How ID3 metadata actions work
You can set up an action to insert ID3 data in the channel. The action inserts ID3 metadata in outputs where ID3 passthrough is enabled. You must specify a fully formed ID3 metadata item (including both a header and a frame, as per the ID3 specification) and encode it as base64. MediaLive inserts the metadata once, at the time that you specify.
Before you add ID3 metadata actions to the schedule, read Working with ID3 metadata.
Insert ID3 metadata with fixed start
When you create the action, you include a start time. The start time for the action must be at least 15 seconds in the future but not more than 14 days in the future. After that cutoff, MediaLive rejects the request to create the action.
After you have created the action, the action sits in the schedule. Approximately 15 seconds before the start time, the schedule passes the action to the channel. At the start time, the channel inserts the data into the channel.
Insert ID3 metadata with immediate start
When you create the action, you set the start type to immediate.
The schedule immediately passes the action to the channel. The channel immediately inserts the data into the channel.