diff --git a/transcribe.py b/transcribe.py
index 58520bd..748a80c 100644
--- a/transcribe.py
+++ b/transcribe.py
@@ -21,7 +21,6 @@ from user.models import User
 
 logger = logging.getLogger(__name__)
 
-TARGET_LENGTH = getattr(settings, 'TRANSCRIBE_TARGET_LENGTH', 200)
 
 def prepare_annotations(result, join_sentences=False):
     if join_sentences:
@@ -38,7 +37,7 @@ def prepare_annotations(result, join_sentences=False):
     return annotations
 
 
-def prepare_joint_annotations(result, target_length=TARGET_LENGTH):
+def prepare_joint_annotations(result, target_length=200):
     abbrevs = ["Mr.", "Mrs.", "Dr."]
     ignore = []
     phrase_sounds = []
@@ -150,23 +149,15 @@ def extract_subtitles(item, user, layer, translate, gpu=False, join_sentences=Fa
     if not item.streams():
         logger.error("skip item without media %s: %s", item.public_id)
         return False
-
-    offset = 0
-    annotations = []
-    for stream in item.streams():
-        src = stream.media.path
-        response = run_whisper(src, language, translate, gpu, model)
-        if not response:
-            logger.error("extract failed for  %s", item.public_id)
-            return False
-        for annotation in prepare_annotations(response, join_sentences=join_sentences):
-            if offset:
-                annotation['in'] += offset
-                annotation['out'] += offset
-            annotations.append(annotation)
-        offset += stream.duration
+    src = item.streams()[0].media.path
+    response = run_whisper(src, language, translate, gpu, model)
+    if not response:
+        logger.error("extract failed for  %s", item.public_id)
+        return False
+    annotations = prepare_annotations(response, join_sentences=join_sentences)
     if not annotations:
         return False
+
     if language and language != "en":
         for annotation in annotations:
             annotation["value"] = '<span lang="%s">%s</span>' % (