Creating input captions selectors
When you set up captions, you begin by creating captions selectors. Captions selectors identify a particular captions asset on the input and associate a label with it. The captions asset is either a single track or the set of all tracks contained in the input file, depending on your input captions format. For example, you might add Captions selector 1 and associate the French captions with it. When you set up an output to include captions, you do so by specifying captions selectors.
To create input captions selectors
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On the Create job page, in the Job pane on the left, choose an input.
Note In jobs with multiple inputs, each input must have the same number of captions selectors. For inputs that don't have captions, create empty captions selectors. For these selectors, for Source, choose Null source. Remove all captions selectors if no inputs have captions.
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In the Captions selectors section, near the bottom of the page, choose Add captions selector.
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Under Source, choose the input captions format.
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For most formats, more fields appear. Specify the values for these fields as described in the topic that relates to your input captions format. Choose the appropriate topic from the list that follows this procedure.
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Create more captions selectors as necessary. The number of captions selectors that you need depends on your input captions format. Choose the appropriate topic from the list that follows this procedure.
Detailed information by input captions format
- QuickTime captions track or captions in MXF VANC data (ancillary) input captions
- Embedded (CEA/EIA-608, CEA/EIA-708), embedded+SCTE-20, and SCTE-20+embedded input captions
- DVB-Sub input captions
- Teletext input captions
- IMSC, SCC, SMPTE-TT, SRT, STL, TTML (sidecar) input captions
- IMSC input captions (as part of an IMF source)
- WebVTT input captions (as part of an HLS source)