C#使用ffmpeg產生Mp4檔案
ffmpeg是專門處理影音串流協定的程式，可以用來處理Rtsp協定或Rtmp協定。
這篇文章介紹如何在C#執行外部的ffmpeg.exe帶參數對串流協定來產生MP4檔案。
RTMP協定
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| private static string ffmpegPath = @".\ffmpeg\bin\ffmpeg.exe";
//開始轉檔
public static void StartRecordMp4FromRtmp(string recordServer, string directoryPath, string saveRecordPath, ref Process process)
{
try
{
if (!File.Exists(directoryPath))
{
Directory.CreateDirectory(directoryPath);
}
if (string.IsNullOrEmpty(recordServer))
{
LogUtil.logger.Warn("Method:ImageUtil.StartRecordMp4 recordServer is null");
}
if (string.IsNullOrEmpty(saveRecordPath))
{
LogUtil.logger.Warn("Method:ImageUtil.StartRecordMp4 saveRecordPath is null");
}
if (process == null)
{
process = new Process();
process.StartInfo.FileName = "cmd.exe";
process.StartInfo.UseShellExecute = false;
process.StartInfo.CreateNoWindow = true;
process.StartInfo.RedirectStandardOutput = true;
process.StartInfo.RedirectStandardInput = true;
process.Start();
}
var cmdParams = ffmpegCompletePath + string.Format(" -i {0} -f mp4 -c:v copy -c:a copy {1}", recordServer, saveRecordPath);
process.StandardInput.WriteLine(cmdParams);
}
catch (Exception ex)
{
MessageBox.Show(Convert.ToString(ex));
LogUtil.logger.Fatal(Convert.ToString(ex));
}
}
//結束轉檔
public static void StopRecordMp4(ref Process process)
{
if (process == null)
{
LogUtil.logger.Warn("Method:ImageUtil.StartRecordMp4 process is null");
return;
}
process.StandardInput.WriteLine("q");
process.StandardInput.WriteLine("exit");
process.Close();
process.Dispose();
process = null;
}
|
RTSP協定
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| private static string ffmpegPath = @".\ffmpeg\bin\ffmpeg.exe";
//開始轉檔
public static void StartRecordMp4FromRtsp(string recordServer, string directoryPath, string saveRecordPath, ref Process process)
{
try
{
if (!File.Exists(directoryPath))
{
Directory.CreateDirectory(directoryPath);
}
if (string.IsNullOrEmpty(recordServer))
{
LogUtil.logger.Warn("Method:ImageUtil.StartRecordMp4 recordServer is null");
}
if (string.IsNullOrEmpty(saveRecordPath))
{
LogUtil.logger.Warn("Method:ImageUtil.StartRecordMp4 saveRecordPath is null");
}
if (process == null)
{
process = new Process();
process.StartInfo.FileName = "cmd.exe";
process.StartInfo.UseShellExecute = false;
process.StartInfo.CreateNoWindow = true;
process.StartInfo.RedirectStandardOutput = true;
process.StartInfo.RedirectStandardInput = true;
process.Start();
}
//RTSP來源必須是H.264格式
var cmdParams = ffmpegCompletePath + string.Format(" -rtsp_transport tcp -i {0} -f mp4 -c:v copy -c:a copy -aspect 16:9 -movflags +faststart {1}", recordServer, saveRecordPath);
process.StandardInput.WriteLine(cmdParams);
}
catch (Exception ex)
{
MessageBox.Show(Convert.ToString(ex));
LogUtil.logger.Fatal(Convert.ToString(ex));
}
}
//結束轉檔
public static void StopRecordMp4(ref Process process)
{
if (process == null)
{
LogUtil.logger.Warn("Method:ImageUtil.StartRecordMp4 process is null");
return;
}
//q指令下了之後，通常要等幾秒mp4的結尾才會寫入!
//才可以對該mp4檔案操作，不然會發生檔案損毀0xc00d36c4錯誤。
process.StandardInput.WriteLine("q");
process.StandardInput.WriteLine("exit");
process.Close();
process.Dispose();
process = null;
}
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