ffmpeg C# 切第一秒的有图片

FfmpegHelper.cs 文件

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Service
{
    public static class FfmpegHelper
    {
        /// <summary>
        /// 从视频画面中截取一帧画面为图片
        /// </summary>
        /// <param name="videoName">视频文件路径pic/123.MP4</param>
        /// <param name="cutTimeFrame">开始截取的时间如:"1s"</param>
        /// <param name="widthAndHeight">图片的尺寸如:240*180</param>
        /// <returns>返回图片保存路径</returns>
        public static string GetPicFromVideo(string videoName, string imageFile = "", string cutTimeFrame= "1s", string imagePath = "/CoverImage/ProjectEvent/", string widthAndHeight="")
        {

            var vdoName = videoName.Substring(videoName.LastIndexOf("/") + 1); //视频名称 例：260026077324.mp4
            var fileName = vdoName.Split('.')[0];//视频名称 例:260026077324

            string basePath = System.AppDomain.CurrentDomain.BaseDirectory;//获取当前路径 例：F:TT正式天台20171130TTCloudTTCloud.Website
            var ImgPath = basePath + imagePath.Replace("/", "\"); //建立新文件夹路径 例F:TT20171130TTCloudTTCloud.WebsiteuploadImages2020-04-20
            //ffmpeg.exe路径
            var ffmpeg = basePath + "\ffmpeg\ffmpeg.exe"; // 例：F:TT20171130TTCloudTTCloud.Websiteinffmpeg.exe
            var srcName = (File.Exists(videoName))? videoName.Replace("/", "\") : basePath + videoName.Replace("/", "\"); //视频路径 例：F:TT20171130TTCloudTTCloud.Website\Upload10000000TTVideo260026077324.mp4

            if (!Directory.Exists(ImgPath))
            {
                Directory.CreateDirectory(ImgPath);
            } //创建保存封面图片的路径
            try
            {
                //保存截取图片后路径
                var objName = ImgPath + "\" + (string.IsNullOrEmpty(imageFile)? fileName: imageFile) + ".jpg";
            ProcessStartInfo startInfo = new ProcessStartInfo();
            startInfo.WindowStyle = ProcessWindowStyle.Hidden;
            startInfo.Arguments = " -i " + srcName  //视频路径
                                 + " -y -f image2 -ss " + cutTimeFrame  //设置开始获取帧的视频时间
                                 + " -t 0.001 "//-s " + widthAndHeight //设置图片的分辨率
                                 + " " + objName; //输出的图片文件名，路径前必须有空格
            startInfo.UseShellExecute = false;
            startInfo.CreateNoWindow = true;
            startInfo.FileName = ffmpeg;
            startInfo.WindowStyle = ProcessWindowStyle.Hidden;
            
                Process proc = new Process();
                proc.StartInfo = startInfo;
                proc.Start();
                proc.WaitForExit();//不等待完成就不调用此方法
                proc.Close();
                proc.Dispose();
                return $"{imagePath}{fileName}.jpg";
            }
            catch (Exception e)
            {
                return "";
            }
        }

    }
}

文件夹（ffmpeg）调试就放到Debug下面

如果明发到iis注意权限，windows servers 服务器注意要安装一个组件否则也切不了图

如果在发布的服务器实在找不到原因,就使用命令测试会报出问题:

d:ffmpegffmpeg.exe -i d:ffmpeg est.mp4 -y -f image2 -ss 1s -t 0.001 d:ffmpeg est.jpg