创建预设 - Amazon Elastic Transcoder
描述请求响应错误示例

通过以下方式节省成本并获得更多功能 AWS Elemental MediaConvert

MediaConvert 是一项较新的基于文件的视频转码服务，它提供了一套全面的高级转码功能，按需费率起价为每分钟 0.0075 美元。阅读更多。

已经在使用 Amazon Elastic Transcoder？ 迁移到很简单 MediaConvert。有关更多信息，请参阅本概述，其中包含有关迁移过程的重要信息以及指向其他资源的链接。

本文属于机器翻译版本。若本译文内容与英语原文存在差异，则一律以英文原文为准。

创建预设

描述

要创建预设，请向 /2012-09-25/presets 资源发送 POST 请求。

重要

Elastic Transcoder 将检查您指定的设置，以确保设置符合 Elastic Transcoder 要求并确定设置是否符合适用标准。如果您的设置对于 Elastic Transcoder 无效，则 Elastic Transcoder 将返回 HTTP 400 响应 (ValidationException)，并且不会创建预设。如果设置对于 Elastic Transcoder 有效但未严格符合标准，则 Elastic Transcoder 将创建预设并在响应中返回一条警告消息。这有助于您确定设置是否符合标准，同时针对 Elastic Transcoder 生成的文件为您提供更高的灵活性。

注意

Elastic Transcoder 包含几个用于常见输出格式的系统预设。有关更多信息，请参阅主题 创建任务 中的 PresetId。

请求

语法

POST /2012-09-25/presets HTTP/1.1
Content-Type: application/json; charset=UTF-8
Accept: */*
Host: elastictranscoder.Elastic Transcoder endpoint.amazonaws.com:443
x-amz-date: 20130114T174952Z
Authorization: AWS4-HMAC-SHA256 
               Credential=AccessKeyID/request-date/Elastic Transcoder endpoint/elastictranscoder/aws4_request,
               SignedHeaders=host;x-amz-date;x-amz-target,
               Signature=calculated-signature
Content-Length: number of characters in the JSON string
{
   "Name":"preset name",
   "Description":"preset description",
   "Container":"flac|flv|fmp4|gif|mp2|mp3|mp4|mpg|mxf|oga|ogg|ts|wav|webm",
   "Audio":{
      "Codec":"AAC|flac|mp2|mp3|pcm|vorbis",
      "CodecOptions":{
          "Profile":"auto|AAC-LC|HE-AAC|HE-AACv2",
          "BitDepth":"8|16|24|32",
          "Signed":"Signed|Unsigned",
          "BitOrder":"LittleEndian"
      },
      "SampleRate":"auto|22050|32000|44100|48000|96000",
      "BitRate":"audio bit rate of output file in kilobits/second",
      "Channels":"auto|0|1|2",
      "AudioPackingMode":"SingleTrack|OneChannelPerTrack|
          OneChannelPerTrackWithMosTo8Tracks"
   },
   "Video":{
      "Codec":"gif|H.264|mpeg2|vp8|vp9",
      "CodecOptions":{
         "Profile":"baseline|main|high|0|1|2|3",
         "Level":"1|1b|1.1|1.2|1.3|2|2.1|2.2|3|3.1|3.2|4|4.1",
         "MaxReferenceFrames":"maximum number of reference frames",
         "MaxBitRate":"maximum bit rate",
         "BufferSize":"maximum buffer size",
         "InterlacedMode":"Progressive|TopFirst|BottomFirst|Auto",
         "ColorSpaceConversion":"None|Bt709ToBt601|Bt601ToBt709|Auto",
         "ChromaSubsampling":"yuv420p|yuv422p",
         "LoopCount":"Infinite|[0,100]"
      },
      "KeyframesMaxDist":"maximum frames between key frames",
      "FixedGOP":"true|false",
      "BitRate":"auto|video bit rate of output file in kilobits/second",
      "FrameRate":"auto|10|15|23.97|24|25|29.97|30|50|60",
      "MaxFrameRate":"10|15|23.97|24|25|29.97|30|50|60",
      "MaxWidth":"auto|[128,4096]",
      "MaxHeight":"auto|[96,3072]",
      "SizingPolicy":"Fit|Fill|Stretch|Keep|ShrinkToFit|ShrinkToFill",
      "PaddingPolicy":"Pad|NoPad",
      "DisplayAspectRatio":"auto|1:1|4:3|3:2|16:9",
      "Resolution":"auto|width in pixelsxheight in pixels" <not recommended>,
      "AspectRatio":"auto|1:1|4:3|3:2|16:9" <not recommended>,
      "Watermarks":[
         {
            "Id":"unique identifier up to 40 characters",
            "MaxWidth":"[16,Video:MaxWidth]px|[0,100]%",
            "MaxHeight":"[16,Video:MaxHeight]px|[0,100]%", 
            "SizingPolicy":"Fit|Stretch|ShrinkToFit",
            "HorizontalAlign":"Left|Right|Center",
            "HorizontalOffset":"[0,100]%|[0,Video:MaxWidth]px",
            "VerticalAlign":"Top|Bottom|Center",
            "VerticalOffset":"[0,100]%|[0,Video:MaxHeight]px",
            "Opacity":"[0,100]",
            "Target":"Content|Frame"
         },
         {...}
      ]
   },
   "Thumbnails":{
      "Format":"jpg|png",
      "Interval":"number of seconds between thumbnails",
      "MaxWidth":"auto|[32,4096]",
      "MaxHeight":"auto|[32,3072]",
      "SizingPolicy":"Fit|Fill|Stretch|Keep|ShrinkToFit|ShrinkToFill",
      "PaddingPolicy":"Pad|NoPad",
      "Resolution":"width in pixelsxheight in pixels" <not recommended>,
      "AspectRatio":"auto|1:1|4:3|3:2|16:9" <not recommended>
   }
}

请求参数

此操作不使用请求参数。

请求标头

此操作仅使用所有操作通用的请求标头。有关通用请求标头的信息，请参阅 HTTP 标头内容。

请求正文

请求正文中的 JSON 字符串包含 CreatePreset 操作的输入对象。有关输入对象的更多信息，请参阅 您在创建 Elastic Transcoder 预设时指定的设置。

响应

语法

Status: 201 Created
x-amzn-RequestId: c321ec43-378e-11e2-8e4c-4d5b971203e9
Content-Type: application/json
Content-Length: number of characters in the response
Date: Mon, 14 Jan 2013 06:01:47 GMT
{
   "Preset":{
      "Id":"Id for the new preset",
      "Type":"Custom|System",
      "Name":"preset name",
      "Description":"preset description",
      "Container":"flac|flv|fmp4|gif|mp2|mp3|mp4|mpg|mxf|oga|ogg|ts|wav|webm",
      "Audio":{
         "Codec":"AAC|flac|mp2|mp3|pcm|vorbis",
         "CodecOptions":{
            "Profile":"auto|AAC-LC|HE-AAC|HE-AACv2",
            "BitDepth":"8|16|24|32",
            "Signed":"Signed|Unsigned",
            "BitOrder":"LittleEndian"
         },
         "SampleRate":"auto|22050|32000|44100|48000|96000",
         "BitRate":"audio bit rate of output file in kilobits/second",
         "Channels":"auto|0|1|2",
         "AudioPackingMode":"SingleTrack|OneChannelPerTrack|
            OneChannelPerTrackWithMosTo8Tracks"
      },
      "Video":{
         "Codec":"gif|H.264|mpeg2|vp8|vp9",
         "CodecOptions":{
            "Profile":"baseline|main|high|0|1|2|3",
            "Level":"1|1b|1.1|1.2|1.3|2|2.1|2.2|3|3.1|3.2|4|4.1",
            "MaxReferenceFrames":maximum number of reference frames,
            "MaxBitRate":"maximum bit rate",
            "BufferSize":"maximum buffer size",
            "InterlacedMode":"Progressive|TopFirst|BottomFirst|Auto",
            "ColorSpaceConversionMode":"None|Bt709ToBt601|Bt601ToBt709|Auto",
            "ChromaSubsampling":"yuv420p|yuv422p",
            "LoopCount":"Infinite|[0,100]"
         },
         "KeyframesMaxDist":maximum frames between key frames,
         "FixedGOP":"true|false",
         "BitRate":"auto|video bit rate of output file in kilobits/second",
         "FrameRate":"auto|10|15|23.97|24|25|29.97|30|50|60",
         "MaxFrameRate":"10|15|23.97|24|25|29.97|30|50|60",
         "MaxWidth":"auto|[128,4096]",
         "MaxHeight":"auto|[96,3072]",
         "SizingPolicy":"Fit|Fill|Stretch|Keep|ShrinkToFit|ShrinkToFill",
         "PaddingPolicy":"Pad|NoPad",
         "DisplayAspectRatio":"auto|1:1|4:3|3:2|16:9",
         "Resolution":"width in pixelsxheight in pixels" <not recommended>,
         "AspectRatio":"auto|1:1|4:3|3:2|16:9" <not recommended>
         "Watermarks":[
            {
               "Id":"unique identifier up to 40 characters",
               "MaxWidth":"[16,Video:MaxWidth]px|[0,100]%",
               "MaxHeight":"[16,Video:MaxHeight]px|[0,100]%", 
               "SizingPolicy":"Fit|Stretch|ShrinkToFit",
               "HorizontalAlign":"Left|Right|Center",
               "HorizontalOffset":"[0,100]%|[0,Video:MaxWidth]px",
               "VerticalAlign":"Top|Bottom|Center",
               "VerticalOffset":"[0,100]%|[0,Video:MaxHeight]px",
               "Opacity":"[0,100]",
               "Target":"Content|Frame"
            }
         ]
      },   
      "Thumbnails":{
         "Format":"jpg|png",
         "Interval":"number of seconds between thumbnails",
         "MaxWidth":"auto|[32,4096]",
         "MaxHeight":"auto|[32,3072]",
         "SizingPolicy":"Fit|Fill|Stretch|Keep|ShrinkToFit|ShrinkToFill",
         "PaddingPolicy":"Pad|NoPad",
         "Resolution":"width in pixelsxheight in pixels",
         "AspectRatio":"auto|1:1|4:3|3:2|16:9"
      }
   },
   "Warning":"message about codec compatibility"
}

响应标头

此操作仅使用大多数响应通用的响应标头。有关通用响应标头的信息，请参阅 HTTP 响应。

响应正文

创建任务时，Elastic Transcoder 将返回在请求中指定的值。有关更多信息，请参见 请求正文。

此外，Elastic Transcoder 将返回以下值。

（自动）Id

新预设的标识符。您使用该值获取预设的设置或将其删除。

（自动）Type

该预设是 Elastic Transcoder (System) 提供的默认预设还是您定义的预设 (Custom)。

（自动）Warning

当预设的设置不符合编解码器的标准，但这些设置可能产生可接受的输出时，Elastic Transcoder 会创建预设并包含一条警告，说明预设设置为何不兼容。

错误

有关 Elastic Transcoder 异常和错误消息的信息，请参阅 处理 Elastic Transcoder 中的错误。

示例

以下示例请求将创建一个名为 DefaultPreset 的预设。

示例请求

POST /2012-09-25/presets HTTP/1.1
Content-Type: application/json; charset=UTF-8
Accept: */*
Host: elastictranscoder.Elastic Transcoder endpoint.amazonaws.com:443
x-amz-date: 20130114T174952Z
Authorization: AWS4-HMAC-SHA256 
               Credential=AccessKeyID/request-date/Elastic Transcoder endpoint/elastictranscoder/aws4_request,
               SignedHeaders=host;x-amz-date;x-amz-target,
               Signature=calculated-signature
Content-Length: number of characters in the JSON string
{
   "Name":"DefaultPreset",
   "Description":"Use for published videos",
   "Container":"mp4",
   "Audio":{
      "Codec":"AAC",
      "CodecOptions":{
         "Profile":"AAC-LC"
      },
      "SampleRate":"44100",
      "BitRate":"96",
      "Channels":"2"
   },
   "Video":{
      "Codec":"H.264",
      "CodecOptions":{
         "Profile":"main",
         "Level":"2.2",
         "MaxReferenceFrames":"3",
         "MaxBitRate":"",
         "BufferSize":"",
         "InterlacedMode":"Progressive",
         "ColorSpaceConversionMode":"None"
      },
      "KeyframesMaxDist":"240",
      "FixedGOP":"false",
      "BitRate":"1600",
      "FrameRate":"auto",
      "MaxFrameRate":"30",
      "MaxWidth":"auto",
      "MaxHeight":"auto",
      "SizingPolicy":"Fit",
      "PaddingPolicy":"Pad",
      "DisplayAspectRatio":"auto",
      "Watermarks":[
         {
            "Id":"company logo",
            "MaxWidth":"20%",
            "MaxHeight":"20%", 
            "SizingPolicy":"ShrinkToFit",
            "HorizontalAlign":"Right",
            "HorizontalOffset":"10px",
            "VerticalAlign":"Bottom",
            "VerticalOffset":"10px",
            "Opacity":"55.5",
            "Target":"Content"
         }
      ]
   },
   "Thumbnails":{
      "Format":"png",
      "Interval":"120",
      "MaxWidth":"auto",
      "MaxHeight":"auto",
      "SizingPolicy":"Fit",
      "PaddingPolicy":"Pad"
   }
}

示例响应

Status: 201 Created
x-amzn-RequestId: c321ec43-378e-11e2-8e4c-4d5b971203e9
Content-Type: application/json
Content-Length: number of characters in the response
Date: Mon, 14 Jan 2013 06:01:47 GMT

{
   "Preset":{
      "Id":"5555555555555-abcde5",
      "Type":"Custom",
      "Name":"DefaultPreset",
      "Description":"Use for published videos",
      "Container":"mp4",
      "Audio":{
         "Codec":"AAC",
         "CodecOptions":{
            "Profile":"AAC-LC"
         },
         "SampleRate":"44100",
         "BitRate":"96",
         "Channels":"2"
      },
      "Video":{
         "Codec":"H.264",
         "CodecOptions":{
            "Profile":"main",
            "Level":"2.2",
            "MaxReferenceFrames":"3",
            "MaxBitRate":"",
            "BufferSize":"",
            "InterlacedMode":"Progressive",
            "ColorSpaceConversionMode":"None|Bt709ToBt601|Bt601ToBt709|Auto"
         },
         "KeyframesMaxDist":"240",
         "FixedGOP":"false",
         "BitRate":"1600",
         "FrameRate":"auto",
         "MaxFrameRate":"30",
         "MaxWidth":"auto",
         "MaxHeight":"auto",
         "SizingPolicy":"Fit",
         "PaddingPolicy":"Pad",
         "DisplayAspectRatio":"auto",
         "Watermarks":[
            {
               "Id":"company logo",
               "MaxWidth":"20%",
               "MaxHeight":"20%", 
               "SizingPolicy":"ShrinkToFit",
               "HorizontalAlign":"Right",
               "HorizontalOffset":"10px",
               "VerticalAlign":"Bottom",
               "VerticalOffset":"10px",
               "Opacity":"55.5",
               "Target":"Content"
            }
         ]
      },
      "Thumbnails":{
         "Format":"png",
         "Interval":"120",
         "MaxWidth":"auto",
         "MaxHeight":"auto",
         "SizingPolicy":"Fit",
         "PaddingPolicy":"Pad"
      }
   },
   "Warning":""
}