Manages packet trailer extraction for received video tracks.
When a track's TrackInfo indicates packet trailer features, the manager
wires up an encoded frame transform to strip the trailer from encoded frames
and cache the metadata for lookup.
Packet trailer extraction is worker-only. If no worker is configured, the
SDK does not advertise packet trailer support and skips extraction.
When E2EE is active, the E2EE FrameCryptor worker handles trailer
extraction directly (before decryption), so this manager only creates
the extractor/metadata cache — no separate pipeline is installed.
Manages packet trailer extraction for received video tracks.
When a track's TrackInfo indicates packet trailer features, the manager wires up an encoded frame transform to strip the trailer from encoded frames and cache the metadata for lookup.
Packet trailer extraction is worker-only. If no worker is configured, the SDK does not advertise packet trailer support and skips extraction.
When E2EE is active, the E2EE FrameCryptor worker handles trailer extraction directly (before decryption), so this manager only creates the extractor/metadata cache — no separate pipeline is installed.