AWS Elemental MediaConvert是Amazon Web Services (AWS)提供的一个基于云的视频处理服务。它可以帮助用户在云中对视频进行转码、套餐、水印、广告插入等处理，同时也支持自适应比特率转码、HDR转换、字幕嵌入等功能。本文将为大家介绍如何使用AWS SDK for .NET创建MediaConvert作业并进行视频转码。

首先，我们需要安装AWS SDK for .NET。在Visual Studio中新建.NET控制台应用程序，然后在NuGet包管理器中搜索并安装AWSSDK.MediaConvert和AWSSDK.Core。接下来，在程序中添加AWS命名空间：

using Amazon.MediaConvert; using Amazon.MediaConvert.Model;

接着，我们需要创建AmazonMediaConvertClient：

var client = new AmazonMediaConvertClient();

然后，创建一个CreateJobRequest对象并设置它的属性：

var jobRequest = new CreateJobRequest() { Role = "MediaConvert_Default_Role", Settings = new JobSettings() { Outputs = new List

() { new Output() { AudioDescriptions = new List() { new AudioDescription() { AudioTypeControl = AudioTypeControl.FOLLOW_INPUT, Bitrate = 192000, LanguageCodeControl = AudioLanguageCodeControl.FOLLOW_INPUT, CodecSettings = new AudioCodecSettings() { Codec = AudioCodec.AAC, AacSettings = new AacSettings() { AudioDescriptionBroadcasterMix = AudioDescriptionBroadcasterMix.NORMAL, Bitrate = 192000, RateControlMode = AacRateControlMode.CBR } } } }, ContainerSettings = new ContainerSettings() { Container = ContainerType.MP4, Mp4Settings = new Mp4Settings() { CslgAtom = Mp4CslgAtom.INCLUDE, FreeSpaceBox = Mp4FreeSpaceBox.EXCLUDE, MoovPlacement = Mp4MoovPlacement.NORMAL } }, VideoDescription = new VideoDescription() { AfdSignaling = AfdSignaling.NONE, Height = 480, Width = 854, ScalingBehavior = ScalingBehavior.DEFAULT, TimecodeInsertion = VideoTimecodeInsertion.DISABLED, CodecSettings = new VideoCodecSettings() { Codec = VideoCodec.H_264, H264