encoding a signal with auto_return = true

[scunning1987]

Hi Adrian,

I can't tell if this is supposed to be supported or not, but I have a use case where I need to generate a SCTE35 with auto_return = true .

From your code I see various mentions of cmd.break_auto_return, but when I try to encode a SCTE35 (TimeSignal) with this set to True, it seems to be ignored. Please let me know, thanks.

[futzu]

Good to see you man, you doing okay?

I just looked this up about an hour ago for a different issue,

• Auto Returns aren't included in a time signal command only in a Splice Insert.

• You can use a segmentation descriptor with a time signal and set segmentation Duration .

• Auto Returns are to be assumed when there is not an associated Cue to return from a break.

• It is preferred that you use a Cue to indicate the end of a break .**

  Example

• Below is a Cue with a Time Signal and a Segmentation Descriptor with a segmentation type id of 34, Break Start. segmentation_duration sets the length of the break.

• You should return from the break with another Cue with a Segmentation Descriptor with a segmentation type id of 35, Break End and a segmentation duration set to 0.

• If there is not an associated Cue with Time Signal and a Segmentation Desciptor with a segmentation type id of 35,Break End, then the parser should assume an auto-return and return when segmentation_duration expires.

Adrian

{
    "info_section": {
        "table_id": "0xfc",
        "section_syntax_indicator": false,
        "private": false,
        "sap_type": "0x3",
        "sap_details": "No Sap Type",
        "section_length": 64,
        "protocol_version": 0,
        "encrypted_packet": false,
        "encryption_algorithm": 0,
        "pts_adjustment_ticks": 207000,
        "pts_adjustment": 2.3,
        "cw_index": "0x0",
        "tier": "0x0",
        "splice_command_length": 5,
        "splice_command_type": 6,
        "descriptor_loop_length": 42,
        "crc": "0xa6bfc57f"
    },
    "command": {
        "command_length": 5,
        "command_type": 6,
        "name": "Time Signal",
        "time_specified_flag": true,
        "pts_time": 26363.038756,
        "pts_time_ticks": 2372673488
    },
    "descriptors": [
        {
            "tag": 2,
            "descriptor_length": 40,
            "name": "Segmentation Descriptor",
            "identifier": "CUEI",
            "components": [],
            "segmentation_event_id": "0xffffffff",
            "segmentation_event_cancel_indicator": false,
            "program_segmentation_flag": true,
            "segmentation_duration_flag": true,                     <--- set  segmentation_duration_flag
            "delivery_not_restricted_flag": true,
            "segmentation_duration": 1200.0,                        <---set  segmentation_duration
            "segmentation_duration_ticks": 108000000,
            "segmentation_message": "Break Start",    <----- Indicated by segmentation_type_id
            "segmentation_upid_type": 1,
            "segmentation_upid_type_name": "Deprecated",
            "segmentation_upid_length": 20,
            "segmentation_upid": REDACTED",
            "segmentation_type_id": 34,                   <-------- segmentation_type_id of 34 "Break Start
            "segment_num": 1,
            "segments_expected": 0
        }
    ]
}

[scunning1987]

Hi,

All good here, I appreciate the response.

I'll revert to using an End time signal instead of auto_return.

Thanks, Scott