Hello,
This somewhat follows this post: Flutter application in a docker container on an IMX8 on Torizon - Technical Support - Toradex Community
To Reproduce
- Verdin iMX8M Plus on Dahlia Carrier Board
- TorizonCore 6.1.0 (There is just a device tree overlay modification to run the DSI to LVDS adapter on a 7 inch panel)
Essentially, I have a bundled flutter application that uses the Sony video player plugin extension for Flutter. In the background it just uses gstreamer. So here is what (so far) the Dockerfile looks like:
####################################################################################################################
FROM --platform=linux/arm64/v8 arm64v8/ubuntu:20.04 AS build
ARG DEBIAN_FRONTEND=noninteractive
# Build environment dependencies for flutter-elinux
RUN apt-get -y update && apt-get install -y \
build-essential clang cmake \
curl git pkg-config \
ninja-build unzip wget \
libgtk2.0-dev libglib2.0-dev libgstreamer1.0-dev libgstreamer-plugins-base1.0-dev \
libegl1-mesa-dev libxkbcommon-dev libgles2-mesa-dev \
libwayland-dev wayland-protocols \
locales
# Set the locale
RUN sed -i '/en_US.UTF-8/s/^# //g' /etc/locale.gen && \
locale-gen
ENV LANG en_US.UTF-8
ENV LANGUAGE en_US:en
ENV LC_ALL en_US.UTF-8
# Non root user
RUN groupadd -r -g 1441 flutter && useradd --no-log-init -r -u 1441 -g flutter -m flutter
USER flutter:flutter
WORKDIR /home/flutter
# Flutter 3.3.10 needs to be used (at this sha in particular) because 3.7 has this open issue:
# https://github.com/flutter/flutter/issues/116703 (as of 07.03.2023)
RUN git clone https://github.com/sony/flutter-elinux.git &&\
cd flutter-elinux &&\
git reset --hard 19a1b05ea20675c36c705955c4148ad40b205161 &&\
cd ..
# Add flutter-elinux to the path
ENV PATH="${PATH}:/home/flutter/flutter-elinux/bin"
# While not necessary, running flutter-elinux for the first time builds it
RUN flutter-elinux devices
RUN flutter-elinux doctor
# Add the video player application
RUN git clone https://github.com/sony/flutter-elinux-plugins.git
# Get the Gallery Application
RUN cd flutter-elinux-plugins/packages/video_player/example &&\
flutter-elinux create . &&\
flutter-elinux upgrade && flutter-elinux clean && flutter-elinux pub get &&\
flutter-elinux build elinux
####################################################################################################################
FROM --platform=linux/arm64/v8 torizon/weston-vivante:2 AS runtime
ARG IMAGE_ARCH
RUN mkdir -p /app/gui
RUN apt-get -y update && apt-get install -y \
alsa-utils \
libasound2 \
psmisc \
procps pciutils \
libgstreamer1.0-0 \
gstreamer1.0-plugins-base \
gstreamer1.0-plugins-good \
gstreamer1.0-plugins-bad \
gstreamer1.0-plugins-ugly \
gstreamer1.0-libav \
gstreamer1.0-doc \
gstreamer1.0-tools \
gstreamer1.0-x \
gstreamer1.0-alsa \
gstreamer1.0-gl \
gstreamer1.0-gtk3 \
gstreamer1.0-pulseaudio \
v4l-utils \
locales
# Set the locale
RUN sed -i '/en_US.UTF-8/s/^# //g' /etc/locale.gen && \
locale-gen
ENV LANG en_US.UTF-8
ENV LANGUAGE en_US:en
ENV LC_ALL en_US.UTF-8
# Get the flutter bundle built in the build environment
COPY --from=build /home/flutter/flutter-elinux-plugins/packages/video_player/example/build/elinux/arm64/release/bundle /app/gui/bundle
# The .so libraries (notably libflutter_engine.so) must be in the library path
# to properly execute the flutter_app. Some plugin (like the elinux video_player plugin)
# also generate a .so library, and NEED to be in the library path.
COPY --from=build /homeflutter/flutter-elinux-plugins/packages/video_player/example/build/elinux/arm64/release/bundle/lib /lib/
WORKDIR /app/gui/bundle/
ENV PATH="/app/gui:${PATH}"
ENTRYPOINT ["./video_player_example"]
CMD [ "-f", "-b", "../bundle/"]
To build the docker image containing the flutter application, from the host, on the folder where the Dockerfile is:
docker run --rm -it --privileged torizon/binfmt
docker buildx build --platform=linux/arm64 -t flutter-videoplayer:latest .
docker save flutter-videoplayer:latest > ./flutter-vp.tar
scp flutter-vp.tar torizon@ip.address:/home/torizon
If I try to launch the flutter application, I get the following error:
torizon@verdin-imx8mp-sn:~$ docker load < flutter-vp.tar
torizon@verdin-imx8mp-sn:~$ docker stop $(docker ps -a -q)
torizon@verdin-imx8mp-sn:~$ docker run -e ACCEPT_FSL_EULA=1 -d --rm --name=weston --net=host --cap-add CAP_SYS_TTY_CONFIG \
-v /dev:/dev -v /tmp:/tmp -v /run/udev/:/run/udev/ \
--device-cgroup-rule='c 4:* rmw' --device-cgroup-rule='c 13:* rmw' \
--device-cgroup-rule='c 199:* rmw' --device-cgroup-rule='c 226:* rmw' \
torizon/weston-vivante:$CT_TAG_WESTON_VIVANTE --developer weston-launch \
--tty=/dev/tty7 --user=torizon
torizon@verdin-imx8mp-sn:~$ docker run -e ACCEPT_FSL_EULA=1 --rm -it --name=vivante-hello \
-v /tmp:/tmp -v /dev/dri:/dev/dri \
-v /dev/galcore:/dev/galcore \
--device /dev/snd \
--device-cgroup-rule='c 199:* rmw' \
--device-cgroup-rule='c 226:* rmw' \
--entrypoint bash flutter-videoplayer:latest
root@2acf38bcfe96:/app/gui/bundle# ./video_player_example -b ../bundle/
xdg_surface@16: error 3: xdg_surface has never been configured
EGL: errno=71 (Protocol error)
EGL: errno=71 (Protocol error)
EGL: errno=71 (Protocol error)
EGL: errno=71 (Protocol error)
...
But, the weird thing is that, if I run:
gst-launch-1.0 videotestsrc ! videoconvert ! waylandsink
And then, I run the flutter-app: ./video_player_example -b ../bundle/, this works flawlessly
Question is, what does launching a gstreamer video pipeline does that then enable a flutter app using a gstreamer plugin to then work?
Other information
With Yocto, this never happenned. Also, we can use the NXP’s imx gstreamer plugins with Yocto, but how can we do that with TorizonCore?