C#处理Android Audio and Video

Video Converter for .NET (C#) FFMpeg wrapper

http://www.nrecosite.com/video_converter_net.aspx

 

Document: http://www.nrecosite.com/doc/NReco.VideoConverter/

 

Nuget: https://www.nuget.org/packages/NReco.VideoConverter/

Install-Package NReco.VideoConverter

 

获取MP3声音长度

http://stackoverflow.com/questions/13722501/easiest-way-to-get-mp3-duration-and-size

方法1: 通过NAudio

Mp3FileReader reader = new Mp3FileReader("filename.mp3");

TimeSpan duration = reader.TotalTime;

方法2: 通过Shell32 DLL

public class Mp3Service

    {

        /// <summary>

        /// 根据mp3文件的绝对路径和属性名称获得属性值

        /// </summary>

        /// <param name="filePath"></param>

        /// <param name="attributeName">如：播放时间、文件大小、比特率</param>

        /// <returns></returns>

        public static string GetFileAttribute(string filePath, string attributeName)

        {

            //TagLib.File file = new AudioFile(filePath);



            string attributeVal = "";

            List<string> fileInfoArr = GetMp3FileDetailInfo(filePath);

            if (System.Web.HttpContext.Current != null)

            {

                System.Web.HttpContext.Current.Trace.Write("AuduioFileInfo", JsonConvert.SerializeObject(fileInfoArr));

            }

            switch (attributeName)

            {

                case "播放时间":

                    if (fileInfoArr.Count > 28)

                        attributeVal = fileInfoArr[28];

                    break;

                case "文件大小":

                    if (fileInfoArr.Count > 2)

                        attributeVal = fileInfoArr[2];

                    break;

                case "比特率":

                    if (fileInfoArr.Count > 29)

                        attributeVal = fileInfoArr[29];

                    break;



            }

            return attributeVal;

        }



        /// <summary>

        /// 获得mp3文件的详细信息

        /// </summary>

        /// <param name="strPath"></param>

        /// <returns></returns>

        public static List<string> GetMp3FileDetailInfo(string strPath)

        {

            List<string> fileInfoArr = new List<string>();



            Shell32.Shell sh = new Shell32.Shell();

            Folder dir = sh.NameSpace(Path.GetDirectoryName(strPath));

            FolderItem item = dir.ParseName(Path.GetFileName(strPath));

            for (int i = -1; i < 50; i++)

            {

                // 0检索项的名称。

                // 1检索项的大小。

                // 2检索条目的类型。

                // 3检索项最后修改日期和时间。

                // 4检索项的属性。

                // -1项检索信息提示信息。

                fileInfoArr.Add(dir.GetDetailsOf(item, i));

            }

            return fileInfoArr;

        }

    }