Revert PR #18602 (#19188)

homeassistant/components/camera/mjpeg.py

@@ -59,15 +59,21 @@ async def async_setup_platform(hass, config, async_add_entities,
 
 def extract_image_from_mjpeg(stream):
     """Take in a MJPEG stream object, return the jpg from it."""
-    data = bytes()
-    data_start = b"\xff\xd8"
-    data_end = b"\xff\xd9"
-    for chunk in stream:
-        end_idx = chunk.find(data_end)
-        if end_idx != -1:
-            return data[data.find(data_start):] + chunk[:end_idx + 2]
+    data = b''
 
+    for chunk in stream:
         data += chunk
+        jpg_end = data.find(b'\xff\xd9')
+
+        if jpg_end == -1:
+            continue
+
+        jpg_start = data.find(b'\xff\xd8')
+
+        if jpg_start == -1:
+            continue
+
+        return data[jpg_start:jpg_end + 2]
 
 
 class MjpegCamera(Camera):