C# 视频上传之使用ffmpeg截取视频第一帧当做背景图

系统管理员 2023-08-17 16:13 65阅读 0赞

1、在官网下载ffmpeg,[http://ffmpeg.org/download.html][http_ffmpeg.org_download.html]

![943588-20190816125618943-1900137683.png][]

![943588-20190816125628045-1072511103.png][]

我下载的是Windows 64的，如系统是Windows 32，请下载Windows 32-bit

下载完成后解压，得到如下图文件：

![943588-20190816125647823-56796866.png][]

打开bin文件：

![943588-20190816125659143-1924789381.png][]

把bin文件夹所有.dll和.exe文件复制到项目bin文件夹下。

如果想通过cmd命令截取，需要将ffmpeg.exe的路径配置到环境变量里的Path里,可参考[https://www.cnblogs.com/hbtmwangjin/articles/9519848.html][https_www.cnblogs.com_hbtmwangjin_articles_9519848.html]  。

我这里是通过代码截取第一帧图片，保存到后台，并把图片路径保存到数据库中，没有配置环境变量也可以操作。

截取图片方法：

/// <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="widthAndHeight">图片的尺寸如:240*180</param>
            /// <param name="cutTimeFrame">开始截取的时间如:"1s"</param>
            /// <returns>返回图片保存路径</returns>
            public static string GetPicFromVideo(string videoName, string widthAndHeight, string cutTimeFrame)
            {
                var vdoName = videoName.Substring(videoName.LastIndexOf("/") + 1);
                var fileName = vdoName.Split('.')[0];
                var dtime = DateTime.Now.ToString("yyyy-MM-dd");
                var basePath = System.Web.HttpContext.Current.Server.MapPath("~");
                var ImgPath = basePath + "upload\\Images\\" + dtime;
                //ffmpeg.exe路径
                var ffmpeg = basePath + "bin\\ffmpeg.exe";
                var srcName = basePath + videoName.Replace("/", "\\");
                
                if (!Directory.Exists(ImgPath))
                {
                    Directory.CreateDirectory(ImgPath);
                }
                //保存截取图片后路径
                var objName = " "+ ImgPath + "\\"+  fileName + ".jpg";
                var startInfo = new ProcessStartInfo(ffmpeg);
                startInfo.WindowStyle = ProcessWindowStyle.Hidden;
                startInfo.Arguments = " -i " + srcName + " -y -f image2 -ss " + cutTimeFrame + " -t 0.001 -s " + widthAndHeight + " " + objName;
                //startInfo.UseShellExecute = false;
                //startInfo.CreateNoWindow = true;
                try
                {
                    Process.Start(startInfo);
                    //返回图片保存路径
                    return "/upload/Images/" + dtime+"/" + fileName + ".jpg";
                }
                catch (Exception re)
                {
                    //Log.WriteLog(re.Message);
                    return "";
                }
            }

调用：

var  gb_img_scr = PicFromVideo.GetPicFromVideo(src, "160*300", "1");

转载于:https://www.cnblogs.com/xinbaba/p/11363224.html

[http_ffmpeg.org_download.html]: http://ffmpeg.org/download.html
[943588-20190816125618943-1900137683.png]: /images/20230810/862665f2b1ea4189a9876f83aa353f60.png
[943588-20190816125628045-1072511103.png]: /images/20230810/b8cb354bf8374c44b547471436a1350c.png
[943588-20190816125647823-56796866.png]: /images/20230810/e1bdbfba481d4adf9ffda86f5d6347e0.png
[943588-20190816125659143-1924789381.png]: /images/20230810/576fc609ae234e59b5a73ee94d47667e.png
[https_www.cnblogs.com_hbtmwangjin_articles_9519848.html]: https://www.cnblogs.com/hbtmwangjin/articles/9519848.html