feat: add README and useful bash scripts

README.md

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+## Reolink Camera Utility Scripts
+
+This repository contains different bash scripts and commands for reolink camera.
+
+### Requirements
+
+These scripts use **ffmpeg**, to install it you can:
+
+```bash
+apt install ffmpeg    # linux debian-based
+brew install ffmpeg   # mac
+```
+
+If you are using Windows you can download it from [here](https://ffmpeg.org/download.html).
+
+<details>
+  <summary>Why ffmpeg?</summary>
+  I tried **openRTSP** ❌ but half of the video in the MP4 format is without audio and I don't know why.
+
+example:
+
+```bash
+openRTSP -D 1 -c -B 10000000 -b 10000000 -q -Q -F cam_eight -d 28800 -P 10 -t rtsp://"admin":"mypassword"@192.168.0.176:554
+```
+
+source of command and explanation: https://superuser.com/questions/766437/capture-rtsp-stream-from-ip-camera-and-store
+
+I tried **VLC** ❌ but I got some issues saving the files with the audio and managing it.
+
+example command:
+
+```bash
+cvlc rtsp://admin:password@192.168.0.176:554//h264Preview_01_main --sout=file/ts:mystream.mpg
+```
+
+FFmpeg was the best, so I chose it. ✅
+
+</details>
+
+---
+
+### Usage
+
+Download and use the script:
+
+```bash
+git clone https://github.com/ReolinkCameraAPI/scripts
+cd scripts
+```
+
+### download.sh
+
+How to use it:
+
+```bash
+chmod +x download.sh
+./download.sh -u myusername -p mypassowrd -i 192.168.1.197 -t 60 -n 554 -o tmp
+```
+
+- `-u` username of your camera
+- `-p` password of your camera
+- `-i` camera local IP address
+- `-t` is the time in seconds that any file will contain (default value 60)
+- `-n` is the port (default value 554)
+- `-o` output directory path (default `.`, the current directory)
+
+To stop the execution you can type `Ctrl + C`.
+
+This script uses `ffmpeg` to download via RTSP the video and audio from your camera saving it in the MP4 format, the name will start with the `date` of the day (ex. `2022-08-26--22-00-00-capture-0000.mp4`) and a file will be recorded and saved every `$TIME` seconds.  
+The name of the files starts with a date to make it easier the management of the files, like removing easily all the records of a specific month, day or year.
+
+### clean_record.sh
+
+```bash
+chmod +x clean_record.sh
+./clean_record.sh
+```
+
+This script deletes all the records inside a `tmp` directory of the previous month.

clean_records.sh

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+PATH="tmp/"
+MONTHES=1
+
+while getopts p:m: flag
+do
+    case "${flag}" in
+        p) PATH=${OPTARG};;
+        m) MONTHES=${OPTARG};;
+    esac
+done
+
+
+LAST_MONTH=$(date --date='-$MONTHES month' +'%Y-%m')
+rm "$PATH$LAST_MONTH-"*

download.sh

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+# default parameters value
+TIME=60
+PORT=554
+OUTPUT_PATH="."
+
+while getopts u:p:i:t:n:o: flag
+do
+    case "${flag}" in
+        u) USERNAME=${OPTARG};;
+        p) PASSWORD=${OPTARG};;
+        i) IP=${OPTARG};;
+        t) TIME=${OPTARG};;
+        n) PORT=${OPTARG};;
+        o) OUTPUT_PATH=${OPTARG};;
+    esac
+done
+
+ffmpeg -i rtsp://$USERNAME:$PASSWORD@$IP:$PORT/h264Preview_01_main \
+       -c copy \
+       -map 0 \
+       -reset_timestamps 1 \
+       -f segment \
+       -segment_time $TIME \
+       -strftime 1 \
+       -segment_format mp4 \
+       "$OUTPUT_PATH/%Y-%m-%d--%H-%M-%S--capture-%04d.mp4"