AWS::MediaLive::Channel H264Settings - Amazon CloudFormation
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AWS::MediaLive::Channel H264Settings

The settings for the H.264 codec in the output.

The parent of this entity is VideoCodecSettings.

Syntax

To declare this entity in your Amazon CloudFormation template, use the following syntax:

JSON

{ "AdaptiveQuantization" : String, "AfdSignaling" : String, "Bitrate" : Integer, "BufFillPct" : Integer, "BufSize" : Integer, "ColorMetadata" : String, "ColorSpaceSettings" : H264ColorSpaceSettings, "EntropyEncoding" : String, "FilterSettings" : H264FilterSettings, "FixedAfd" : String, "FlickerAq" : String, "ForceFieldPictures" : String, "FramerateControl" : String, "FramerateDenominator" : Integer, "FramerateNumerator" : Integer, "GopBReference" : String, "GopClosedCadence" : Integer, "GopNumBFrames" : Integer, "GopSize" : Double, "GopSizeUnits" : String, "Level" : String, "LookAheadRateControl" : String, "MaxBitrate" : Integer, "MinIInterval" : Integer, "NumRefFrames" : Integer, "ParControl" : String, "ParDenominator" : Integer, "ParNumerator" : Integer, "Profile" : String, "QualityLevel" : String, "QvbrQualityLevel" : Integer, "RateControlMode" : String, "ScanType" : String, "SceneChangeDetect" : String, "Slices" : Integer, "Softness" : Integer, "SpatialAq" : String, "SubgopLength" : String, "Syntax" : String, "TemporalAq" : String, "TimecodeInsertion" : String }

YAML

AdaptiveQuantization: String AfdSignaling: String Bitrate: Integer BufFillPct: Integer BufSize: Integer ColorMetadata: String ColorSpaceSettings: H264ColorSpaceSettings EntropyEncoding: String FilterSettings: H264FilterSettings FixedAfd: String FlickerAq: String ForceFieldPictures: String FramerateControl: String FramerateDenominator: Integer FramerateNumerator: Integer GopBReference: String GopClosedCadence: Integer GopNumBFrames: Integer GopSize: Double GopSizeUnits: String Level: String LookAheadRateControl: String MaxBitrate: Integer MinIInterval: Integer NumRefFrames: Integer ParControl: String ParDenominator: Integer ParNumerator: Integer Profile: String QualityLevel: String QvbrQualityLevel: Integer RateControlMode: String ScanType: String SceneChangeDetect: String Slices: Integer Softness: Integer SpatialAq: String SubgopLength: String Syntax: String TemporalAq: String TimecodeInsertion: String

Properties

AdaptiveQuantization

The adaptive quantization. This allows intra-frame quantizers to vary to improve visual quality.

Required: No

Type: String

Update requires: No interruption

AfdSignaling

Indicates that AFD values will be written into the output stream. If afdSignaling is auto, the system tries to preserve the input AFD value (in cases where multiple AFD values are valid). If set to fixed, the AFD value is the value configured in the fixedAfd parameter.

Required: No

Type: String

Update requires: No interruption

Bitrate

The average bitrate in bits/second. This is required when the rate control mode is VBR or CBR. It isn't used for QVBR. In a Microsoft Smooth output group, each output must have a unique value when its bitrate is rounded down to the nearest multiple of 1000.

Required: No

Type: Integer

Update requires: No interruption

BufFillPct

The percentage of the buffer that should initially be filled (HRD buffer model).

Required: No

Type: Integer

Update requires: No interruption

BufSize

The size of the buffer (HRD buffer model) in bits/second.

Required: No

Type: Integer

Update requires: No interruption

ColorMetadata

Includes color space metadata in the output.

Required: No

Type: String

Update requires: No interruption

ColorSpaceSettings

Settings to configure the color space handling for the video.

Required: No

Type: H264ColorSpaceSettings

Update requires: No interruption

EntropyEncoding

The entropy encoding mode. Use cabac (must be in Main or High profile) or cavlc.

Required: No

Type: String

Update requires: No interruption

FilterSettings

Optional filters that you can apply to an encode.

Required: No

Type: H264FilterSettings

Update requires: No interruption

FixedAfd

A four-bit AFD value to write on all frames of video in the output stream. Valid only when afdSignaling is set to Fixed.

Required: No

Type: String

Update requires: No interruption

FlickerAq

If set to enabled, adjusts the quantization within each frame to reduce flicker or pop on I-frames.

Required: No

Type: String

Update requires: No interruption

ForceFieldPictures

This setting applies only when scan type is "interlaced." It controls whether coding is performed on a field basis or on a frame basis. (When the video is progressive, the coding is always performed on a frame basis.) enabled: Force MediaLive to code on a field basis, so that odd and even sets of fields are coded separately. disabled: Code the two sets of fields separately (on a field basis) or together (on a frame basis using PAFF), depending on what is most appropriate for the content.

Required: No

Type: String

Update requires: No interruption

FramerateControl

Indicates how the output video frame rate is specified. If you select "specified," the output video frame rate is determined by framerateNumerator and framerateDenominator. If you select "initializeFromSource," the output video frame rate is set equal to the input video frame rate of the first input.

Required: No

Type: String

Update requires: No interruption

FramerateDenominator

The frame rate denominator.

Required: No

Type: Integer

Update requires: No interruption

FramerateNumerator

The frame rate numerator. The frame rate is a fraction, for example, 24000/1001 = 23.976 fps.

Required: No

Type: Integer

Update requires: No interruption

GopBReference

If enabled, uses reference B frames for GOP structures that have B frames > 1.

Required: No

Type: String

Update requires: No interruption

GopClosedCadence

The frequency of closed GOPs. In streaming applications, we recommend that you set this to 1 so that a decoder joining mid-stream will receive an IDR frame as quickly as possible. Setting this value to 0 will break output segmenting.

Required: No

Type: Integer

Update requires: No interruption

GopNumBFrames

The number of B-frames between reference frames.

Required: No

Type: Integer

Update requires: No interruption

GopSize

The GOP size (keyframe interval) in units of either frames or seconds per gopSizeUnits. The value must be greater than zero.

Required: No

Type: Double

Update requires: No interruption

GopSizeUnits

Indicates if the gopSize is specified in frames or seconds. If seconds, the system converts the gopSize into a frame count at runtime.

Required: No

Type: String

Update requires: No interruption

Level

The H.264 level.

Required: No

Type: String

Update requires: No interruption

LookAheadRateControl

The amount of lookahead. A value of low can decrease latency and memory usage, while high can produce better quality for certain content.

Required: No

Type: String

Update requires: No interruption

MaxBitrate

For QVBR: See the tooltip for Quality level. For VBR: Set the maximum bitrate in order to accommodate expected spikes in the complexity of the video.

Required: No

Type: Integer

Update requires: No interruption

MinIInterval

Meaningful only if sceneChangeDetect is set to enabled. This setting enforces separation between repeated (cadence) I-frames and I-frames inserted by Scene Change Detection. If a scene change I-frame is within I-interval frames of a cadence I-frame, the GOP is shrunk or stretched to the scene change I-frame. GOP stretch requires enabling lookahead as well as setting the I-interval. The normal cadence resumes for the next GOP. Note that the maximum GOP stretch = GOP size + Min-I-interval - 1.

Required: No

Type: Integer

Update requires: No interruption

NumRefFrames

The number of reference frames to use. The encoder might use more than requested if you use B-frames or interlaced encoding.

Required: No

Type: Integer

Update requires: No interruption

ParControl

Indicates how the output pixel aspect ratio is specified. If "specified" is selected, the output video pixel aspect ratio is determined by parNumerator and parDenominator. If "initializeFromSource" is selected, the output pixels aspect ratio will be set equal to the input video pixel aspect ratio of the first input.

Required: No

Type: String

Update requires: No interruption

ParDenominator

The Pixel Aspect Ratio denominator.

Required: No

Type: Integer

Update requires: No interruption

ParNumerator

The Pixel Aspect Ratio numerator.

Required: No

Type: Integer

Update requires: No interruption

Profile

An H.264 profile.

Required: No

Type: String

Update requires: No interruption

QualityLevel

Leave as STANDARD_QUALITY or choose a different value (which might result in additional costs to run the channel). - ENHANCED_QUALITY: Produces a slightly better video quality without an increase in the bitrate. Has an effect only when the Rate control mode is QVBR or CBR. If this channel is in a MediaLive multiplex, the value must be ENHANCED_QUALITY. - STANDARD_QUALITY: Valid for any Rate control mode.

Required: No

Type: String

Update requires: No interruption

QvbrQualityLevel

Controls the target quality for the video encode. This applies only when the rate control mode is QVBR. Set values for the QVBR quality level field and Max bitrate field that suit your most important viewing devices. Recommended values are: - Primary screen: Quality level: 8 to 10. Max bitrate: 4M - PC or tablet: Quality level: 7. Max bitrate: 1.5M to 3M - Smartphone: Quality level: 6. Max bitrate: 1M to 1.5M.

Required: No

Type: Integer

Update requires: No interruption

RateControlMode

The rate control mode. QVBR: The quality will match the specified quality level except when it is constrained by the maximum bitrate. We recommend this if you or your viewers pay for bandwidth. VBR: The quality and bitrate vary, depending on the video complexity. We recommend this instead of QVBR if you want to maintain a specific average bitrate over the duration of the channel. CBR: The quality varies, depending on the video complexity. We recommend this only if you distribute your assets to devices that can't handle variable bitrates.

Required: No

Type: String

Update requires: No interruption

ScanType

Sets the scan type of the output to progressive or top-field-first interlaced.

Required: No

Type: String

Update requires: No interruption

SceneChangeDetect

The scene change detection. On: inserts I-frames when the scene change is detected. Off: does not force an I-frame when the scene change is detected.

Required: No

Type: String

Update requires: No interruption

Slices

The number of slices per picture. The number must be less than or equal to the number of macroblock rows for progressive pictures, and less than or equal to half the number of macroblock rows for interlaced pictures. This field is optional. If you don't specify a value, MediaLive chooses the number of slices based on the encode resolution.

Required: No

Type: Integer

Update requires: No interruption

Softness

Softness. Selects a quantizer matrix. Larger values reduce high-frequency content in the encoded image.

Required: No

Type: Integer

Update requires: No interruption

SpatialAq

If set to enabled, adjusts quantization within each frame based on the spatial variation of content complexity.

Required: No

Type: String

Update requires: No interruption

SubgopLength

If set to fixed, uses gopNumBFrames B-frames per sub-GOP. If set to dynamic, optimizes the number of B-frames used for each sub-GOP to improve visual quality.

Required: No

Type: String

Update requires: No interruption

Syntax

Produces a bitstream that is compliant with SMPTE RP-2027.

Required: No

Type: String

Update requires: No interruption

TemporalAq

If set to enabled, adjusts quantization within each frame based on the temporal variation of content complexity.

Required: No

Type: String

Update requires: No interruption

TimecodeInsertion

Determines how timecodes should be inserted into the video elementary stream. disabled: don't include timecodes. picTimingSei: pass through picture timing SEI messages from the source specified in Timecode Config.

Required: No

Type: String

Update requires: No interruption