twitcher

a twitch extension to control your pi from a twitchbot while streaming

0/ Project Structure

The codebase is currently half python half nodejs. The node js part connects to a twitch bot to be able to receive messages from the chat. Once a message is recieved, based on if it's left or right, a python script recieves the direction for the stepper motor to rurn either right or left.

node express_app/index.js

1/ To stream you need a client ID & a Key that you need to get from

https://id.twitch.tv/oauth2/authorize?client_id=[your client ID]&redirect_uri=http://localhost&response_type=token &scope=channel:moderate+chat:edit+chat:read

2/ Send the camera module stream to twitch

Set width and height of output video

WIDTH=1920
HEIGHT=1080

Set output framerate

FRAMERATE=30

Set keyframe spacing (must be double the framerate)

KEYFRAME=60

Set bitrate (Twitch recommends 3500000)

BITRATE=3500000

Set stream URL

URL=rtmp://maa01.contribute.live-video.net/app

Set stream key

KEY=live_101362215_q17lXWrNVX8nB8E8OmCiFw05XedLdG

Command

raspivid -n -t 0 -w $WIDTH -h $HEIGHT -fps $FRAMERATE -b $BITRATE -g $KEYFRAME -o - | ffmpeg -f lavfi -i anullsrc -c:a aac -r $FRAMERATE -i - -g $KEYFRAME -strict experimental -threads 4 -vcodec copy -map 0:a -map 1:v -b:v $BITRATE -preset ultrafast -f flv "${URL}/${KEY}"

4/ As long as you are streaming, maybe you want to have a time lapse

Basically I need to capture then send pictures to S3 where I will view them later from a gallery or something, maybe even process a video based on the images and stream it, let's see

1- Upload images to AWS S3 with BOTO 3 install python3 install pip3:

sudo apt install python3-pip

install boto3

pip3 install boto3

2- Take pictures from the camera module

pip3 install picamera

5/ Cronjob

Run the python code every 10 minutes

*/10 * * * * python3 /home/pi/Desktop/timelapse/theScreenShooter.py >> /home/pi/Desktop/timelapse/log.txt 2>&1

6/ View the images

It's better to download them with the AWS CLI [On mac there is a install file for that] using the following command:

aws s3 sync s3://empakt.io/ .

7/ Transform the Images to a video

ffmpeg -framerate 1 -pattern_type glob -i '*.jpg' video.mp4

8/ Run the stream on startup

Go to /etc/systemd/system/ and create a new file: twitcher.service Put this content inside:

[Unit]
Description=raspivid
Wants=network-online.target
After=network.target

[Service]
ExecStart=[Link to your script that runs the twitch stream]

[Install]
WantedBy=multi-user.target

Save the file:

systemctl enable twitcher
systemctl daemon-reload
systemctl start twitcher
systemctl status twitcher