我使用以下REST调用对上传的视频进行编码，
POST https://wamsbayclus001rest-hs.cloudapp.net/api/Jobs HTTP/1.1
DataServiceVersion: 1.0;NetFx
MaxDataServiceVersion: 3.0;NetFx
Content-Type: application/json
Accept: application/json;odata=verbose
Accept-Charset: UTF-8
Authorization: Bearer http%3a%2f%2fschemas.xmlsoap.org%2fws%2f2005%2f05%2fidentity%2fclaims%2fnameidentifier=amstestaccount001&urn%3aSubscriptionId=z7f09258-2233-4ca2-b1ae-193798e2c9d8&http%3a%2f%2fschemas.microsoft.com%2faccesscontrolservice%2f2010%2f07%2fclaims%2fidentityprovider=https%3a%2f%2fwamsprodglobal001acs.accesscontrol.windows.net%2f&Audience=urn%3aWindowsAzureMediaServices&ExpiresOn=1421675491&Issuer=https%3a%2f%2fwamsprodglobal001acs.accesscontrol.windows.net%2f&HMACSHA256=9hUudHYnATpi5hN3cvTfgw%2bL4N3tL0fdsRnQnm6ZYIU%3d
x-ms-version: 2.8
Host: wamsbayclus001rest-hs.cloudapp.net
Content-Length: 482
{
"Name":"NewTestJob",
"InputMediaAssets":[
{
"__metadata":{
"uri":"https://wamsbayclus001rest-hs.net/api/Assets('nb%3Acid%3AUUID%3A9bc8ff20-24fb-4fdb-9d7c-b04c7ee573a1')"
}
}
],
"Tasks":[
{
"Configuration":"H264 Adaptive Bitrate MP4 Set 720p",
"MediaProcessorId":"nb:mpid:UUID:1b1da727-93ae-4e46-a8a1-268828765609",
"TaskBody":"<?xml version=\"1.0\" encoding=\"utf-8\"?><taskBody><inputAsset>JobInputAsset(0)</inputAsset>
<outputAsset>JobOutputAsset(0)</outputAsset></taskBody>"
}
]
}
但是H264自适应比特率的内置编码格式是 - H264自适应比特率MP4设置720p，H264自适应比特率MP4设置1080p，H264自适应比特率MP4 SD 16 * 9，H264自适应比特率MP4设置SD 4 * 3，这4个格式将上传的视频编码为各种输出格式，这导致更大的编码数据并花费更多时间来完成单个编码任务。因此，我尝试将上传的视频文件编码为较低分辨率格式，以降低成本和时间。有没有办法实现它？
答案 0 :(得分：3)
好的，所以这有点hackish，但希望它会让你知道你需要为你的工作提供什么样的配置。
我启动Azure Media Services Explorer并在运行fiddler并使用提供的编码预设xml文件之一时创建了一个编码作业。这是POST的主体：
<?xml version="1.0" encoding="utf-8"?>
<entry xmlns="http://www.w3.org/2005/Atom" xmlns:d="http://schemas.microsoft.com/ado/2007/08/dataservices" xmlns:m="http://schemas.microsoft.com/ado/2007/08/dataservices/metadata" xmlns:georss="http://www.georss.org/georss" xmlns:gml="http://www.opengis.net/gml">
<id />
<title />
<updated>2015-08-12T20:46:59Z</updated>
<author>
<name />
</author>
<content type="application/xml">
<m:properties>
<d:Configuration>
<?xml version="1.0" encoding="utf-16"?><!--Created for Azure Media Encoder, July 30 2014 -->
<Presets>
<Preset Version="5.0">
<Job />
<MediaFile DeinterlaceMode="AutoPixelAdaptive" ResizeQuality="Super" AudioGainLevel="1" VideoResizeMode="Stretch">
<Metadata MergeCollection="True">
<Item Name="WM/EncodedBy" Value="Azure Media Encoder 4 - H264 Adaptive Bitrate MP4 Set 720p, 07/30/2014 " />
</Metadata>
<OutputFormat>
<MP4OutputFormat StreamCompatibility="Standard">
<VideoProfile>
<MainH264VideoProfile BFrameCount="3" EntropyMode="Cabac" RDOptimizationMode="Speed" HadamardTransform="False" SubBlockMotionSearchMode="Speed" MultiReferenceMotionSearchMode="Balanced" ReferenceBFrames="False" AdaptiveBFrames="False" SceneChangeDetector="False" FastIntraDecisions="False" FastInterDecisions="False" SubPixelMode="Quarter" SliceCount="0" KeyFrameDistance="00:00:02" InLoopFilter="True" MEPartitionLevel="EightByEight" ReferenceFrames="4" SearchRange="64" AutoFit="True" Force16Pixels="False" FrameRate="0" SeparateFilesPerStream="True" SmoothStreaming="False" NumberOfEncoderThreads="0">
<Streams AutoSize="False" FreezeSort="False">
<StreamInfo Size="1280, 720">
<Bitrate>
<ConstantBitrate Bitrate="3400" IsTwoPass="False" BufferWindow="00:00:05" />
</Bitrate>
</StreamInfo>
<StreamInfo Size="960, 540">
<Bitrate>
<ConstantBitrate Bitrate="2250" IsTwoPass="False" BufferWindow="00:00:05" />
</Bitrate>
</StreamInfo>
<StreamInfo Size="960, 540">
<Bitrate>
<ConstantBitrate Bitrate="1500" IsTwoPass="False" BufferWindow="00:00:05" />
</Bitrate>
</StreamInfo>
<StreamInfo Size="640, 360">
<Bitrate>
<ConstantBitrate Bitrate="1000" IsTwoPass="False" BufferWindow="00:00:05" />
</Bitrate>
</StreamInfo>
<StreamInfo Size="640, 360">
<Bitrate>
<ConstantBitrate Bitrate="650" IsTwoPass="False" BufferWindow="00:00:05" />
</Bitrate>
</StreamInfo>
<StreamInfo Size="320, 180">
<Bitrate>
<ConstantBitrate Bitrate="400" IsTwoPass="False" BufferWindow="00:00:05" />
</Bitrate>
</StreamInfo>
</Streams>
</MainH264VideoProfile>
</VideoProfile>
<AudioProfile>
<AacAudioProfile Codec="AAC" Channels="2" BitsPerSample="16" SamplesPerSecond="44100">
<Bitrate>
<ConstantBitrate Bitrate="96" IsTwoPass="False" BufferWindow="00:00:00" />
</Bitrate>
</AacAudioProfile>
</AudioProfile>
</MP4OutputFormat>
</OutputFormat>
</MediaFile>
</Preset>
<Preset Version="5.0">
<Job />
<MediaFile AudioGainLevel="1">
<Metadata MergeCollection="True">
<Item Name="WM/EncodedBy" Value="Azure Media Encoder 3 - H264 Adaptive Bitrate MP4 Set 720p, 07/30/2014 " />
</Metadata>
<OutputFormat>
<MP4OutputFormat StreamCompatibility="Standard">
<AudioProfile>
<AacAudioProfile Codec="AAC" Channels="2" BitsPerSample="16" SamplesPerSecond="44100">
<Bitrate>
<ConstantBitrate Bitrate="96" IsTwoPass="False" BufferWindow="00:00:00" />
</Bitrate>
</AacAudioProfile>
</AudioProfile>
</MP4OutputFormat>
</OutputFormat>
</MediaFile>
</Preset>
<Preset Version="5.0">
<Job />
<MediaFile AudioGainLevel="1">
<Metadata MergeCollection="True">
<Item Name="WM/EncodedBy" Value="Azure Media Encoder 3 - H264 Adaptive Bitrate MP4 Set 720p, 07/30/2014 " />
</Metadata>
<OutputFormat>
<MP4OutputFormat StreamCompatibility="Standard">
<AudioProfile>
<AacAudioProfile Codec="AAC" Channels="2" BitsPerSample="16" SamplesPerSecond="44100">
<Bitrate>
<ConstantBitrate Bitrate="56" IsTwoPass="False" BufferWindow="00:00:00" />
</Bitrate>
</AacAudioProfile>
</AudioProfile>
</MP4OutputFormat>
</OutputFormat>
</MediaFile>
</Preset>
</Presets>
</d:Configuration>
<d:EncryptionKeyId m:null="true" />
<d:EncryptionScheme m:null="true" />
<d:EncryptionVersion m:null="true" />
<d:EndTime m:null="true" />
<d:ErrorDetails />
<d:HistoricalEvents />
<d:Id></d:Id>
<d:InitializationVector m:null="true" />
<d:MediaProcessorId>nb:mpid:UUID:1b1da727-93ae-4e46-a8a1-268828765609</d:MediaProcessorId>
<d:Name>AME (adv) Encoding of Jenkins_Under_Two_Min.mp4 with Azure Media Encoder v4.7</d:Name>
<d:Options m:type="Edm.Int32">0</d:Options>
<d:PerfMessage m:null="true" />
<d:Priority m:type="Edm.Int32">0</d:Priority>
<d:Progress m:type="Edm.Double">0</d:Progress>
<d:RunningDuration m:type="Edm.Double">0</d:RunningDuration>
<d:StartTime m:null="true" />
<d:State m:type="Edm.Int32">0</d:State>
<d:TaskBody><?xml version="1.0" encoding="utf-16"?>
<taskBody>
<inputAsset>JobInputAsset(0)</inputAsset>
<outputAsset assetCreationOptions="0" assetName="Jenkins_Under_Two_Min.mp4-AME (adv) encoded" storageAccountName="ianphil">JobOutputAsset(0)</outputAsset>
</taskBody></d:TaskBody>
</m:properties>
</content>
</entry>
“配置”部分包含您可以找到的预设中的XML here on GitHub。希望这会引导您在POST中提供您需要的确切配置来创建您的工作。