08 December 2022

SMPTE 436m and Teletext parameters

Added new mux mode for closed captions - 436m and teletext parameters.

🚧

Format support

SMPTE 436m mux mode and teletext parameters only available for mxf_op1a output format.

<?xml version="1.0"?>
<query>
    <userid><<id>></userid> <!-- required-->
    <userkey><<key>></userkey> <!-- required-->
    <action>[Action]</action> <!-- required-->
    <source>[SourceFile]</source> <!-- required-->
    <format>
        <output>mxf_op1a</output> <!-- required-->
        <closed_captions>
            <mux_type>436m</mux_type>
            <page>[PageNumber]</page>
            <!-- closed captions params -->
        </closed_captions>
        <!-- Multiple closed captions params may be included in output format -->
        <closed_captions>
            <!-- closed captions params -->
        </closed_captions>
        <teletext>
            <vanc_line_1>[VANCLine1]</vanc_line_1>
            <vanc_line_2>[VANCLine2]</vanc_line_2>
            <vbi_line_1>[VBILine1]</vbi_line_1>
            <vbi_line_2>[VBILine2]</vbi_line_2>
        </teletext>
        <!-- format params -->
    </format></query>
{
    "query": {
        "userid": "<<id>>", // required
        "userkey": "<<key>>", // required
        "action": "[Action]", // required
        "source": "[SourceFile]", // required
        "format": {
            "output": "mxf_op1a", // required
            "closed_captions": [
                {
                    "mux_type": "436m",
                    "page", "[PageNumber]"
                    // closed captions params
                },
                {
                    // closed captions params
                }
            ],
            "teletext": {
                "vanc_line_1": "[VANCLine1]",
                "vanc_line_2": "[VANCLine2]",
                "vbi_line_1": "[VBILine1]",
                "vbi_line_2": "[VBILine2]"
            }
          	// format params
        }
    }
}

Parameter

Description

Allowed Values

Default Value

Closed Captions Params

mux_type

Specify the closed captions mux type.

  • *timed-text** — Closed Captions would be muxed in video as 3GPP Timed Text track.

  • *cea-608 **— Closed Captions would be muxed in video as cea-608 track.

  • *cea-708** — 608 closed captions would be up-converted to 708 closed captions. And both, cea-608 and cea-708 closed captions, would be muxed in video stream.

  • *webvtt** — webvtt file would be uploaded to same destination as result file (for HLS it would be segmented). Not available for advanced_mss output format.

  • *burn-in** – SRT video subtitle burn-in.

  • *ismt** – Closed Captions would be muxed in video as ismt track. Available only for advanced_dash and advanced_mss output formats.

  • *436m** – SMPTE 436m muxed VBI data.

none

page

Set ttxt page value

Positive integer number

none

Teletext Parameters

vanc_line_1

VANC Line 1 value for teletext ancillary data

Positive integer number

12

vanc_line_2

VANC Line 2 value for teletext ancillary data

Positive integer number

575

vbi_line_1

VBI Line 1 value for teletext ancillary data

Positive integer number

21

vbi_line_2

VBI Line 2 value for teletext ancillary data

Positive integer number

334