Opencast Capture Agent Display

Software backend for displays showing the current state of Opencast capture agents.

Build & Run

Make sure to install Go. This should be something like:

❯ dnf install golang

Then run the project with:

❯ go run main.go

…or build a static binary:

❯ go build

Example

The display control in action:

opencast-ca-display-prototype.mp4

• The display and laptop do not know about each other
• The laptop is running an Opencast capture agent
• When the laptop starts capturing video, the display shows an active recording

Opencast User

To improve security, you can limit the access rights for the Opencast user by creating a user which has only read access to the capture agent status API and nothing else.

To do this, first create a new security rule in your Opencast's etc/security/mh_default_org.xml allowing read access for a new role ROLE_CAPTURE_AGENT_CALENDAR:

<!-- Enable capture agent updates and ingest -->
<sec:intercept-url pattern="/capture-admin/agents/**" method="GET" access="ROLE_ADMIN, ROLE_CAPTURE_AGENT, ROLE_CAPTURE_AGENT_CALENDAR" />
<sec:intercept-url pattern="/capture-admin/**" access="ROLE_ADMIN, ROLE_CAPTURE_AGENT" />

Next, go to the Opencast REST Docs → /user-utils and fill out the form for POST / with data like this:

• username: ca-display
• password: secret-password
• roles: ["ROLE_CAPTURE_AGENT_CALENDAR"]

You should now be able to use this new user.