What is MetaData?
The metadata of a file or stream describes its contents. In streaming, a live stream or a file encoder adds metadata to the stream or file during encoding. Playback clients use this metadata to display the stream properly. For example, a file will include duration information in the metadata that is used to configure a Seek bar for on-demand play. Metadata that contains width and height information is commonly used to determine and display the correct aspect ratio for live streams on playback clients. The Wowza Transcoder, a live encoder, adds metadata to transcoded renditions.