Installing Moonlight Qt on Raspberry Pi 4 - fipso/moonlight-docs GitHub Wiki

NOTE: If you installed an earlier preview version of Moonlight Qt prior to v2.0.0, you must switch to the official repository to receive the update to v2.0.0 and future updates. To do so, run the the commands listed in the installation section and then those listed in the updates section.

Requirements:

  • Raspberry Pi 4 (earlier Raspberry Pi models may not perform well)
  • Raspberry Pi OS Buster or later (see special Bullseye instructions below)

Hosted By: Cloudsmith

Installation

Run the following commands to install Moonlight Qt to your Raspberry Pi:

curl -1sLf 'https://dl.cloudsmith.io/public/moonlight-game-streaming/moonlight-qt/setup.deb.sh' | distro=raspbian sudo -E bash
sudo apt install moonlight-qt

You can then launch Moonlight from your Raspberry Pi's desktop or via the moonlight-qt command in the terminal.

For best performance, run Moonlight directly from a console/TTY. If you are currently in a desktop environment, you should be able to switch using Ctrl+Alt+(F1-F7). Usually your desktop will be at Ctrl+Alt+F1 or Ctrl+Alt+F7, so you can pick a different TTY that's not being used.

NOTE: If you run Moonlight from a desktop environment with the Raspberry Pi 4, we recommend keeping your Raspberry Pi's display resolution set to 1080p or below. Due to GPU performance limitations on the Pi 4, streaming performance decreases significantly when the Moonlight window is scaled larger than 1080p, even if the stream resolution is 1080p or below. These restrictions do not apply when streaming directly from a console/TTY using the steps above.

Updates

To update Moonlight Qt after you've installed it, run:

sudo apt update
sudo apt upgrade

HEVC and HDR support

Beginning with Moonlight Qt v3.1.2, the Raspberry Pi builds have support for streaming HEVC video using hardware decoding. If you're running Raspberry Pi OS Buster or Bullseye, you may need to perform the steps below to enable this functionality. These steps are not required on the Raspberry Pi 5, Raspberry Pi OS Bookworm, or later OS versions.

To enable HEVC support (only required on older Raspberry Pi OS versions):

  • Add dtoverlay=rpivid-v4l2 to your /boot/config.txt and reboot your Pi.
  • You must run Moonlight directly from the console for HEVC support to be enabled. If you have your Pi set to boot to GUI, you can press Ctrl+Alt+F1 to switch to TTY 1 and run moonlight-qt from there.

If you would also like to stream HDR, perform these additional steps (only required on older Raspberry Pi OS versions):

  • Open /boot/config.txt, change dtoverlay=vc4-fkms-v3d to dtoverlay=vc4-kms-v3d, then reboot your Pi

NOTE: Performing the HDR setup steps will prevent Moonlight from working normally when run within your Pi's desktop environment. You will need to launch Moonlight directly from the console for the video renderer to work properly.

OSMC

OSMC uses a different permission group for input devices than Raspberry Pi OS does. Input devices work, but you will not have any of the extended DS4/DS5 controller features by default.

To fix this, run the following command and reboot:

sudo usermod -a -G input $USER

Raspberry Pi OS Bullseye

Raspberry Pi OS Bullseye defaults to a display driver that doesn't support Moonlight's low-latency H.264 decoder. Unless you have incompatible software on your Pi (like Kodi v19) or need HDR support, we recommend enabling the alternate driver as detailed below.

Do NOT perform these steps on the Raspberry Pi 5 or Raspberry Pi OS Bookworm! They are no longer required and may render your Pi unbootable!

To fix this issue, you can edit the /boot/config.txt file:

  1. Run sudo nano /boot/config.txt
  2. Scroll down using the arrow keys until you see the line that says dtoverlay=vc4-kms-v3d
  3. Change that line to dtoverlay=vc4-fkms-v3d
  4. Press Ctrl+X, press Y, then press Enter
  5. Reboot your Pi

Workarounds for incompatible software (Kodi v19+)

If you are using software that requires vc4-kms-v3d (such as Kodi v19 or later), you can force Moonlight to use the slower V4L2M2M decoder to enable it to function in this scenario. V4L2M2M adds between 1 and 2 frames of additional latency at 1080p compared to the optimal solution above (using vc4-fkms-v3d). This workaround is no longer required on Raspberry Pi 5 or Raspberry Pi OS Bookworm and later.

To enable the V4L2M2M decoder, launch Moonlight with the following command:

H264_DECODER_HINT=h264_v4l2m2m DRM_FORCE_DIRECT=1 moonlight-qt

It is highly recommended that you enable the HEVC decoder (see "HEVC support" above) to avoid the performance cost of V4L2M2M for host PCs that support HEVC encoding (GTX 900 series and newer).

Common problems and solutions

Video decoder error dialog when starting Moonlight or black screen when streaming

This is most likely because you're running Raspberry Pi OS Bullseye or another Linux distro that enables the Full KMS display driver by default.

To fix this, you can follow the steps above in the Raspberry Pi OS Bullseye section.

HDR option cannot be enabled or display doesn't switch to HDR mode

This is most likely because you have not correctly followed all the steps in the HEVC and HDR support section.

If the HDR option cannot be enabled, you have either not enabled the HEVC decoder properly or are running Moonlight from within the desktop environment. Moonlight must be run directly from the console for HDR to be available.

If you can stream HDR but it doesn't switch your TV to HDR mode, you are probably not using the Full KMS driver (vc4-kms-v3d) that is required for HDR metadata to be sent to your TV. Ensure your /boot/config.txt is updated to use vc4-kms-v3d (not vc4-fkms-v3d) and try again.

PS4/PS5 controller features aren't working

This is likely caused by Moonlight not having permission to open /dev/hidraw devices on your Pi. This is a common issue on OSMC, which doesn't use the input group in the same way that Raspberry Pi OS does.

To fix this, run the following command and reboot:

sudo usermod -a -G input $USER

No audio output or crackly audio output

The Raspberry Pi OS team has recently released an update that switches from ALSA to PulseAudio for audio output. In response, Moonlight Qt v3.0.0 now defaults to using PulseAudio on the Raspberry Pi.

If you're running Raspberry Pi OS and experiencing audio problems with Moonlight, you should run the following commands to upgrade your OS with support for PulseAudio:

sudo apt update
sudo apt upgrade
sudo reboot

For older distros that still use ALSA, you may find that audio doesn't work correctly with Moonlight Qt v3.0.0 or later. If that's the case, you can tell Moonlight to use ALSA by running with:

PULSE_SERVER=none moonlight-qt

GUI not appearing when launched from the console

The GUI will appear on the monitor connected to the mini-HDMI port closest to the USB-C power cable. This is the primary display output port.

Make sure your monitor is connected to the correct port if you don't see the UI appear when you start Moonlight from outside the Raspberry Pi desktop environment.

If your monitor is plugged into the primary HDMI output and you still don't see the UI when you start Moonlight from the console, try starting Moonlight with the following command:

QT_QPA_EGLFS_ALWAYS_SET_MODE=1 moonlight-qt

Decoder Errors with a 4K 60 Hz Monitor

If your Raspberry Pi is configured for 4K 60 Hz output, you will need to increase the amount of GPU memory for the hardware video decoder to work.

Run the following commands:

echo "gpu_mem=128" | sudo tee -a /boot/config.txt
sudo reboot