[Model] update pptracking letterboxresize and add some comment (#438)

* add override mark

* delete some

* recovery

* recovery

* add tracking

* add tracking py_bind and example

* add pptracking

* add pptracking

* iomanip head file

* add opencv_video lib

* add python libs package

Signed-off-by: ChaoII <849453582@qq.com>

* complete comments

Signed-off-by: ChaoII <849453582@qq.com>

* add jdeTracker_ member variable

Signed-off-by: ChaoII <849453582@qq.com>

* add 'FASTDEPLOY_DECL' macro

Signed-off-by: ChaoII <849453582@qq.com>

* remove kwargs params

Signed-off-by: ChaoII <849453582@qq.com>

* [Doc]update pptracking docs

* delete 'ENABLE_PADDLE_FRONTEND' switch

* add pptracking unit test

* update pptracking unit test

Signed-off-by: ChaoII <849453582@qq.com>

* modify test video file path and remove trt test

* update unit test model url

* remove 'FASTDEPLOY_DECL' macro

Signed-off-by: ChaoII <849453582@qq.com>

* fix build python packages about pptracking on win32

Signed-off-by: ChaoII <849453582@qq.com>

* update comment

Signed-off-by: ChaoII <849453582@qq.com>

* add pptracking model explain

Signed-off-by: ChaoII <849453582@qq.com>

Signed-off-by: ChaoII <849453582@qq.com>
Co-authored-by: Jason <jiangjiajun@baidu.com>

examples/vision/tracking/pptracking/README.md

@@ -0,0 +1,35 @@
+# PP-Tracking模型部署
+
+## 模型版本说明
+
+- [PaddleDetection release/2.5](https://github.com/PaddlePaddle/PaddleDetection/tree/release/2.5)
+
+## 支持模型列表
+
+目前FastDeploy支持如下模型的部署
+
+- [PP-Tracking系列模型](https://github.com/PaddlePaddle/PaddleDetection/blob/release/2.5/configs/mot)
+
+
+## 导出部署模型
+
+在部署前，需要先将训练好的PP-Tracking导出成部署模型，导出PPTracking导出模型步骤，参考文档[导出模型](https://github.com/PaddlePaddle/PaddleDetection/blob/release/2.5/deploy/pptracking/cpp/README.md)。
+
+
+## 下载预训练模型
+
+为了方便开发者的测试，下面提供了PP-Tracking行人跟踪垂类模型，开发者可直接下载使用，更多模型参见[PPTracking](https://github.com/PaddlePaddle/PaddleDetection/blob/release/2.5/deploy/pptracking/README_cn.md)。
+
+| 模型                                                                                                   | 参数大小   | 精度    | 备注 |
+|:-----------------------------------------------------------------------------------------------------|:-------|:----- | :------ |
+| [PP-Tracking](https://bj.bcebos.com/paddlehub/fastdeploy/fairmot_hrnetv2_w18_dlafpn_30e_576x320.tgz) | 51.2MB | - |
+
+**说明**
+- 仅支持JDE模型（JDE，FairMOT，MCFairMOT)；
+- 目前暂不支持SDE模型的部署，待PaddleDetection官方更新SED部署代码后，对SDE模型进行支持。
+
+
+## 详细部署文档
+
+- [Python部署](python)
+- [C++部署](cpp)

examples/vision/tracking/pptracking/cpp/README.md

@@ -22,7 +22,6 @@ make -j
 wget https://bj.bcebos.com/paddlehub/fastdeploy/fairmot_hrnetv2_w18_dlafpn_30e_576x320.tgz
 tar -xvf fairmot_hrnetv2_w18_dlafpn_30e_576x320.tgz
 wget https://bj.bcebos.com/paddlehub/fastdeploy/person.mp4
-wget https://bj.bcebos.com/paddlehub/fastdeploy/person.mp4
 
 
 # CPU推理