列出预设 - 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。

列出预设

描述

要获取与当前 AWS 账户关联的所有预设的列表，请向 /2012-09-25/presets 资源发送 GET 请求。

请求

语法

GET /2012-09-25/presets/Ascending=true|false&
                PageToken=value for accessing the next page of 
                results HTTP/1.1 Content-Type: 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

请求参数

此操作接受以下请求参数。Elastic Transcoder 会返回所有可用的预设。

升序

要按提交预设的日期和时间顺序列出预设，请输入 true。要按反向的时间顺序列出预设，请输入 false。

PageToken

当 Elastic Transcoder 返回多个结果页面时，请使用后续 GET 请求中的 PageToken 获取每个连续的结果页面。

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 字符串包含以下对象。

响应

语法

Status: 200 OK
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

{
   "Presets":[
      {
         "Id":"preset ID",
         "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"
         },
      },
      {...},
   ],
   "NextPageToken":value for accessing the next page of results|null
}

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

响应正文中的 JSON 字符串将返回您在创建预设时指定的值。有关各个对象的更多信息，请参阅 您在创建 Elastic Transcoder 预设时指定的设置。

此外，Elastic Transcoder 将返回以下值。

（自动）Id

预设的标识符。您可以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）NextPageToken

用于访问第二页及后续结果页的值（如果有）。当预设适合放在一页上时，或当您已到达结果的最后一页时，NextPageToken 的值为null。

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

GET /2012-09-25/presets HTTP/1.1
Content-Type: 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

示例响应

Status: 200 OK
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

{
   "Presets":[
      {
         "Id":"5555555555555-abcde5",
         "Type":"Custom",
         "Name":"DefaultPreset",
         "Description":"Use for published videos",
         "Container":"mp4",
         "Audio":{
            "BitRate":"96",
            "Channels":"2",
            "Codec":"AAC",
            "CodecOptions":{
               "Profile":"AAC-LC"
            },
            "SampleRate":"44100"
         },
         "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"
         },
      },
      {...}
   ]
}