vdealer
A simple video device and streaming video duplication utility for linux (AARCH64 / NVIDIA Jetson TX2)
vdealer runs a script 'video_startup.sh', which does:
-
uses v4l2loopback to duplicate an existing video device /dev/video# to n other device copies.
modprobe v4l2loopback video_nr=5,6,7# duplicates /dev/video1 to /dev/video5, /dev/video6, and /dev/video7 -
uses ffmpeg to stream from /dev/video* to the extra devices created in (1)
ffmpeg -f v4l2 -i /dev/video1 -f v4l2 /dev/video5 -f v4l2 /dev/video6# streams output from /dev/video1 to /dev/video5 and 6 -
upon termination of the docker container, cleans up the ffmpeg streams and removes the devices created in (1)
Usage:
Run as a docker container:
docker run --name vdealer -it --rm --privileged --ipc=host --cap-add=ALL -v /dev:/dev -v /lib/modules:/lib/modules aarch64-tx2-vdealer
Because the container is pre-build with the CMD option, it will launch its script 'video_startup.sh' automatically Options: '-it' will run interactive, '-td' willrun in detached mode
Build:
Build the docker container on your AARCH64 system:
docker build -f Dockerfile -t aarch64-tx2-vdealer .
(or just pull the image: docker pull openhorizon/aarch64-tx2-vdealer)
Prerequisites:
OS / Architecture / System: Linux / AARCH64 / NVIDIA Jetson TX2 (as tested) Supporting Kernel Modules: The kernel module v4l2loopback is required*
Caveats and Cautions:
This container is built to run on the NVIDIA Jetson TX2 with a custom kernel (compiled with these instructions), running JetPack3.1.
*Caution: v4l2loopback must be built from umlaeute's source, or you may run into (serious) device problems if kernel software conflicts.