You can ingest closed caption files using XML manifest files.
To ingest closed caption files using an XML Manifest File
Create an XML manifest file with the format described in Ingesting Closed Caption Files. For closed
caption ingestion to occur, the <media:subTitle> element must exist.
Upload the closed caption file or video to the FTP/Web server.
Upload the XML manifest file you created to the FTP/Web server.
When all the files are uploaded, Backlot begins ingesting the files.