update

backend/services/download_service.py

@@ -25,3 +25,34 @@ def download_video(video_id: int, youtube_url: str):
         update_file_path(db, video_id, output_path)
     finally:
         db.close()
+
+
+def stream_video_live(youtube_url: str):
+    result = subprocess.run(
+        [
+            "yt-dlp",
+            "-f", "bestvideo[ext=mp4]+bestaudio[ext=m4a]/best[ext=mp4]/best",
+            "-g", youtube_url,
+        ],
+        capture_output=True, text=True, check=True,
+    )
+    urls = result.stdout.strip().split("\n")
+
+    cmd = ["ffmpeg"]
+    for url in urls:
+        cmd.extend(["-i", url])
+    cmd.extend(["-c", "copy", "-movflags", "frag_keyframe+empty_moov", "-f", "mp4", "pipe:1"])
+
+    process = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.DEVNULL)
+    try:
+        while True:
+            chunk = process.stdout.read(1024 * 1024)
+            if not chunk:
+                break
+            yield chunk
+        process.wait()
+    except GeneratorExit:
+        process.kill()
+    finally:
+        if process.poll() is None:
+            process.kill()