fix yt errors

app.py

@@ -3,6 +3,7 @@ import tempfile
 import os
 import yt_dlp
 from moviepy.editor import VideoFileClip
+import socket
 
 from openai import OpenAI
 client = OpenAI()
@@ -15,6 +16,23 @@ client = OpenAI()
 # ---------------------------
 # Helper Functions
 # ---------------------------
+def check_internet_connection(host="8.8.8.8", port=53, timeout=3):
+    """Check if there's an active internet connection."""
+    try:
+        socket.setdefaulttimeout(timeout)
+        socket.socket(socket.AF_INET, socket.SOCK_STREAM).connect((host, port))
+        return True
+    except socket.error:
+        return False
+
+def check_youtube_access():
+    """Check if YouTube is accessible."""
+    try:
+        socket.setdefaulttimeout(5)
+        socket.socket(socket.AF_INET, socket.SOCK_STREAM).connect(("www.youtube.com", 443))
+        return True
+    except socket.error:
+        return False
 def download_video(youtube_url: str, output_path: str) -> str:
     """Download a YouTube video using yt-dlp and save it to the given output path."""
     try:
@@ -25,6 +43,13 @@ def download_video(youtube_url: str, output_path: str) -> str:
             'quiet': False,
             'no_warnings': False,
             'merge_output_format': 'mp4',
+            # Add network-related options to handle connectivity issues
+            'socket_timeout': 30,
+            'retries': 10,
+            'fragment_retries': 10,
+            'extractor_retries': 5,
+            # Use IPv4 to avoid DNS issues
+            'source_address': '0.0.0.0',
         }
         with yt_dlp.YoutubeDL(ydl_opts) as ydl:
             info = ydl.extract_info(youtube_url, download=True)
@@ -32,7 +57,15 @@ def download_video(youtube_url: str, output_path: str) -> str:
             video_path = os.path.join(output_path, f"video.{ext}")
             return video_path
     except Exception as e:
-        st.error(f"Error downloading video: {e}")
+        error_msg = str(e)
+        if "Failed to resolve" in error_msg or "No address associated with hostname" in error_msg:
+            st.error("⚠️ Network Error: Cannot connect to YouTube. Please check:")
+            st.error("1. Your internet connection is active")
+            st.error("2. YouTube is accessible in your network/region")
+            st.error("3. No firewall/proxy is blocking YouTube")
+            st.info("💡 Alternative: Try uploading the video directly if you have it saved locally.")
+        else:
+            st.error(f"Error downloading video: {e}")
         return None
 
 def extract_audio(video_path: str) -> str:
@@ -118,16 +151,23 @@ elif input_mode == "YouTube URL":
     youtube_url = st.sidebar.text_input("Enter YouTube video URL:")
     if youtube_url:
         if st.sidebar.button("Download Video"):
-            with st.spinner("Downloading video from YouTube..."):
-                with tempfile.TemporaryDirectory() as temp_dir:
-                    video_path = download_video(youtube_url, temp_dir)
-                    if video_path:
-                        # Copy to a persistent temp file
-                        with tempfile.NamedTemporaryFile(delete=False, suffix=".mp4") as tmp:
-                            with open(video_path, 'rb') as src:
-                                tmp.write(src.read())
-                            video_path = tmp.name
-                        st.sidebar.success("Video downloaded successfully!")
+            # Check internet connection first
+            if not check_internet_connection():
+                st.sidebar.error("❌ No internet connection detected. Please check your network.")
+            elif not check_youtube_access():
+                st.sidebar.error("❌ Cannot reach YouTube. It may be blocked by your network/firewall.")
+                st.sidebar.info("💡 Try using a VPN or upload the video directly instead.")
+            else:
+                with st.spinner("Downloading video from YouTube..."):
+                    with tempfile.TemporaryDirectory() as temp_dir:
+                        video_path = download_video(youtube_url, temp_dir)
+                        if video_path:
+                            # Copy to a persistent temp file
+                            with tempfile.NamedTemporaryFile(delete=False, suffix=".mp4") as tmp:
+                                with open(video_path, 'rb') as src:
+                                    tmp.write(src.read())
+                                video_path = tmp.name
+                            st.sidebar.success("Video downloaded successfully!")
 
 # ---------------------------
 # Process Video to Extract Audio and Transcript