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AWS Elemental MediaLive
User Guide

Rules for Handling Captions

Your ability to output captions in a given format depends on the following factors:

  • The type of input container

  • The format of the input captions

  • The type of output container

For a given input container, AWS Elemental MediaLive can parse certain captions formats. For a given captions format in the source, AWS Elemental MediaLive can create one or more output captions. A given output caption can appear only in specific output containers.

Looking at the rule the other way round – starting from the output container you want to produce:

  • A given output container supports a given set of output caption formats. So your choice of output captions is constrained by the output container.

  • Furthermore, each output caption format can be produced only from some source formats and not from others. And some source formats can appear in some input containers and not in others. So your choice of output caption formats is further constrained by the original input container and format.