# Tracker The unique ID of the tracking object is null **URL:** \ **Category:** DeepStream SDK\ **Created:** [July 5, 2021, 7:21am UTC](https://forums.developer.nvidia.com/t/tracker-the-unique-id-of-the-tracking-object-is-null/182770 "2021-07-05T07:21:37Z")\ **Posts on this page:** 11\ **Page:** 1
**Author:** ![1947385633](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@1947385633](https://forums.developer.nvidia.com/u/1947385633)\ **Post date:** [July 5, 2021, 7:21am UTC](https://forums.developer.nvidia.com/t/tracker-the-unique-id-of-the-tracking-object-is-null/182770/1 "2021-07-05T07:21:37Z")
| \*\*• | Hardware Platform (Jetson / GPU)：dGPU\*\* | | --- | --- | | \*\*• | DeepStream Version:5.1\*\* | | \*\*• | JetPack Version (valid for Jetson only)\*\* | | \*\*• | TensorRT Version:7.2.3\*\* | | \*\*• | NVIDIA GPU Driver Version (valid for GPU only):11.1\*\* | | \*\*• | Issue Type( questions, new requirements, bugs):questions\*\* | | \*\*• | deepstream python api Multiplex detection,sample deepstream-test3 run out no vidio of lables？ | ---
**Author:** ![bcao](https://sea2.discourse-cdn.com/nvidia/user_avatar/forums.developer.nvidia.com/bcao/32/14043_2.png) [@bcao](https://forums.developer.nvidia.com/u/bcao)\ **Post date:** [July 6, 2021, 2:31am UTC](https://forums.developer.nvidia.com/t/tracker-the-unique-id-of-the-tracking-object-is-null/182770/3 "2021-07-06T02:31:39Z")
Sorry, I didn’t get, can you explain more details about what’s the issue/question? ---
**Author:** ![1947385633](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@1947385633](https://forums.developer.nvidia.com/u/1947385633)\ **Post date:** [July 6, 2021, 2:41am UTC](https://forums.developer.nvidia.com/t/tracker-the-unique-id-of-the-tracking-object-is-null/182770/4 "2021-07-06T02:41:08Z")
![image](https://global.discourse-cdn.com/nvidia/original/3X/f/8/f85c4f5141bdc0ab2a19b2b93b14d50369fc0c9f.png) I add the tracking function of deepstream-test2 on the basis of deepstream-test3. The video playback has ID, but I extract it as empty in the code. What’s the matter？ ---
**Author:** ![bcao](https://sea2.discourse-cdn.com/nvidia/user_avatar/forums.developer.nvidia.com/bcao/32/14043_2.png) [@bcao](https://forums.developer.nvidia.com/u/bcao)\ **Post date:** [July 6, 2021, 5:10am UTC](https://forums.developer.nvidia.com/t/tracker-the-unique-id-of-the-tracking-object-is-null/182770/5 "2021-07-06T05:10:30Z")
[NvDsObjectMeta — Deepstream Deepstream Version: 6.1.1 documentation](https://docs.nvidia.com/metropolis/deepstream/python-api/PYTHON_API/NvDsMeta/NvDsObjectMeta.html) , you should print the obj\_meta.object\_id ---
**Author:** ![1947385633](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@1947385633](https://forums.developer.nvidia.com/u/1947385633)\ **Post date:** [July 6, 2021, 5:49am UTC](https://forums.developer.nvidia.com/t/tracker-the-unique-id-of-the-tracking-object-is-null/182770/7 "2021-07-06T05:49:56Z")
Yes, I made a mistake just now. After my modification is correct, the result is also wrong. What should I do？ ![image](https://global.discourse-cdn.com/nvidia/original/3X/2/4/24b8d95628832fb89f60b2c99521fc1a082c56dc.png) ![image](https://global.discourse-cdn.com/nvidia/original/3X/0/c/0c10737d032df438086706bfec4ba52124aa343f.png) ---
**Author:** ![1947385633](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@1947385633](https://forums.developer.nvidia.com/u/1947385633)\ **Post date:** [July 6, 2021, 5:54am UTC](https://forums.developer.nvidia.com/t/tracker-the-unique-id-of-the-tracking-object-is-null/182770/8 "2021-07-06T05:54:36Z")
Video display has ID，Do I need any configuration in my code? ![image](https://global.discourse-cdn.com/nvidia/original/3X/e/5/e511d5a5f152d9c5f46ebfc30fb1090303127658.jpeg) ---
**Author:** ![bcao](https://sea2.discourse-cdn.com/nvidia/user_avatar/forums.developer.nvidia.com/bcao/32/14043_2.png) [@bcao](https://forums.developer.nvidia.com/u/bcao)\ **Post date:** [July 12, 2021, 1:03am UTC](https://forums.developer.nvidia.com/t/tracker-the-unique-id-of-the-tracking-object-is-null/182770/9 "2021-07-12T01:03:29Z")
Could you refer [DeepStream SDK FAQ - #11 by bcao](https://forums.developer.nvidia.com/t/deepstream-sdk-faq/80236/11) if you are using nvdcf tracker ---
**Author:** ![1947385633](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@1947385633](https://forums.developer.nvidia.com/u/1947385633)\ **Post date:** [July 12, 2021, 1:16am UTC](https://forums.developer.nvidia.com/t/tracker-the-unique-id-of-the-tracking-object-is-null/182770/10 "2021-07-12T01:16:38Z")
Brother, my language is python. What should I do? ---
**Author:** ![1947385633](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@1947385633](https://forums.developer.nvidia.com/u/1947385633)\ **Post date:** [July 12, 2021, 3:00am UTC](https://forums.developer.nvidia.com/t/tracker-the-unique-id-of-the-tracking-object-is-null/182770/11 "2021-07-12T03:00:10Z")
Brother, please tell me how to stop deep stream-test1 in the background! ---
**Author:** ![bcao](https://sea2.discourse-cdn.com/nvidia/user_avatar/forums.developer.nvidia.com/bcao/32/14043_2.png) [@bcao](https://forums.developer.nvidia.com/u/bcao)\ **Post date:** [July 13, 2021, 2:52pm UTC](https://forums.developer.nvidia.com/t/tracker-the-unique-id-of-the-tracking-object-is-null/182770/12 "2021-07-13T14:52:02Z")
Hey customer, please create new topic for your new quesiton , we would like one topic to track one issue ---
**Author:** ![system](https://sea2.discourse-cdn.com/nvidia/user_avatar/forums.developer.nvidia.com/system/32/68080_2.png) [@system](https://forums.developer.nvidia.com/u/system)\ **Post date:** [September 18, 2021, 3:32am UTC](https://forums.developer.nvidia.com/t/tracker-the-unique-id-of-the-tracking-object-is-null/182770/14 "2021-09-18T03:32:11Z")
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