ffmpeg的应用

Question

C#环境用dos 命令去执行视频转换怎样才能动态的监视转换的进度呢？望高手赐教！

Answer 1

试一试  private void execthread() {
            Process nprocess = new Process();
            float duration = 0.00F, current = 0.00F;            nprocess.StartInfo.FileName = Path.Combine(Application.StartupPath, "ffmpeg.exe");
            nprocess.StartInfo.Arguments = @"-i ""C:\myfile.mpg"" -ar 22050 -ab 32 -f flv -s 320×240 -aspect 4:3 -y somemove.flv";
            nprocess.EnableRaisingEvents = false;
            nprocess.StartInfo.UseShellExecute = false;
            nprocess.StartInfo.CreateNoWindow = true;
            nprocess.StartInfo.RedirectStandardOutput = true;
            nprocess.StartInfo.RedirectStandardError = true;
            nprocess.Start();
            StreamReader d = nprocess.StandardError;
            do {
                string s = d.ReadLine();
                if (s.Contains("Duration: ")) {
                    string stime = functions.ExtractDuration(s);
                    duration = functions.TotalStringToSeconds(stime);
                    synchTotal(duration.ToString());
                } else {
                    if (s.Contains("frame=")) {
                        string currents = functions.ExtractTime(s);
                        current = functions.CurrentStringToSeconds(currents);
                        synchCurrent(current.ToString());
                        synchTextOutput(s);
                    }
                }
            } while (!d.EndOfStream);            nprocess.WaitForExit();
            nprocess.Close();
        }
参考:
http://www.hoogervorst.ca/arthur/?p=2009

Answer 2

网上有专门的ffmpeg的参数解释.如需要可以传你两份..http://user.qzone.qq.com/20888602/infocenter?ptlang=2052http://user.qzone.qq.com/20888602/infocenter?ptlang=2052