diff --git a/biz/ffmpeg.py b/biz/ffmpeg.py
index 340211e..8b66413 100644
--- a/biz/ffmpeg.py
+++ b/biz/ffmpeg.py
@@ -16,10 +16,11 @@ logger = logging.getLogger('biz/ffmpeg')
 
 def parse_ffmpeg_task(task_info, template_info):
     tracer = get_tracer(__name__)
-    with tracer.start_as_current_span("parse_ffmpeg_task"):
+    with tracer.start_as_current_span("parse_ffmpeg_task") as span:
         tasks = []
         # 中间片段
         task_params_str = task_info.get("taskParams", "{}")
+        span.set_attribute("task_params", task_params_str)
         task_params = json.loads(task_params_str)
         for part in template_info.get("video_parts"):
             source = parse_video(part.get('source'), task_params, template_info)
@@ -87,8 +88,8 @@ def parse_video(source, task_params, template_info):
                 logger.debug("no video found for placeholder: " + placeholder_id)
                 return None
             else:
-                # TODO: Random Pick / Policy Pick
-                new_sources = new_sources[0].get("url")
+                _pick_source = new_sources.pop(0)
+                new_sources = _pick_source.get("url")
         if new_sources.startswith("http"):
             _, source_name = os.path.split(new_sources)
             oss.download_from_oss(new_sources, source_name)
diff --git a/biz/task.py b/biz/task.py
index 0cacded..d7157bc 100644
--- a/biz/task.py
+++ b/biz/task.py
@@ -13,6 +13,8 @@ def start_task(task_info):
     with tracer.start_as_current_span("start_task") as span:
         task_info = api.normalize_task(task_info)
         span.set_attribute("task", json.dumps(task_info))
+        span.set_attribute("scenicId", task_info.get("scenicId", "?"))
+        span.set_attribute("templateId", task_info.get("templateId"))
         template_info = get_template_def(task_info.get("templateId"))
         api.report_task_start(task_info)
         ffmpeg_task = parse_ffmpeg_task(task_info, template_info)