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Directory : /usr/local/aws-cli/v2/2.22.17/dist/awscli/examples/medialive/

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Current File : /usr/local/aws-cli/v2/2.22.17/dist/awscli/examples/medialive/create-channel.rst

**To create a channel**

The following ``create-channel`` example creates a channel by passing in a JSON file that contains the parameters that you want to specify.

The channel in this example ingests an HLS PULL input that connects to a source that contains video, audio, and embedded captions. The channel creates one HLS output group with an Akamai server as the destination. The output group contains two outputs: one for the H.265 video and AAC audio, and one for the Web-VTT captions, in English only.

The JSON for this example channel includes the minimum required parameters for a channel that uses an HLS PULL input and that produces an HLS output group with Akamai as the destination. The JSON contains these main sections: 

* ``InputAttachments``, which specifies one source for the audio, and one source for the captions. It does not specify a video selector, which means that MediaLive extracts the first video it finds in the source.
* ``Destinations``, which contains the two IP addresses (URLs) for the single output group in this channel. These addresses require passwords.
* ``EncoderSettings``, which contains subsections.

  * ``AudioDescriptions``, which specifies that the channel contains one audio output asset, which uses the source from InputAttachments, and produces audio in AAC format. 
  * ``CaptionDescriptions``, which specifies that the channel contains one captions output asset, which uses the source from InputAttachments, and produces captions in Web-VTT format.
  * ``VideoDescriptions``, which specifies that the channel contains one video output asset, with the specified resolution.
  * ``OutputGroups``, which specifies the output groups. In this example there is one group named ``Akamai``. The connection is made using HLS PUT. The output group contains two outputs. One output is for the video asset (named ``Video_high``) and the audio asset (named ``Audio_EN``). One output is for the captions asset (named ``WebVTT_EN``). 

In this example, some of the parameters contain no value or contain nested empty parameters. For example, OutputSettings for the ``Video_and_audio`` output contains several nested parameters that end at an empty parameter M3u8Settings. This parameter must be included, but you can omit one, several, or all its children, which means that the child will take its default value or be null. 

All the parameters that apply to this example channel but that aren't specified in this file will either take the default value, be set to null, or take a unique value generated by MediaLive. ::

    aws medialive create-channel \
        --cli-input-json file://channel-in-hls-out-hls-akamai.json

Contents of ``channel-in-hls-out-hls-akamai.json``::

    {
        "Name": "News_West",
        "RoleArn": "arn:aws:iam::111122223333:role/MediaLiveAccessRole",
        "InputAttachments": [
            {
                "InputAttachmentName": "local_news",
                "InputId": "1234567",
                "InputSettings": {
                    "AudioSelectors": [
                        {
                            "Name": "English-Audio",
                            "SelectorSettings": {
                                "AudioLanguageSelection": {
                                    "LanguageCode": "EN"
                                }
                            }
                        }
                    ],
                    "CaptionSelectors": [
                        {
                            "LanguageCode": "ENE",
                            "Name": "English_embedded"
                        }
                    ]
                }
            }
        ],
        "Destinations": [
            {
                "Id": "akamai-server-west",
                "Settings": [
                    {
                        "PasswordParam": "/medialive/examplecorp1",
                        "Url": "http://203.0.113.55/news/news_west",
                        "Username": "examplecorp"
                    },
                    {
                        "PasswordParam": "/medialive/examplecorp2",
                        "Url": "http://203.0.113.82/news/news_west",
                        "Username": "examplecorp"
                    }
                ]
            }
        ],
        "EncoderSettings": {
            "AudioDescriptions": [
                {
                    "AudioSelectorName": "English-Audio",
                    "CodecSettings": {
                        "AacSettings": {}
                    },
                    "Name": "Audio_EN"
                }
            ],
            "CaptionDescriptions": [
                {
                    "CaptionSelectorName": "English_embedded",
                    "DestinationSettings": {
                        "WebvttDestinationSettings": {}
                    },
                    "Name": "WebVTT_EN"
                }
            ],
            "VideoDescriptions": [
                {
                    "Height": 720,
                    "Name": "Video_high",
                    "Width": 1280
                }
            ],
            "OutputGroups": [
                {
                    "Name": "Akamai",
                    "OutputGroupSettings": {
                        "HlsGroupSettings": {
                            "Destination": {
                                "DestinationRefId": "akamai-server-west"
                            },
                            "HlsCdnSettings": {
                                "HlsBasicPutSettings": {}
                            }
                        }
                    },
                    "Outputs": [
                        {
                            "AudioDescriptionNames": [
                                "Audio_EN"
                            ],
                            "OutputName": "Video_and_audio",
                            "OutputSettings": {
                                "HlsOutputSettings": {
                                    "HlsSettings": {
                                        "StandardHlsSettings": {
                                            "M3u8Settings": {}
                                        }
                                    },
                                    "NameModifier": "_1"
                                }
                            },
                            "VideoDescriptionName": "Video_high"
                        },
                        {
                            "CaptionDescriptionNames": [
                                "WebVTT_EN"
                            ],
                            "OutputName": "Captions-WebVTT",
                            "OutputSettings": {
                                "HlsOutputSettings": {
                                    "HlsSettings": {
                                        "StandardHlsSettings": {
                                            "M3u8Settings": {}
                                        }
                                    },
                                    "NameModifier": "_2"
                                }
                            }
                        }
                    ]
                }
            ],
            "TimecodeConfig": {
                "Source": "EMBEDDED"
            }
        }
    }

**Output:**

The output repeats back the contents of the JSON file, plus the following values. All parameters are ordered alphabetically.

* ``ARN`` for the channel. The last part of the ARN is the unique channel ID.
* ``EgressEndpoints`` is blank in this example channel because it used only for PUSH inputs. When it applies it  shows the addresses on MediaLive that content is pushed to.
* ``OutputGroups``, ``Outputs``. These show all the parameters for the output group and outputs, including those that you didn't include but that are relevant to this channel. The parameters might be empty (perhaps indicating the parameter or feature is disabled in this channel configuration) or might show the default value that will apply.
* ``LogLevel`` is set to the default (DISABLED).
* ``Tags`` is set to the default (null).
* ``PipelinesRunningCount`` and ``State`` show the current status of the channel.

For more information, see `Creating a Channel from Scratch <https://docs.aws.amazon.com/medialive/latest/ug/creating-channel-scratch.html>`__ in the *AWS Elemental MediaLive User Guide*.

Youez - 2016 - github.com/yon3zu
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