################################################################################
# SPDX-FileCopyrightText: Copyright (c) 2019-2021 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
# SPDX-License-Identifier: Apache-2.0
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
################################################################################

================================================================================
DeepStream SDK Python Bindings
================================================================================
Setup pre-requisites:
- Ubuntu 20.04
- NVIDIA DeepStream SDK 6.1.1
- Python 3.8
- Gst-python

--------------------------------------------------------------------------------
Package Contents
--------------------------------------------------------------------------------
1. DeepStream Python bindings located in bindings dir
   with installation instructions in bindings/README.md

2. DeepStream test apps in Python
   The following test apps are available:
   deepstream-test1
   deepstream-test2
   deepstream-test3
   deepstream-test4
   deepstream-imagedata-multistream
   deepstream-imagedata-multistream-redaction
   deepstream-ssd-parser
   deepstream-test1-rtsp-out
   deepstream-rtsp-in-rtsp-out
   deepstream-test1-usbcam
   deepstream-opticalflow
   deepstream-segmentation
   deepstream-nvdsanalytics
   deepstream-preprocess-test
   runtime_source_add_delete

--------------------------------------------------------------------------------
Installing Pre-requisites:
--------------------------------------------------------------------------------

DeepStream SDK 6.1.1
--------------------
Download and install from https://developer.nvidia.com/deepstream-download

Python 3.8
----------
Should be already installed with Ubuntu 20.04

Gst-python
----------
Should be already installed on Jetson
If missing, install with the following steps:
$ sudo apt update
$ sudo apt install python3-gi python3-dev python3-gst-1.0 -y

--------------------------------------------------------------------------------
Running the samples
--------------------------------------------------------------------------------
The apps are configured to work from inside the DeepStream SDK 6.1.1 installation.

Clone the deepstream_python_apps repo under <DeepStream ROOT>/sources:
$ git clone https://github.com/NVIDIA-AI-IOT/deepstream_python_apps
This will create the following directory:
<DeepStream ROOT>/sources/deepstream_python_apps

Follow README in each app's directory to run the app.

Example: running test1 app:
$ cd deepstream-test1
$ python3 deepstream_test_1.py <input .h264 file>

--------------------------------------------------------------------------------
Running the samples inside DeepStream SDK docker
--------------------------------------------------------------------------------
The general steps are:
1. Pull the DeepStream SDK docker of choice following the latest DeepStream
   Release Notes at https://developer.nvidia.com/deepstream-sdk for more info.
   Note that the deepstream-ssd-parser app requires the Triton docker on x86_64.
2. Run the docker with Python Bindings mapped using the following option:
   -v <path to this python bindings directory>:/opt/nvidia/deepstream/deepstream/sources/python
3. Inside the container, install packages required by all samples:
   $ sudo apt update
   $ sudo apt install python3-gi python3-dev python3-gst-1.0 -y
4. Optionally install additional dependencies required by specific samples.
   See README in app's directory for such requirements.
   $ sudo apt install python3-opencv
   $ sudo apt install python3-numpy
   $ sudo apt install libgstrtspserver-1.0-0 gstreamer1.0-rtsp
   $ sudo apt install libgirepository1.0-dev
   $ sudo apt install gobject-introspection gir1.2-gst-rtsp-server-1.0
5. Run sample apps following directions in each app's README.

--------------------------------------------------------------------------------
Notes:
--------------------------------------------------------------------------------
As with DeepStream SDK, if the application runs into errors, cannot create gst elements, 
try again after removing gstreamer cache
   rm ${HOME}/.cache/gstreamer-1.0/*
