diff --git a/music-lab/app/pipeline/orchestrator.py b/music-lab/app/pipeline/orchestrator.py
index cebe7e2..a842f2c 100644
--- a/music-lab/app/pipeline/orchestrator.py
+++ b/music-lab/app/pipeline/orchestrator.py
@@ -104,7 +104,7 @@ async def _run_cover(p, track, feedback):
 async def _run_video(p, track):
     setup = db.get_youtube_setup()
     vd = setup["visual_defaults"]
-    audio_path = _local_path(track.get("audio_url", ""))
+    audio_path = track.get("file_path") or _local_path(track.get("audio_url", ""))
     cover_path = _local_path(p["cover_url"])
     out = video.generate(
         pipeline_id=p["id"], audio_path=audio_path, cover_path=cover_path,
@@ -162,14 +162,17 @@ async def _run_publish(p, track):
 
 
 def _local_path(media_url: str) -> str:
-    """ /media/videos/123/cover.jpg → /app/data/videos/123/cover.jpg """
+    """ /media/videos/123/cover.jpg → /app/data/videos/123/cover.jpg
+        /media/music/abc.mp3        → /app/data/abc.mp3 (music mount at /app/data, no subdir)
+    """
     if not media_url:
         return ""
     base_media = os.getenv("VIDEO_MEDIA_BASE", "/media/videos")
     base_data = os.getenv("VIDEO_DATA_DIR", "/app/data/videos")
     if media_url.startswith(base_media):
         return media_url.replace(base_media, base_data, 1)
-    # /media/music/abc.mp3 → /app/data/music/abc.mp3
+    if media_url.startswith("/media/music/"):
+        return media_url.replace("/media/music/", "/app/data/", 1)
     return media_url.replace("/media/", "/app/data/", 1)
 
 
diff --git a/music-lab/app/pipeline/thumb.py b/music-lab/app/pipeline/thumb.py
index ab99146..19865e0 100644
--- a/music-lab/app/pipeline/thumb.py
+++ b/music-lab/app/pipeline/thumb.py
@@ -21,7 +21,7 @@ def generate(*, pipeline_id: int, video_path: str,
            "-ss", "00:00:05", "-vframes", "1", "-q:v", "2", out_path]
     result = subprocess.run(cmd, capture_output=True, text=True, timeout=THUMB_TIMEOUT_S)
     if result.returncode != 0:
-        raise ThumbGenerationError(f"ffmpeg 썸네일 실패: {result.stderr[:300]}")
+        raise ThumbGenerationError(f"ffmpeg 썸네일 실패: {result.stderr[-500:]}")
 
     if overlay_text and track_title:
         _overlay_title(out_path, track_title)
diff --git a/music-lab/app/pipeline/video.py b/music-lab/app/pipeline/video.py
index b62baf9..2e66dff 100644
--- a/music-lab/app/pipeline/video.py
+++ b/music-lab/app/pipeline/video.py
@@ -30,7 +30,7 @@ def generate(*, pipeline_id: int, audio_path: str, cover_path: str,
     logger.info("ffmpeg 실행: %s", " ".join(cmd))
     result = subprocess.run(cmd, capture_output=True, text=True, timeout=VIDEO_TIMEOUT_S)
     if result.returncode != 0:
-        raise VideoGenerationError(f"ffmpeg 실패: {result.stderr[:500]}")
+        raise VideoGenerationError(f"ffmpeg 실패: {result.stderr[-800:]}")
 
     return {
         "url": storage.media_url(pipeline_id, "video.mp4"),