Introduction
Pipewire is a server and user space API to deal with multimedia pipelines.This page dedicated to bringing up and validation of multiple sample application with pipewire in RPI-3 B+ target.
Get the list of captured encoded data file(pipewirexxxyyy.h264) from /tmp directory and play it in VLC player.
Build and Flash Procedure
RDK-C rdk-next Yocto 3.1 dunfell build for Raspberrypi
Validation Steps
STEP 1:
Add require SSID and PSK in /etc/wpa_supplicant.conf file in below format
network={
ssid="username"
psk="password"
}
ctrl_interface=/var/run/wpa_supplicant
ctrl_interface_group=0
update_config=1
network={
ssid="XXX"
psk="YYYYY"
}
STEP 2:
Reboot the Target
After Reboot don't do step 1 and 2.
Note : Step 1 & 2 is only applicable for fresh target boot-up with new image.
STEP 3:
WiFi connection is must needed for this validation to copy the encoded data file(pipewirexxxyyy.h264) to local PC.
Check WiFi connection by using below command.
ifconfig
root@raspberrypi3-rdk-camera:~# ifconfig
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:87 errors:0 dropped:0 overruns:0 frame:0
TX packets:87 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:4552 (4.4 KiB) TX bytes:4552 (4.4 KiB)
wlan0 Link encap:Ethernet HWaddr B8:27:EB:2E:72:2B
inet addr:192.168.43.246 Bcast:192.168.43.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:23 errors:0 dropped:0 overruns:0 frame:0
TX packets:44 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:2893 (2.8 KiB) TX bytes:5887 (5.7 KiB)
STEP 4:
Before validate this use case we should stop rms binary and mediastreamer binary with below command.
systemctl stop rms-launcher
systemctl stop mst-launcher
STEP 5:
Use the below command to export PATH variable
export PATH=/usr/local/bin:/usr/bin:/bin:/usr/local/sbin:/usr/sbin:/sbin:/usr/libexec/installed-tests/pipewire-0.3/examples
root@raspberrypi3-rdk-camera:~# export PATH=/usr/local/bin:/usr/bin:/bin:/usr/local/sbin:/usr/sbin:/sbin:/usr/libexec/installed-tests/pipewire-0.3/examples
STEP 6:
Before trigger the pipewire binaries, We need to enable "repeat_sequence_header" in v4l2 driver to validate multiple sample application.
root@raspberrypi3-rdk-camera:~# v4l2-ctl --set-ctrl=repeat_sequence_header=1
STEP 7:
Run the pipewire binary with below command
pipewire &
root@raspberrypi3-rdk-camera:~# pipewire &
STEP 8:
Run the pipewire media session binary with below command
pipewire-media-session &
root@raspberrypi3-rdk-camera:~# pipewire-media-session &
STEP 9:
Run the sample application binary with below command.
If you want to validate multiple application then run this binaries at multiple time.
For example : If you want to validate three application then run this binary at three times and then buffer file will be store in /tmp directory with date and time.
pw-capture
root@raspberrypi3-rdk-camera:~# pw-capture &
STEP 10:
Get encoded data available file from local /tmp directory.
root@raspberrypi0-rdk-camera:~# cd /tmp/
root@raspberrypi3-rdk-camera:/tmp# ls pip*
pipewire2021-07-12:04:22:46.h264 pipewire2021-07-12:04:22:53.h264 pipewire2021-07-12:04:22:56.h264
STEP 11:
Copy encoded data available file from your RPI /tmp directory into your local PC and play it in VLC player.
xxxxxx@yyyyy-Lenovo-B480:~/XXXXX$ scp root@RPI_DEVICE_WIFI_IP:/tmp/pipewire2021-07-12:04:22:46.h264 .
Example:
xxxxxx@yyyyy-Lenovo-B480:~/XXXXX$ scp root@192.168.43.246:/tmp/pipewire2021-07-12:04:22:46.h264 .
pipewire2021-07-12:04:22:46.h264 100% 16KB 16.4KB/s 00:00
xxxxxx@yyyyy-Lenovo-B480:~/XXXXX$
STEP 12:
We need to give demux module as "H264 video demuxer" in VLC player to play h264 file.
Please follow "Part 2: How to Play H.264 Files on VLC" option in below link to enable demux module in VLC player
https://reolink.com/how-to-play-h264-files-in-vlc/
Play the pipewirexxxyyy.h264 file in VLC player.
