nvidia TAO有很多预训练模型，如：
##### Detection Network
- Faster-RCNN / YoloV3 / SSD / DSSD / RetinaNet / YoloV4 ?(https://ngc.nvidia.com/catalog/models/nvidia:tao:Faster-RCNN)
- DetectNet_v2 (https://catalog.ngc.nvidia.com/orgs/nvidia/teams/tao/models/pretrained_detectnet_v2)
##### Classification Network
- multi_task (https://ngc.nvidia.com/catalog/models/nvidia:tao:pretrained_image_classification)
##### Other Networks
- DashCamNet (https://ngc.nvidia.com/catalog/models/nvidia:tao:dashcamnet)
- VehicleMakeNet (https://ngc.nvidia.com/catalog/models/nvidia:tao:vehiclemakenet)
- VehicleTypeNet (https://ngc.nvidia.com/catalog/models/nvidia:tao:vehicletypenet)
- TrafficeCamNet (https://ngc.nvidia.com/catalog/models/nvidia:tao:trafficcamnet)
- PeopleNet (https://ngc.nvidia.com/catalog/models/nvidia:tao:peoplenet)
- FaceDetectIR (https://ngc.nvidia.com/catalog/models/nvidia:tao:facedetectir)
- PeopleSegNet (https://ngc.nvidia.com/catalog/models/nvidia:tao:peoplesegnet)
- PeopleSemSegnet (https://ngc.nvidia.com/catalog/models/nvidia:tao:peoplesemsegnet)
可以把这些模型放到deepstream中测试，步骤如下：
1 获取配置文件
$ git clone https://github.com/NVIDIA-AI-IOT/deepstream_reference_apps.git
$ cd deepstream_reference_apps/deepstream_app_tao_configs/
$ sudo cp -a * /opt/nvidia/deepstream/deepstream/samples/configs/tao_pretrained_models/
2 下载模型
$ sudo apt install -y wget zip
$ cd /opt/nvidia/deepstream/deepstream/samples/configs/tao_pretrained_models/
$ sudo ./download_models.sh
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3 运行Yolo
./deepstream-app ?-c ../../../../samples/configs/tao_pretrained_models/deepstream_app_source1_detection_models.txt
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