Supported captions workflows, sidecar input captions - MediaConvert
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Supported captions workflows, sidecar input captions

The following tables show the captions formats you can create in your outputs when your input captions are in a sidecar format. Sidecar captions are captions that you provide as a separate input file from your video.

To see whether MediaConvert supports your captions workflow, go to the table for your video output container. Note that MediaConvert doesn't support every possible file extension for each sidecar format.

Sidecar captions supported in CMAF output container

The following table lists supported output captions formats for this output container, when your input captions are in a sidecar format. Sidecar captions are captions that are in a separate file from your video.

Input captions format

Supported file extensions

Supported output captions formats

IMSC1 text profile

.xml

IMSC (as sidecar .fmp4)

WebVTT

SCC

.scc

IMSC (as sidecar .fmp4)

WebVTT

SMI

.smi

IMSC (as sidecar .fmp4)

WebVTT

SMPTE-TT

.ttml, .xml, .dfxp

IMSC (as sidecar .fmp4)

WebVTT

SRT

.srt

IMSC (as sidecar .fmp4)

WebVTT

EBU STL

.stl

IMSC (as sidecar .fmp4)

WebVTT

TTML

.ttml, .xml, .dfxp

IMSC (as sidecar .fmp4)

WebVTT

WebVTT

.vtt

IMSC (as sidecar .fmp4)

WebVTT

Sidecar captions supported in DASH output container

The following table lists supported output captions formats for this output container, when your input captions are in a sidecar format. Sidecar captions are captions that are in a separate file from your video.

Input captions format

Supported file extensions

Supported output captions formats

IMSC1 text profile

.xml

Burn in

IMSC (as sidecar .fmp4)

IMSC (as sidecar .xml)

TTML (as sidecar .fmp4)

TTML (as sidecar .ttml)

SCC

.scc

Burn in

IMSC (as sidecar .fmp4)

IMSC (as sidecar .xml)

TTML (as sidecar .fmp4)

TTML (as sidecar .ttml)

SMI

.smi

Burn in

IMSC (as sidecar .fmp4)

IMSC (as sidecar .xml)

TTML (as sidecar .fmp4)

TTML (as sidecar .ttml)

SMPTE-TT

.ttml, .xml, .dfxp

Burn in

IMSC (as sidecar .fmp4)

IMSC (as sidecar .xml)

TTML (as sidecar .fmp4)

TTML (as sidecar .ttml)

SRT

.srt

Burn in

IMSC (as sidecar .fmp4)

IMSC (as sidecar .xml)

TTML (as sidecar .fmp4)

TTML (as sidecar .ttml)

EBU STL

.stl

Burn in

IMSC (as sidecar .fmp4)

IMSC (as sidecar .xml)

TTML (as sidecar .fmp4)

TTML (as sidecar .ttml)

TTML

.ttml, .xml, .dfxp

Burn in

IMSC (as sidecar .fmp4)

IMSC (as sidecar .xml)

TTML (as sidecar .fmp4)

TTML (as sidecar .ttml)

WebVTT

.vtt

Burn in

IMSC (as sidecar .fmp4)

IMSC (as sidecar .xml)

TTML (as sidecar .fmp4)

TTML (as sidecar .ttml)

Sidecar captions supported in HLS output container

The following table lists supported output captions formats for this output container, when your input captions are in a sidecar format. Sidecar captions are captions that are in a separate file from your video.

Input captions format

Supported file extensions

Supported output captions formats

IMSC1 text profile

.xml

Burn in

WebVTT

SCC

.scc

Burn in

Embedded

Embedded plus SCTE-20

SCTE-20 plus embedded

WebVTT

SMI

.smi

Burn in

WebVTT

SMPTE-TT

.ttml, .xml, .dfxp

Burn in

WebVTT

SRT

.srt

Burn in

WebVTT

EBU STL

.stl

Burn in

WebVTT

TTML

.ttml, .xml, .dfxp

Burn in

WebVTT

WebVTT

.vtt

Burn in

WebVTT

Sidecar captions supported in Microsoft Smooth Streaming (MSS) output container

The following table lists supported output captions formats for this output container, when your input captions are in a sidecar format. Sidecar captions are captions that are in a separate file from your video.

Input captions format

Supported file extensions

Supported output captions formats

IMSC1 text profile

.xml

Burn in

TTML

SCC

.scc

Burn in

TTML

SMI

.smi

Burn in

TTML

SMPTE-TT

.ttml, .xml, .dfxp

Burn in

TTML

SRT

.srt

Burn in

TTML

EBU STL

.stl

Burn in

TTML

TTML

.ttml, .xml, .dfxp

Burn in

TTML

WebVTT

.vtt

Burn in

TTML

Sidecar captions supported in MP4 output container

The following table lists supported output captions formats for this output container, when your input captions are in a sidecar format. Sidecar captions are captions that are in a separate file from your video.

Input captions format

Supported file extensions

Supported output captions formats

IMSC1 text profile

.xml

Burn in

SCC

.scc

Burn in

Embedded

Embedded plus SCTE-20

SCTE-20 plus embedded

SMI

.smi

Burn in

SMPTE-TT

.ttml, .xml, .dfxp

Burn in

TTML

SRT

.srt

Burn in

EBU STL

.stl

Burn in

TTML

.ttml, .xml, .dfxp

Burn in

WebVTT

.vtt

Burn in

Sidecar captions supported in MPEG2-TS File output container

The following table lists supported output captions formats for this output container, when your input captions are in a sidecar format. Sidecar captions are captions that are in a separate file from your video.

Input captions format

Supported file extensions

Supported output captions formats

IMSC1 text profile

.xml

Burn in

Teletext

DVB-Sub

SCC

.scc

Burn in

DVB-Sub

Embedded

Embedded plus SCTE-20

SCTE-20 plus embedded

Teletext

SMI

.smi

Burn in

DVB-Sub

SMPTE-TT

.ttml, .xml, .dfxp

Burn in

Teletext

DVB-Sub

SRT

.srt

Burn in

Teletext

EBU STL

.stl

Burn in

Teletext

DVB-Sub

TTML

.ttml, .xml, .dfxp

Burn in

Teletext

DVB-Sub

WebVTT

.vtt

Burn in

Teletext

DVB-Sub

Sidecar captions supported in MXF output container

The following table lists supported output captions formats for this output container, when your input captions are in a sidecar format. Sidecar captions are captions that are in a separate file from your video.

Input captions format

Supported file extensions

Supported output captions formats

IMSC1 text profile

.xml

Burn in

Teletext

SCC

.scc

Burn in

Embedded

Embedded plus SCTE-20

SCTE-20 plus embedded

Teletext

SMI

.smi

Burn in

SMPTE-TT

.ttml, .xml, .dfxp

Burn in

SRT

.srt

Burn in

Teletext

EBU STL

.stl

Burn in

Teletext

TTML

.ttml, .xml, .dfxp

Burn in

Teletext

WebVTT

.vtt

Burn in

Teletext

Sidecar captions supported in QuickTime output container

The following table lists supported output captions formats for this output container, when your input captions are in a sidecar format. Sidecar captions are captions that are in a separate file from your video.

Input captions format

Supported file extensions

Supported output captions formats

IMSC1 text profile

.xml

Burn in

SCC

.scc

Burn in

Embedded

Embedded plus SCTE-20

SCTE-20 plus embedded

SMI

.smi

Burn in

SMPTE-TT

.ttml, .xml, .dfxp

Burn in

SRT

.srt

Burn in

EBU STL

.stl

Burn in

TTML

.ttml, .xml, .dfxp

Burn in

WebVTT

.vtt

Burn in

Sidecar captions supported with File output groups

The following table lists standalone sidecar output captions formats that MediaConvert supports with outputs in the File output group. Sidecar captions are captions that are in a separate file from your video.

When you set up these output captions in your job, choose No container (RAW) for Container, under Output settings. In your JSON job specification, specify it this way:

{ "ContainerSettings": { "Container": "RAW" },
Note

You can create sidecar captions outputs only as part of a job that also generates a video output.

Input captions format

Supported file extensions

Supported output captions formats

IMSC1 text profile

.xml

IMSC (as sidecar .xml)

IMSC

SRT

SMI

TTML

WebVTT

SCC

.scc

IMSC (as sidecar .xml)

SCC

SRT

SMI

TTML

WebVTT

SMI

.smi

IMSC (as sidecar .xml)

SRT

SMI

TTML

WebVTT

SMPTE-TT

.ttml, .xml, .dfxp

IMSC (as sidecar .xml)

SRT

SMI

TTML

WebVTT

SRT

.srt

IMSC (as sidecar .xml)

IMSC

SRT

SMI

TTML

WebVTT

EBU STL

.stl

IMSC (as sidecar .xml)

SRT

SMI

TTML

WebVTT

TTML

.ttml, .xml, .dfxp

IMSC (as sidecar .xml)

SRT

SMI

TTML

WebVTT

WebVTT

.vtt

IMSC (as sidecar .xml)

SRT

SMI

TTML

WebVTT