOCK_FILE, timeout=60)  # 设置 60 秒超时
+    try:
+        with lock:
+            # 读取现有数据
+            with open(RESULTS_FILE, 'r') as f:
+                data = json.load(f)
+            
+            # 添加新结果
+            data.append(result)
+            
+            # 写入更新后的数据
+            with open(RESULTS_FILE, 'w') as f:
+                json.dump(data, f, indent=2)
+            
+            return True
+    except Exception as e:
+        # 如果发生异常，尝试使用备用方法保存
+        try:
+            backup_file = f"backup_{int(time.time())}.json"
+            with open(backup_file, 'w') as bf:
+                json.dump([result], bf, indent=2)
+            return True
+        except:
+            return False
+
+def submit_evaluation(left_video, right_video, *selections):
+    """处理用户提交的评价"""
+    selections_dict = {}
+    for i, criterion in enumerate(CRITERIA):
+        selections_dict[criterion] = "左侧" if selections[i] == "左侧视频更好" else "右侧"
+    
+    success = save_result(left_video, right_video, selections_dict)
+    
+    if success:
+        return "感谢您的评价！您的反馈已成功保存。"
+    else:
+        return "保存失败，请稍后再试。"
+
+def create_ui():
+    """创建Gradio界面"""
+    with gr.Blocks(css="""
+        .container {max-width: 1200px; margin: 0 auto;}
+        .header {text-align: center; margin-bottom: 20px;}
+        .videos {display: flex; gap: 20px;}
+        .video-container {flex: 1; text-align: center;}
+        .criteria {margin-top: 30px;}
+        .criterion {margin-bottom: 15px; padding: 10px; background: #f7f7f7; border-radius: 8px;}
+        .submit-btn {margin-top: 30px;}
+        footer {margin-top: 50px; text-align: center; font-size: 0.8em; color: #666;}
+    """) as demo:
+        gr.Markdown("# 视频比较评价系统", elem_classes=["header"])
+        gr.Markdown("### 请观看下方两个视频，并根据各项标准选择您认为更好的一个", elem_classes=["header"])
+        
+        with gr.Row(elem_classes=["videos"]):
+            with gr.Column(elem_classes=["video-container"]):
+                gr.Markdown("### 视频 A")
+                left_video = gr.Video(label="左侧视频")
+            
+            with gr.Column(elem_classes=["video-container"]):
+                gr.Markdown("### 视频 B")
+                right_video = gr.Video(label="右侧视频")
+        
+        selections = []
+        with gr.Group(elem_classes=["criteria"]):
+            gr.Markdown("## 评价标准")
+            for criterion in CRITERIA:
+                with gr.Row(elem_classes=["criterion"]):
+                    gr.Markdown(f"### {criterion}")
+                    selection = gr.Radio(
+                        ["左侧视频更好", "右侧视频更好"], 
+                        label="您的选择",
+                        info="请选择您认为在此标准下表现更好的视频"
+                    )
+                    selections.append(selection)
+        
+        submit_btn = gr.Button("提交评价", variant="primary", elem_classes=["submit-btn"])
+        result = gr.Markdown()
+        
+        submit_btn.click(
+            fn=submit_evaluation,
+            inputs=[left_video, right_video] + selections,
+            outputs=result
+        )
+        
+        gr.Markdown(
+            "---\n"
+            "© 2023 视频比较评价系统 | 感谢您的参与",
+            elem_classes=["footer"]
+        )
+    
+    return demo
+
+if __name__ == "__main__":
+    demo = create_ui()
+    demo.launch()

requirements.txt

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+gradio>=3.50.2
+filelock>=3.0.12
+numpy>=1.20.0
+pillow>=8.0.0
+pydub>=0.25.1
+ffmpeg-python>=0.2.0
+matplotlib>=3.4.0
+pandas>=1.3.0