CaptionTracks

IVideoFrame.CaptionTracks 属性

返回视频的闭合字幕集合。只读 ICaptionsCollection。

public ICaptionsCollection CaptionTracks { get; }

示例

示例：

[C#]
using (Presentation pres = new Presentation("video with captions.pptx"))
{
    foreach (IShape shape in pres.Slides[0].Shapes)
    {
        if (!(shape is IVideoFrame videoFrame)) continue;

        foreach (var captionTrack in videoFrame.CaptionTracks)
        {
            // 提取字幕的二进制数据并保存到文件
            System.IO.File.WriteAllBytes(captionTrack.CaptionId + ".vtt", captionTrack.BinaryData);
        }
    }
}

另见

AsIPictureFrame EmbeddedVideo