FFmpeg的Static版本的bin文件夹中只有三个.exe文件，分别是：ffmpeg.exe，ffplay.exe和ffprobe.exe，各功能如下：

ffmpeg.exe：音视频转码、转换器

ffplay.exe：简单的音视频播放器

ffprobe.exe：多媒体码流分析器

以下实现了基于ffmpeg.exe和ffprobe.exe的视频总帧数获取和取某一帧的图像方法，可根据需求进行扩展。

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading;
using System.Threading.Tasks;namespace VideoCheck
{public class CFFmpeg{string ffmpegPath = ""; string ffprobePath = "";public CFFmpeg(){if (System.IntPtr.Size == 4){ffmpegPath = Environment.CurrentDirectory + "\\ffmpeg\\x86\\ffmpeg.exe";ffprobePath = Environment.CurrentDirectory + "\\ffmpeg\\x86\\ffprobe.exe";}else if (System.IntPtr.Size == 8){ffmpegPath = Environment.CurrentDirectory + "\\ffmpeg\\x64\\ffmpeg.exe";ffprobePath = Environment.CurrentDirectory + "\\ffmpeg\\x64\\ffprobe.exe";}}const int SW_HIDE = 0;[DllImport("user32.dll")]static extern bool ShowWindow(IntPtr hWnd, int nCmdShow);/// <summary>/// 获取视频有效总帧数/// </summary>/// <param name="videoPath"></param>/// <returns></returns>public int GetTotalFrameCnt(string videoPath){System.Diagnostics.Process process = new System.Diagnostics.Process();process.StartInfo = new System.Diagnostics.ProcessStartInfo(ffprobePath);process.StartInfo.WindowStyle = System.Diagnostics.ProcessWindowStyle.Hidden;process.StartInfo.RedirectStandardOutput = true;process.StartInfo.UseShellExecute = false;//示例：ffprobe - v error - count_frames - select_streams v: 0 - show_entries stream = nb_read_frames - of default = nokey = 1:noprint_wrappers = 1 C: \Users\whf\Desktop\大和路Y430 - Y428.ASFstring args = " -v error -count_frames -select_streams v:0 -show_entries stream=nb_read_frames -of default=nokey=1:noprint_wrappers=1 " + "\"" + videoPath + "\"";process.StartInfo.Arguments = args.Replace("\\", "/");try{process.Start();while (process.MainWindowHandle == IntPtr.Zero){process.Refresh();}ShowWindow(process.MainWindowHandle, SW_HIDE);StringBuilder sb = new StringBuilder();while (!process.HasExited){sb.Append(process.StandardOutput.ReadToEnd());}string str = sb.ToString().Trim();int num = 0;bool ret = int.TryParse(str,out num);return num;}catch (Exception ex){return 0;}}/// <summary>/// 截取视频图片/// </summary>/// <param name="videoPath">视频路径</param>/// <param name="videoFrameIndex">视频帧号</param>/// <param name="outImagePath">图像输出路径</param>/// <returns></returns>public bool CatchImage(string videoPath,int videoFrameIndex, string outImagePath){System.Diagnostics.Process process = new System.Diagnostics.Process();process.StartInfo = new System.Diagnostics.ProcessStartInfo(ffmpegPath);process.StartInfo.WindowStyle = System.Diagnostics.ProcessWindowStyle.Hidden;if (File.Exists(outImagePath))File.Delete(outImagePath);else{FileInfo fileInfo = new FileInfo(videoPath);if (!Directory.Exists(fileInfo.DirectoryName))Directory.CreateDirectory(fileInfo.DirectoryName);}int sec = (int)(videoFrameIndex / 25.0f);//-ss后跟的时间单位为秒 ，放前面可加快速度string args = " -y -ss " + sec+ " -i " + "\""+ videoPath +"\""+ " -frames 1 -f image2 " + "\"" + outImagePath+"\"";process.StartInfo.Arguments = args.Replace("\\","/");try{process.Start();process.WaitForExit();}catch(Exception ex){return false;};if (System.IO.File.Exists(outImagePath)){return true;}return false;}}
}