General information about supported formats
The following table shows the supported formats, specifies whether they are supported in inputs or outputs, and specifies the standard that defines each format.
| Caption | Supported in input | Supported in output | Description |
|---|---|---|---|
| Ancillary data | Yes |
Data that is compliant with “SMPTE 291M: Ancillary Data Package and Space Formatting” and that is contained in ancillary data. |
|
| ARIB | Yes | Yes |
Captions that are compliant with ARIB STD-B37 Version 2.4. |
| Burn-in | Yes |
From input: It is technically impossible for the encoder to read burn-in captions. Therefore, from an input viewpoint, they can't be considered to be captions. For output: Burn-in captions are captions that are converted into text and then overlaid on top of the picture directly in the video stream. |
|
| DVB-Sub | Yes | Yes |
Captions that are compliant with ETSI EN 300 743. |
|
EBU-TT-D |
Yes |
Captions that are compliant with EBU Tech 3380, EBU-TT-D Subtitling Distribution Format, 2018. |
|
| Embedded | Yes | Yes |
In most containers: Captions that are compliant with the EIA-608 standard (also known as CEA-608 or “line 21 captions”) or the CEA-708 standard (also known as EIA-708). In a Link input container: Captions carried as ancillary captions that are compliant with SMPTE 334. The ancillary captions are compliant with EIA-608 standard (also known as CEA-608 or “line 21 captions”) or CEA-708 standard (also known as EIA-708). |
| Embedded+SCTE-20 | Yes | Yes |
Captions that have both embedded and SCTE-20 in the video. The embedded captions are inserted before the SCTE-20 captions. |
| RTMP CaptionInfo | Yes | Captions that are compliant with the Adobe onCaptionInfo format. | |
| SCTE-20 | Yes | Captions that are compliant with the standard “SCTE 20 2012 Methods for Carriage of CEA-608 Closed Captions and Non-Real Time Sampled Video.” | |
| SCTE-20+Embedded | Yes | Captions that are compliant with SCTE-43. The SCTE-20 captions are inserted in the video before the embedded captions. | |
| SCTE-27 | Yes | Captions that are compliant with the standard “SCTE-27 (2011), Subtitling Methods for Broadcast Cable.” | |
| SMPTE-TT | Yes | Captions that are compliant with the standard "SMPTE ST 2052-1:2010" | |
| Teletext | Yes | Yes | From TS input: Captions in the EBU Teletext
format. From a CDI input or in a Link container: Captions in OP47 teletext format, also known as SMPTE RDD-08 (compliant with ITU-R BT.1120-7). |
| TTML | Yes | Captions files that are compliant with the standard “Timed Text Markup Language 1 (TTML1) (Second Edition).” | |
| WebVTT | Yes | Captions that are compliant with “webvtt: The Web
Video Text Tracks Format” (http://dev.w3.org/html5/webvtt/ |
