u3d图片转视频

c#代码：
//将截图生成视频
public static void createVideo()
{

    ProcessStartInfo psi = new ProcessStartInfo();
    psi.FileName = "/bin/sh";
    psi.UseShellExecute = false;
    psi.RedirectStandardOutput = true;
    psi.Arguments = Application.dataPath + "/engine/video.sh " + imagesPath;

    Process p = Process.Start(psi);
    string strOutput = p.StandardOutput.ReadToEnd();
    p.WaitForExit();

    UnityEngine.Debug.Log("调外部shell结束" + strOutput);
}

执行ffmpge的shell脚本：

其中，$1为传递的参数

/usr/local/bin/ffmpeg -framerate 30 -i $1%03d.png -c:v libx264 -r 30 -pix_fmt yuv420p -vf 'scale=trunc(iw/2)*2:trunc(ih/2)*2' -preset veryslow -t 60000 $1video.mp4