Update README.md to add examples and doc on digest auth

README.md

@@ -6,7 +6,7 @@
 [![Docker Pulls](https://img.shields.io/docker/pulls/ullaakut/rtspatt.svg?style=flat)](https://hub.docker.com/r/ullaakut/rtspatt/)
 [![Latest release](https://img.shields.io/github/release/EtixLabs/RTSPAllTheThings.svg?style=flat)](https://github.com/EtixLabs/RTSPAllTheThings/releases/latest)
 
-### A multipurpose RTSP media server that can simulate RTSP cameras, broadcast RTSP streams, webcams and even create test videos or serve video files.
+**A multipurpose RTSP media server that can simulate RTSP cameras, broadcast RTSP streams, webcams and even create test videos or serve video files.**
 
 ## Dependencies
 
@@ -33,6 +33,7 @@ docker run --rm \
        [-e RTSP_FRAMERATE=your_framerate] \
        [-e INPUT=your_input] \
        [-e ENABLE_TIME_OVERLAY=true|false] \
+       [-e RTSP_AUTHENTICATION_METHOD=digest|basic] \
        [-e GST_DEBUG=your_debug_level] \
        ullaakut/rtspatt
 ```
@@ -47,6 +48,7 @@ docker run --rm \
       [-s rtsp_resolution] \
       [-f rtsp_framerate] \
       [-t] \
+      [-d] \
       [-i input]
 ```
 
@@ -64,24 +66,33 @@ All of these environment variables and command line arguments override the defau
 * `RTSP_PASSWORD` | `-p`:
   If you want to enable security on your stream, using this option will allow you to specify the password required to access your stream [default: none]
 * `RTSP_RESOLUTION` | `-s`:
-  The resolution at which you want to stream [default: `1280x720`] - RTSPATT will have to do encoding to resize the stream (CPU usage)
+  The resolution at which you want to stream [default: `1280x720`] - RTSPATT will have to do encoding to resize the stream (Increased CPU usage)
 * `RTSP_FRAMERATE` | `-f`:
-  The desired output framerate for your stream [default: `25`] - RTSPATT will have to do encoding to change the framerate (CPU usage)
+  The desired output framerate for your stream [default: `25`] - RTSPATT will have to do encoding to change the framerate (Increased CPU usage)
 * `INPUT` | `-i`:
   Input used as video source. [default: `pattern:smtpe`]
   - If the argument starts with `rtsp://` it will try to open it as an **RTSP stream**
   - If it starts with `pattern:` if will create a **test video with the given pattern** (_see [this link](https://gstreamer.freedesktop.org/data/doc/gstreamer/head/gst-plugins-base-plugins/html/gst-plugins-base-plugins-videotestsrc.html#GstVideoTestSrcPattern) for more information on this argument_)
   - If the argument starts with `/dev/video` it will create a stream from the /dev/video device passed into docker at the launch of the instance. You will need to pass in the video device as follows: `--device=/dev/video0:/dev/video0` where `video0` is the video device.
   - Otherwise it will use the argument as a absolute link to **file input**. Remember to use the `-v` option to insert a video into your container if you want to read it. Example: `docker run -e INPUT=/tmp/video.mp4 -v /home/test/documents/myVideo.mp4:/tmp/video -p 8554:8554 ullaakut/rtspatt`. The repository contains a 30 second sample video in the `samples` folder.
 * `ENABLE_TIME_OVERLAY` | `-t`:
-  If the environment variable is set to true or the command line flag is used, a time overlay will be added to the stream. This can be useful to debug latency. [default: disabled] - RTSPATT will have to do encoding to add the time (CPU usage)
+  If the environment variable is set to true or the command line flag is used, a time overlay will be added to the stream. This can be useful to debug latency. [default: disabled] - RTSPATT will have to do encoding to add the time (Increased CPU usage)
+* `RTSP_AUTHENTICATION_METHOD` | `-d`:
+  If RTSP_AUTHENTICATION_METHOD is set to `digest` or the command line flag is used, the authentication will be done using digest instead of basic auth. [default: basic]
 * `GST_DEBUG`:
   The desired debug level for GStreamer [default: none] (_see [this link](https://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gst-running.html) for more information on this variable_)
 
 ## Examples
 
 <p align="center"><img src="https://preview.ibb.co/emxVna/Example_Screen_Shot.png" alt="Ball"></p>
 
+> Serve video using basic auth on `rtsp:admin:test@//0.0.0.0:8554/live.sdp`
+
+`docker run --rm -e RTSP_USERNAME=admin  -e RTSP_PASSWORD=test -p 8554:8554 rtspatt`
+
+> Serve video using digest auth on `rtsp:admin:test@//0.0.0.0:8554/live.sdp`
+
+`docker run --rm -e RTSP_AUTHENTICATION_METHOD=digest -e RTSP_USERNAME=admin  -e RTSP_PASSWORD=test -p 8554:8554 rtspatt`
 
 > Launch an RTSP stream on `rtsp://0.0.0.0:8554/live.sdp` with a snow pattern and a resolution of 960x600 pixels:
 
@@ -92,6 +103,7 @@ All of these environment variables and command line arguments override the defau
 `docker run --rm -e INPUT="rtsp://root:root@camera_ip:554/live.sdp" -e RTSP_FRAMERATE=12 -p 8554:8554 ullaakut/rtspatt` or `./rtspatt -i rtsp://root:root@camera_ip:554/live.sdp -f 12`
 
 > Broadcast a video stream from a connected device:
+
 `docker run --rm -e INPUT="/dev/video0" --device=/dev/video0:/dev/video0 -p 8554:8554 rtspatt`
 
 > Serve a video file on a specific address and route:
@@ -112,6 +124,7 @@ With default options, stream will be available at `rtsp://0.0.0.0:8554/live.sdp`
 You can use [override options](#override-options).
 
 ## Patterns
+
 Here is the list of patterns you can use
 
 * `pattern:smpte`               - The standard SMTPE test pattern, it's the default value if you don't specify any input