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A simple wireless display receiver/sink for Raspberry Pi

Project description

Travis test status Documentation status


picast is a simple wifi display receiver written by Python3 on Raspberry Pi. Current status is early alpha. Bug reports and contributions are welcome.


picast depends several external utilities and some are only on Raspbian.

  • tvservice (raspbian only)

  • udhcpd (debian/ubuntu only)

  • wpa_supplicant

  • wpa_cli

  • vlc

Installation and run

Run apt install command on Raspbian(buster or later) / Raspberry Pi Zero W/WH, RaPi 3B+, RaPi 4.

$ sudo apt install net-tools python3 udhcpd python-gst-1.0 libgtk-3-dev python3-gi python3-pip gir1.2-gtk-3.0
$ sudo apt install gir1.2-gstreamer-1.0 gir1.2-gst-plugins-base-1.0
$ sudo apt install gstreamer1.0-plugins-good gstreamer1.0-gtk3 gstreamer1.0-plugins-rtp
$ sudo apt install gstreamer1.0-omx-rpi gstreamer1.0-omx-rpi-config vlc
$ sudo apt install --no-install-recommends lxde
$ python3 -m pip install picast
$ picast


When you want customize for your environment, please copy picast/settings.ini to your favorit place and edit it.

then launch picast such as follows:

$ picast --config /home/pi/settings.ini


It is recommended to use virtualenv to deploy development environment. Because python3-gi module is a binding library to GTK++ libraray, so it is not easy to install using python standard pip.

It is recommended to use system’s site-packages python3-gi library.

$ sudo apt install gstreamer1.0-tools
$ git clone picast
$ cd picast
$ python3 -m venv --system-site-packages venv
$ source venv/bin/activate

And then install picast as an editable development environment.

$ pip install -e .

Then you can launch in increased debug level.

$ picast --debug

Debug log

There is a debug log at /var/tmp/picast.log. It is configured in logging.ini.


It is recommended to use PyCharm professional edition, which has a remote deploy and debug feature.


Increase GPU memory for decoding fullHD video stream. add gpu_mem=128 to /boot/config.txt


Picast search for the wireless display named “picast” on the source device you want to cast. Use “12345678” for a WPS PIN number. It is recommended to initiate the termination of the receiver on the source side. After Pi connects to the source, it has an IP address of

These parameters are configured in settings.ini.


Edit /home/pi/.config/lxsessions/LXDE/autostart

@xscreensaver -no-splash
@lxterminal -l -e /home/pi/picast/bin/picast

Known issues

  • Latency: Limited by the implementation of the RTP player used.

  • WiFi: The on-board WiFi chip on Pi 3/Zero W only supports 2.4GHz. Due to the overcrowded nature of the 2.4GHz spectrum and the use of unreliable rtp transmission, you may experience some video glitching/audio stuttering. It may be better with Pi 3B+/4 that support IEEE802.11ac 5GHz.

  • HDCP(content protection): Neither the key nor the hardware is available on Pi and therefore is not supported.

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