视频处理（Media Processing Service，MPS）是针对海量多媒体数据，提供的云端转码和音视频处理服务。您可以编写云函数来处理 MPS 中的回调信息，通过接收相关回调帮助转储、投递和处理视频任务中的相关事件与后续内容。
MPS 触发器具有以下特点：
Push 模型：MPS 触发器会监听视频处理的回调信息，并通过单次触发的方式将事件数据推送至 SCF 函数。
异步调用：MSP 触发器始终使用异步调用类型来调用函数，结果不会返回给调用方。有关调用类型的更多信息，请参见 调用类型。
MPS 触发器属性
事件类型：MPS 触发器以账号维度的事件类型推送 Event 事件，目前支持工作流任务（WorkflowTask）和视频编辑任务（EditMediaTask）两种事件类型触发。
事件处理：MPS 触发器以服务维度产生的事件作为事件源，不区分地域、资源等属性。每个账号全地域只能创建一个 MPS 触发器。如需多个函数并行处理任务，请参见 函数间调用 SDK。
MPS 触发器的事件消息结构
在指定的 MPS 触发器接收到消息时，事件结构与字段以 WorkflowTask 为例，示例如下：
{"EventType":"WorkflowTask","WorkflowTaskEvent":{"TaskId":"245****654-WorkflowTask-f46dac7fe2436c47******d71946986t0","Status":"FINISH","ErrCode":0,"Message":"","InputInfo":{"Type":"COS","CosInputInfo":{"Bucket":"macgzptest-125****654","Region":"ap-guangzhou","Object":"/dianping2.mp4"}},"MetaData":{"AudioDuration":11.261677742004395,"AudioStreamSet":[{"Bitrate":127771,"Codec":"aac","SamplingRate":44100}],"Bitrate":2681468,"Container":"mov,mp4,m4a,3gp,3g2,mj2","Duration":11.261677742004395,"Height":720,"Rotate":90,"Size":3539987,"VideoDuration":10.510889053344727,"VideoStreamSet":[{"Bitrate":2553697,"Codec":"h264","Fps":29,"Height":720,"Width":1280}],"Width":1280},"MediaProcessResultSet":[{"Type":"Transcode","TranscodeTask":{"Status":"SUCCESS","ErrCode":0,"Message":"SUCCESS","Input":{"Definition":10,"WatermarkSet":[{"Definition":515247,"TextContent":"","SvgContent":""}],"OutputStorage":{"Type":"COS","CosOutputStorage":{"Bucket":"gztest-125****654","Region":"ap-guangzhou"}},"OutputObjectPath":"/dasda/dianping2_transcode_10","SegmentObjectName":"/dasda/dianping2_transcode_10_{number}","ObjectNumberFormat":{"InitialValue":0,"Increment":1,"MinLength":1,"PlaceHolder":"0"}},"Output":{"OutputStorage":{"Type":"COS","CosOutputStorage":{"Bucket":"gztest-125****654","Region":"ap-guangzhou"}},"Path":"/dasda/dianping2_transcode_10.mp4","Definition":10,"Bitrate":293022,"Height":320,"Width":180,"Size":401637,"Duration":11.26200008392334,"Container":"mov,mp4,m4a,3gp,3g2,mj2","Md5":"31dcf904c03d0cd78346a12c25c0acc9","VideoStreamSet":[{"Bitrate":244608,"Codec":"h264","Fps":24,"Height":320,"Width":180}],"AudioStreamSet":[{"Bitrate":48414,"Codec":"aac","SamplingRate":44100}]}},"AnimatedGraphicTask":null,"SnapshotByTimeOffsetTask":null,"SampleSnapshotTask":null,"ImageSpriteTask":null},{"Type":"AnimatedGraphics","TranscodeTask":null,"AnimatedGraphicTask":{"Status":"FAIL","ErrCode":30010,"Message":"TencentVodPlatErr Or Unkown","Input":{"Definition":20000,"StartTimeOffset":0,"EndTimeOffset":600,"OutputStorage":{"Type":"COS","CosOutputStorage":{"Bucket":"gztest-125****654","Region":"ap-guangzhou"}},"OutputObjectPath":"/dasda/dianping2_animatedGraphic_20000"},"Output":null},"SnapshotByTimeOffsetTask":null,"SampleSnapshotTask":null,"ImageSpriteTask":null},{"Type":"SnapshotByTimeOffset","TranscodeTask":null,"AnimatedGraphicTask":null,"SnapshotByTimeOffsetTask":{"Status":"SUCCESS","ErrCode":0,"Message":"SUCCESS","Input":{"Definition":10,"TimeOffsetSet":[],"WatermarkSet":[{"Definition":515247,"TextContent":"","SvgContent":""}],"OutputStorage":{"Type":"COS","CosOutputStorage":{"Bucket":"gztest-125****654","Region":"ap-guangzhou"}},"OutputObjectPath":"/dasda/dianping2_snapshotByOffset_10_{number}","ObjectNumberFormat":{"InitialValue":0,"Increment":1,"MinLength":1,"PlaceHolder":"0"}},"Output":{"Storage":{"Type":"COS","CosOutputStorage":{"Bucket":"gztest-125****654","Region":"ap-guangzhou"}},"Definition":0,"PicInfoSet":[{"TimeOffset":0,"Path":"/dasda/dianping2_snapshotByOffset_10_0.jpg","WaterMarkDefinition":[515247]}]}},"SampleSnapshotTask":null,"ImageSpriteTask":null},{"Type":"ImageSprites","TranscodeTask":null,"AnimatedGraphicTask":null,"SnapshotByTimeOffsetTask":null,"SampleSnapshotTask":null,"ImageSpriteTask":{"Status":"SUCCESS","ErrCode":0,"Message":"SUCCESS","Input":{"Definition":10,"OutputStorage":{"Type":"COS","CosOutputStorage":{"Bucket":"gztest-125****654","Region":"ap-guangzhou"}},"OutputObjectPath":"/dasda/dianping2_imageSprite_10_{number}","WebVttObjectName":"/dasda/dianping2_imageSprite_10","ObjectNumberFormat":{"InitialValue":0,"Increment":1,"MinLength":1,"PlaceHolder":"0"}},"Output":{"Storage":{"Type":"COS","CosOutputStorage":{"Bucket":"gztest-125****654","Region":"ap-guangzhou"}},"Definition":10,"Height":80,"Width":142,"TotalCount":2,"ImagePathSet":["/dasda/imageSprite/dianping2_imageSprite_10_0.jpg"],"WebVttPath":"/dasda/imageSprite/dianping2_imageSprite_10.vtt"}}}]}}
WorkflowTask 事件
WorkflowTask 事件消息体详细字段如下：
{"EventType":"WorkflowTask","WorkflowTaskEvent":{// WorkflowTaskEvent 字段}}
WorkflowTask 数据结构及字段内容详细说明：
名称 | 类型 | 描述 |
TaskId | String | 视频处理任务 ID。 |
Status | String | 任务流状态，取值如下： PROCESSING：处理中。 FINISH：已完成。 |
ErrCode | Integer | 已弃用，请使用各个具体任务的 ErrCode。 |
Message | String | 已弃用，请使用各个具体任务的 Message。 |
InputInfo | 视频处理的目标文件信息。注意：此字段可能返回 null，表示取不到有效值。 | |
MetaData | 原始视频的元信息。注意：此字段可能返回 null，表示取不到有效值。 | |
MediaProcessResultSet | Array of MediaProcessTaskResult | 视频处理任务的执行状态与结果。 |
AiContentReviewResultSet | Array of AiContentReviewResult | 视频内容审核任务的执行状态与结果。 |
AiAnalysisResultSet | Array of AiAnalysisResult | 视频内容分析任务的执行状态与结果。 |
AiRecognitionResultSet | Array of AiRecognitionResult | 视频内容识别任务的执行状态与结果。 |
EditMediaTask 事件
EditMediaTask 事件消息体详细字段如下：
{"EventType":"EditMediaTask","EditMediaTaskEvent":{// EditMediaTask 字段}}
EditMediaTask 数据结构及字段内容详细说明：
名称 | 类型 | 描述 |
TaskId | String | 任务 ID。 |
Status | String | 任务状态，取值如下： PROCESSING：处理中。 FINISH：已完成。 |
ErrCode | Integer | 错误码0：成功；其他值：失败。 |
Message | String | 错误信息。 |
Input | 视频编辑任务的输入。 | |
Output | 视频编辑任务的输出。注意：此字段可能返回 null，表示取不到有效值。 |
