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azure-media-services - Azure 媒体服务 - v3 覆盖位置问题

问题描述

我正在研究一种将叠加图像添加到视频的编码流程。我希望这个水印在右下角。无论我尝试使用位置参数，水印都位于左上角。

有人可以指出一个涵盖该场景的示例吗？Microsoft 文档和示例对定位叠加层和设置不透明度含糊不清。

这是包含我的转换定义的代码片段。无论覆盖设置如何，我都可以为矩形位置元素使用任何值，并且没有任何变化。水印最终出现在视频的右上角。它就像位置和不透明度属性被忽略了。

 new AMSModels.TransformOutput(
            new AMSModels.StandardEncoderPreset(
                 filters: new AMSModels.Filters
                        {
                            Overlays = new List<AMSModels.Overlay>
                            {
                                new AMSModels.VideoOverlay()
                                {
                                    InputLabel =  "tbvvideooverlay",
                                    Opacity = .5,
                                    Position = new AMSModels.Rectangle(){ Left = "100", Top = "100", Width = "100", Height = "100"} //**I've tried all types of values here including percentages, nothing changes when I reencode the video.**


                                }
                            }
                        },
                codecs: new AMSModels.Codec[]
                {
                    // Add an AAC Audio layer for the audio encoding
                    new AMSModels.AacAudio(
                        channels: 2,
                        samplingRate: 48000,
                        bitrate: 128000,
                        profile: AMSModels.AacAudioProfile.AacLc
                    ),
                    // Next, add a H264Video for the video encoding
                   new AMSModels.H264Video (
                        // Set the GOP interval to 2 seconds for all H264Layers
                        keyFrameInterval:TimeSpan.FromSeconds(2),
                         // Add H264Layers. Assign a label that you can use for the output filename
                        layers:  new AMSModels.H264Layer[]
                        {
                            new AMSModels.H264Layer (
                                bitrate: 3600000, // Units are in bits per second and not kbps or Mbps - 3.6 Mbps or 3,600 kbps
                                width: "1280",
                                height: "720",
                                label: "3600" // This label is used to modify the file name in the output formats
                            ),
                            new AMSModels.H264Layer (
                                bitrate: 1600000, // Units are in bits per second and not kbps or Mbps - 1.6 Mbps or 1600 kbps
                                width: "960",
                                height: "540",
                                label: "1600" // This label is used to modify the file name in the output formats
                            ),
                            new AMSModels.H264Layer (
                                bitrate: 600000, // Units are in bits per second and not kbps or Mbps - 0.6 Mbps or 600 kbps
                                width: "640",
                                height: "360",
                                label: "600" // This label is used to modify the file name in the output formats
                            ),
                        }
                    ),
                    // Also generate a set of PNG thumbnails
                    new AMSModels.PngImage(
                        start: "10%",
                        step: "10%",
                        range: "90%",
                        layers: new Microsoft.Azure.Management.Media.Models.PngLayer[]{
                            new AMSModels.PngLayer(
                                width: "100%",
                                height: "100%"
                            )
                        }
                    ),
                    new AMSModels.JpgImage(
                        start: "10%",
                        step: "10%",
                        range: "90%",
                        layers: new Microsoft.Azure.Management.Media.Models.JpgLayer[]{
                            new AMSModels.JpgLayer(
                                quality: 100,
                                width: "100%",
                                height: "100%"
                            )
                        }
                    )
                },
                // Specify the format for the output files - one for video+audio, and another for the thumbnails
                formats: new AMSModels.Format[]
                {
                    // Mux the H.264 video and AAC audio into MP4 files, using basename, label, bitrate and extension macros
                    // Note that since you have multiple H264Layers defined above, you have to use a macro that produces unique names per H264Layer
                    // Either {Label} or {Bitrate} should suffice
                     
                    new AMSModels.Mp4Format(
                        filenamePattern:"{Basename}_{Resolution}_{Bitrate}{Extension}"
                    ),
                    new AMSModels.PngFormat(
                        filenamePattern:"Thumbnail-{Basename}-{Index}{Extension}"
                    ),

                      new AMSModels.JpgFormat(
                        filenamePattern:"Thumbnail-{Basename}-{Index}{Extension}"
                    )
                }
            ),
            onError: AMSModels.OnErrorType.StopProcessingJob,
            relativePriority: AMSModels.Priority.Normal
        )
        };

            string description = "A simple custom encoding transform with 2 MP4 bitrates";
            // Create the custom Transform with the outputs defined above
            transform = await client.Transforms.CreateOrUpdateAsync(resourceGroupName, accountName, transformName, outputs, description);
        }

谢谢！

标签： azure-media-services

解决方案

非常感谢您发现并指出这一问题。我们对此进行了查看并确认确实存在您在这里发现的错误！首先，感谢您发现这个问题并报告它。

现在是坏消息，现在我们将不得不考虑修复它并将修复程序重新部署到生产环境中。这对我们来说可能需要一些时间，所以如果您需要一个快速的解决方案，我唯一可以建议的是使用较旧的 v2 API（是的，我们宣布弃用的那个）来解决这个问题，直到我们可以将代码修复到生产中。

如果适合您，这是在 v2 中执行此操作的旧方法 - https://docs.microsoft.com/en-us/azure/media-services/previous/media-services-advanced-encoding-with-mes#覆盖

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