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DshanPI-A1 RK3576 gmrender-resurrect Bilibili Screen Cast

· 4 min read
Yuxuan
Yuxuan
100askTeam yuxuan.

Demo Effect​

https://www.bilibili.com/video/BV1Z646zhEBP

1. Environment Information​

CategoryConfiguration
BoardDshanPI-A1
Main SoCRK3576
Operating SystemArmbian
Desktop EnvironmentGNOME
Window SystemWayland
GPU DriverPanfrost

2. Implementation Principle​

  1. Core component: gmrender-resurrect is a tool that receives DLNA service content and plays it via GStreamer, and can be directly configured as a DLNA client.

  2. Hardware acceleration basis: GStreamer hardware-accelerated video playback has been implemented in advance, meeting the needs of HD stream decoding.

  3. Bilibili screen cast adaptation: When Bilibili casts via DLNA, it sends an H264 stream packaged in FLV (similar to a live stream), which can be played directly with hardware acceleration via gmrender-resurrect.

3. Environment Setup (Install Dependencies)​

1. Install basic build tools​

sudo apt-get install build-essential \
            autoconf \
            automake \
            libtool \
            pkg-config

2. Install DLNA and GStreamer core dependencies​

# Update package sources

sudo apt-get update

# Install DLNA dependencies and GStreamer components (including codec and output plugins)
sudo apt-get install libupnp-dev libgstreamer1.0-dev \
            gstreamer1.0-plugins-base gstreamer1.0-plugins-good \
            gstreamer1.0-plugins-bad gstreamer1.0-plugins-ugly \
			gstreamer1.0-rockchip1 sudo apt install -y libgstreamer-gl1.0-0 \
            gstreamer1.0-libav

# Install audio output plugins (PulseAudio + ALSA)
sudo apt install -y gstreamer1.0-pulseaudio
sudo apt-get install gstreamer1.0-alsa

# Install Git (for pulling source code)
sudo apt-get install git

4. Build gmrender-resurrect​

1. Pull the source code​

git clone https://github.com/hzeller/gmrender-resurrect.git

2. Build and compile​

# Enter the source directory
cd gmrender-resurrect

# Generate configuration files
./autogen.sh

# Configure build parameters
./configure

make

3. Copy the logo files (to avoid startup errors)​

# Copy icons to the system default directory
cp data/grender-128x128.png /usr/local/share/gmediarender/
cp data/grender-64x64.png /usr/local/share/gmediarender/

5. Start the DLNA Screen Cast Service​

# -f "DshanPI-A1": set the display name of the device in the DLNA list
# --gstout-videopipe: custom video output pipeline, force Wayland fullscreen
./src/gmediarender  -f "DshanPI-A1" --gstout-videopipe "waylandsink fullscreen=true"

6. Troubleshooting and Resolution (audio causing video stutter)​

1. Problem phenomenon​

  • When playing video only, it works normally; after adding audio, the video freezes directly.

2. Troubleshooting steps​

Step 1: Check sound card status (found suspended)​

# View the status of all audio output devices
pactl list sinks short
  • The output shows all sound cards are in the SUSPENDED state, and they cannot be activated after running suspend-sink, indicating an abnormal connection between PulseAudio and the hardware.

Step 2: Check audio service usage (found conflict)​

# View processes using audio devices
fuser -v /dev/snd/*
  • The output shows that PulseAudio, WirePlumber, and PipeWire three audio services occupy the device simultaneously, indicating a service conflict (PipeWire and PulseAudio have overlapping functionality, competing for sound card control).

3. Solution (mask the conflicting PulseAudio service)​

Step 1: Mask PulseAudio autostart (user level)​

# Mask the service to prevent autostart
systemctl --user mask pulseaudio
systemctl --user mask pulseaudio.socket

Note: This operation will temporarily make the system unable to recognize PulseAudio devices. To restore, run the unmask command.

Step 2: Force kill residual PulseAudio processes​

pkill -9 pulseaudio

4. Functional verification (ensure audio/video works)​

Verification 1: Audio output test​

# Play a 1000Hz test tone to check whether the speaker outputs sound
gst-launch-1.0 audiotestsrc freq=1000 ! audioconvert ! pulsesink

  • After masking PulseAudio, gst will use alsa to play audio

  • Volume can be controlled via alsamixer

  • Normal sound output indicates the audio link is restored.

Verification 2: Local video playback test​

# Play a local video to check audio-video sync
gst-launch-1.0 playbin uri=file:///root/bad_apple.mp4
  • Normal playback with sound indicates audio-video collaboration is working normally.

5. Restart the DLNA service​

./src/gmediarender  -f "DshanPI-A1" --gstout-videopipe "waylandsink fullscreen=true"

7. Supplement: Restore PulseAudio service (if needed)​

If you need to use PulseAudio later, run the following commands to unmask:

systemctl --user unmask pulseaudio
systemctl --user unmask pulseaudio.socket