1 files changed, 99 insertions, 0 deletions
diff --git a/youtube/ytdlp_proxy.py b/youtube/ytdlp_proxy.py
new file mode 100644
index 0000000..4eb7a99
--- /dev/null
+++ b/youtube/ytdlp_proxy.py
@@ -0,0 +1,99 @@
+#!/usr/bin/env python3
+"""
+Proxy for serving videos with specific audio using yt-dlp.
+
+This module provides streaming functionality for unified formats
+with specific audio languages.
+"""
+import logging
+from flask import Response, request, stream_with_context
+import urllib.request
+import urllib.error
+from youtube.ytdlp_service import find_best_unified_format
+
+logger = logging.getLogger(__name__)
+
+
+def stream_video_with_audio(video_id: str, audio_language: str = 'en', max_quality: int = 720):
+    """
+    Stream video with specific audio language.
+    
+    Args:
+        video_id: YouTube video ID
+        audio_language: Preferred audio language (default: 'en')
+        max_quality: Maximum video height (default: 720)
+        
+    Returns:
+        Flask Response with video stream, or 404 if not available
+    """
+    logger.info(f'Stream request: {video_id} | audio={audio_language} | quality={max_quality}p')
+    
+    # Find best unified format
+    best_format = find_best_unified_format(video_id, audio_language, max_quality)
+    
+    if not best_format:
+        logger.info(f'No suitable unified format found, returning 404 to trigger fallback')
+        return Response('No suitable unified format available', status=404)
+    
+    url = best_format.get('url')
+    if not url:
+        logger.error('Format found but no URL available')
+        return Response('Format URL not available', status=500)
+    
+    logger.debug(f'Streaming from: {url[:80]}...')
+    
+    # Stream the video
+    try:
+        req = urllib.request.Request(url)
+        req.add_header('User-Agent', 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36')
+        req.add_header('Accept', '*/*')
+        
+        # Add Range header if client requests it
+        if 'Range' in request.headers:
+            req.add_header('Range', request.headers['Range'])
+            logger.debug(f'Range request: {request.headers["Range"]}')
+        
+        resp = urllib.request.urlopen(req, timeout=60)
+        
+        def generate():
+            """Generator for streaming video chunks."""
+            try:
+                while True:
+                    chunk = resp.read(65536)  # 64KB chunks
+                    if not chunk:
+                        break
+                    yield chunk
+            except Exception as e:
+                logger.error(f'Stream error: {e}')
+                raise
+        
+        # Build response headers
+        response_headers = {
+            'Content-Type': resp.headers.get('Content-Type', 'video/mp4'),
+            'Access-Control-Allow-Origin': '*',
+        }
+        
+        # Copy important headers
+        for header in ['Content-Length', 'Content-Range', 'Accept-Ranges']:
+            if header in resp.headers:
+                response_headers[header] = resp.headers[header]
+        
+        status_code = resp.getcode()
+        logger.info(f'Streaming started: {status_code}')
+        
+        return Response(
+            stream_with_context(generate()),
+            status=status_code,
+            headers=response_headers,
+            direct_passthrough=True
+        )
+        
+    except urllib.error.HTTPError as e:
+        logger.error(f'HTTP error streaming: {e.code} {e.reason}')
+        return Response(f'Error: {e.code} {e.reason}', status=e.code)
+    except urllib.error.URLError as e:
+        logger.error(f'URL error streaming: {e.reason}')
+        return Response(f'Network error: {e.reason}', status=502)
+    except Exception as e:
+        logger.error(f'Streaming error: {e}', exc_info=True)
+        return Response(f'Error: {e}', status=500)