# Decode multi-stream with GTX 1080 using DeepStream SDK

**URL:** <https://forums.developer.nvidia.com/t/decode-multi-stream-with-gtx-1080-using-deepstream-sdk/119340>\
**Category:** DeepStream SDK\
**Created:** [April 10, 2020, 4:46pm UTC](https://forums.developer.nvidia.com/t/decode-multi-stream-with-gtx-1080-using-deepstream-sdk/119340 "2020-04-10T16:46:41Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![LoveNvidia](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@LoveNvidia](https://forums.developer.nvidia.com/u/LoveNvidia)\
**Post date:** [April 10, 2020, 4:46pm UTC](https://forums.developer.nvidia.com/t/decode-multi-stream-with-gtx-1080-using-deepstream-sdk/119340/1 "2020-04-10T16:46:42Z")

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Hi guys,  
I have some question about multi-streaming decode with dGPU.

I want to run DeepStream SDK 4.0 on PC and to doing multi-stream decode :  
I follow [medium post](https://medium.com/@fanzongshaoxing/use-nvidia-deepstream-to-accelerate-h-264-video-stream-decoding-8f0fec764778) about Use NVIDIA DeepStream to Accelerate H.264 Video Stream Decoding, and my system has such specifications:

**GPU : GTX 1080**  
**OS : ubuntu 16.04**  
**TensorRT : 5.x**  
**Cuda : 10.1**  
, …

when I run sudo apt-get install ./deepstream-4.0\_4.0-1\_amd64.deb, I get this error:

> Reading package lists… Done  
> Building dependency tree  
> Reading state information… Done  
> Note, selecting ‘deepstream-4.0’ instead of ‘./deepstream-4.0\_4.0-1\_amd64.deb’  
> Some packages could not be installed. This may mean that you have  
> requested an impossible situation or if you are using the unstable  
> distribution that some required packages have not yet been created  
> or been moved out of Incoming.  
> The following information may help to resolve the situation:
> 
> The following packages have unmet dependencies:  
> deepstream-4.0 : Depends: libcairo2 (\>= 1.15.10) but 1.14.6-1 is to be installed  
> Depends: libglib2.0-0 (\>= 2.56.4) but 2.48.2-0ubuntu4.6 is to be installed  
> Depends: libgstreamer1.0-0 (\>= 1.14.1) but 1.8.3-1~ubuntu0.1 is to be installed  
> Depends: libgstreamer1.0-dev (\>= 1.14.1) but 1.8.3-1~ubuntu0.1 is to be installed  
> Depends: libgstreamer-plugins-base1.0-0 (\>= 1.14.1) but 1.8.3-1ubuntu0.3 is to be installed  
> Depends: libgstreamer-plugins-base1.0-dev (\>= 1.14.1) but 1.8.3-1ubuntu0.3 is to be installed  
> Depends: libnvinfer5 (\>= 5.1.2) but it is not installable  
> Depends: libnvinfer-dev (\>= 5.1.2) but it is not installable  
> Depends: libpangocairo-1.0-0 (\>= 1.40.14) but 1.38.1-1 is to be installed  
> E: Unable to correct problems, you have held broken packages.

Q1 - What do i do for solving this problem?  
Q2 - GTX 1080 has special hardware for decoding and encoding or use cuda? If it has special hardware for this task, why use GPU RAM? Also use CPU 11-12%, why use CPU? is’t done all on GPU?

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**Author:** ![Amycao](https://sea2.discourse-cdn.com/nvidia/user_avatar/forums.developer.nvidia.com/amycao/32/11342_2.png) [@Amycao](https://forums.developer.nvidia.com/u/Amycao)\
**Post date:** [April 14, 2020, 3:06am UTC](https://forums.developer.nvidia.com/t/decode-multi-stream-with-gtx-1080-using-deepstream-sdk/119340/3 "2020-04-14T03:06:02Z")

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Q1 - What do i do for solving this problem?

→ deepstream version 4.0 or above use ubuntu 18.04, you need to upgrade the os, or you can use docker to run.

Q2 - GTX 1080 has special hardware for decoding and encoding or use cuda? If it has special hardware for this task, why use GPU RAM? Also use CPU 11-12%, why use CPU? is’t done all on GPU?

→ GTX 1080 have dedicated hardware for decoding, please  
see this, [https://developer.nvidia.com/video-encode-decode-gpu-support-matrix#Decoder](https://developer.nvidia.com/video-encode-decode-gpu-support-matrix#Decoder), search 1080  
the pipeline you used include code which needs run on CPU and GPU. and please noted GPU and video engine share same device memory.

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**Author:** ![LoveNvidia](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@LoveNvidia](https://forums.developer.nvidia.com/u/LoveNvidia)\
**Post date:** [April 14, 2020, 9:24am UTC](https://forums.developer.nvidia.com/t/decode-multi-stream-with-gtx-1080-using-deepstream-sdk/119340/4 "2020-04-14T09:24:37Z")

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Thanks a lot.

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**Author:** ![TomNVIDIA](https://sea2.discourse-cdn.com/nvidia/user_avatar/forums.developer.nvidia.com/tomnvidia/32/14181_2.png) [@TomNVIDIA](https://forums.developer.nvidia.com/u/TomNVIDIA)\
**Post date:** [October 12, 2021, 4:18pm UTC](https://forums.developer.nvidia.com/t/decode-multi-stream-with-gtx-1080-using-deepstream-sdk/119340/6 "2021-10-12T16:18:06Z")

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Closed on October 12, 2021, 4:18pm UTC