AWS Elemental MediaConvert
User Guide

CEA/EIA-608, CEA/EIA-708 (Embedded)

If your input captions are in any of the following formats, the service handles them as "embedded":

  • CEA-608

  • EIA-608

  • CEA-708

  • EIA-708

Number of Captions Selectors for Embedded Captions

  • If you are doing embedded-to-embedded, create only one captions selector, even if you want to include multiple languages in the output. With this scenario, AWS Elemental MediaConvert automatically extracts all languages and includes them in the output.

  • If you are doing embedded-to-other, create one captions selector for each language that you want to include in the output, up to four selectors.

  • If you are doing embedded-to-embedded in some outputs and embedded-to-other in other outputs, create one captions selector for the embedded-to-embedded, and then create up to four more selectors for the embedded-to-other, one for each language that you want.

Captions Selector Fields for Embedded Captions

Source: Choose Embedded

CC channel number: This field specifies the language to extract. Complete as follows:

  • If you are doing embedded-to-embedded captions (that is, you create only one captions selector for the input embedded captions), AWS Elemental MediaConvert ignores this field, so keep the default value for CC channel number.

  • If you are converting embedded captions to another format, (that is, you create several captions selectors, one for each language), specify the captions channel number from the input that holds the language that you want. To do that, select the channel number from the dropdown list. For example, select 1 to choose CC1.


AWS Elemental MediaConvert doesn't automatically detect which language is in each channel. You can specify that when you set up the output captions, so that AWS Elemental MediaConvert passes the language code metadata for the captions channel into the output for downstream use.