From 149a6a3cdd3dcedea8c83831946229af1e2b4574 Mon Sep 17 00:00:00 2001
From: Julien Calixte <julien.calixte@theodo.com>
Date: Mon, 23 Mar 2026 22:42:42 +0100
Subject: [PATCH] debug: log yt-dlp stderr to diagnose extraction failures

---
 app/downloader.py | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/app/downloader.py b/app/downloader.py
index 8b665ff..38a3a0b 100644
--- a/app/downloader.py
+++ b/app/downloader.py
@@ -43,8 +43,6 @@ async def extract_audio(url: str) -> Path:
 
     cmd = [
         "yt-dlp",
-        "--no-warnings",
-        "--quiet",
         "--extract-audio",
         "--audio-format", "mp3",
         "--audio-quality", "128K",
@@ -64,9 +62,14 @@ async def extract_audio(url: str) -> Path:
         stderr=asyncio.subprocess.PIPE,
     )
     _, stderr = await proc.communicate()
+    stderr_text = stderr.decode().strip()
+
+    if stderr_text:
+        import logging
+        logging.getLogger(__name__).warning("yt-dlp stderr: %s", stderr_text)
 
     if proc.returncode != 0:
-        raise RuntimeError(stderr.decode().strip() or "yt-dlp failed with no output")
+        raise RuntimeError(stderr_text or "yt-dlp failed with no output")
 
     if expected.exists():
         return expected