C# 获取视频编码 及 分辨率

C# 获取视频编码 及 分辨率

1、需要借助外部工具：ffmpeg.exe

下载地址：https://download.csdn.net/download/qq_41054313/20680212

2、将下载的内容解压缩，并将bin文件夹的内容复制到debug文件夹

 

 复制到运行程序根目录

 3、复制如下程序：

using MediaInfoDotNet;
using MediaInfoLib;
using RabbitMQ.Client;
using System;
using System.Diagnostics;
using System.IO;
using System.Net.Http;
using System.Text.RegularExpressions;
using System.Threading.Tasks; 

namespace ConsoleApp1
{
    internal class Program
    {
        public static async Task Main(string[] args)
        {
            string videoUrl = "https://xxxx.oss-cn-shanghai.aliyuncs.com/b3bbbca25d10488eaed62d634317907b.mp4";
            string tempVideoPath = Path.Combine("D:\\logs\\", $"temp_video_{Guid.NewGuid()}.mp4");
            using (HttpClient client = new HttpClient())
            {
                var response = await client.GetAsync(videoUrl);
                response.EnsureSuccessStatusCode();
                using (var streamToReadFrom = await response.Content.ReadAsStreamAsync())
                using (var streamToWriteTo = File.OpenWrite(tempVideoPath))
                {
                    await streamToReadFrom.CopyToAsync(streamToWriteTo);
                }
            }
            int? width = 0;
            int? height = 0;
            string error = string.Empty;
            GetMovWidthAndHeight(tempVideoPath, out width, out height,ref error);
            if (error.Contains("h264"))
            {
                Console.WriteLine("视频编码正确。");
            }
            if (width == 1080 && height == 1600)
            {
                Console.WriteLine("视频分辨率正确。");
            }
            else
            {
                Console.WriteLine("视频分辨率错误。");
            }

        }

        /// <summary>
        /// 执行一条command命令
        /// </summary>
        /// <param name="command">需要执行的Command</param>
        /// <param name="output">输出</param>
        /// <param name="error">错误</param>
        public static void ExecuteCommand(string command, out string output, out string error)
        {
            try
            {
                //创建一个进程
                Process pc = new Process();
                pc.StartInfo.FileName = command;
                pc.StartInfo.UseShellExecute = false;
                pc.StartInfo.RedirectStandardOutput = true;
                pc.StartInfo.RedirectStandardError = true;
                pc.StartInfo.CreateNoWindow = true;

                //启动进程
                pc.Start();

                //准备读出输出流和错误流
                string outputData = string.Empty;
                string errorData = string.Empty;
                pc.BeginOutputReadLine();
                pc.BeginErrorReadLine();

                pc.OutputDataReceived += (ss, ee) =>
                {
                    outputData += ee.Data;
                };

                pc.ErrorDataReceived += (ss, ee) =>
                {
                    errorData += ee.Data;
                };

                //等待退出
                pc.WaitForExit();

                //关闭进程
                pc.Close();

                //返回流结果
                output = outputData;
                error = errorData;
            }
            catch (Exception)
            {
                output = null;
                error = null;
            }
        }
        /// <summary>
        /// 获取视频的帧宽度和帧高度
        /// </summary>
        /// <param name="videoFilePath">mov文件的路径</param>
        /// <returns>null表示获取宽度或高度失败</returns>
        public static void GetMovWidthAndHeight(string videoFilePath, out int? width, out int? height,ref string error)
        {
            try
            {
                //判断文件是否存在
                if (!File.Exists(videoFilePath))
                {
                    width = null;
                    height = null;
                }

                //执行命令获取该文件的一些信息 
                string ffmpegPath = new FileInfo(Process.GetCurrentProcess().MainModule.FileName).DirectoryName + @"\ffmpeg.exe";

                string output; 
               ExecuteCommand("\"" + ffmpegPath + "\"" + " -i " + "\"" + videoFilePath + "\"", out output, out error);
                if (string.IsNullOrEmpty(error))
                {
                    width = null;
                    height = null;
                }

                //通过正则表达式获取信息里面的宽度信息
                Regex regex = new Regex("(\\d{2,4})x(\\d{2,4})", RegexOptions.Compiled);
                Match m = regex.Match(error);
                if (m.Success)
                {
                    width = int.Parse(m.Groups[1].Value);
                    height = int.Parse(m.Groups[2].Value);
                }
                else
                {
                    width = null;
                    height = null;
                }
            }
            catch (Exception)
            {
                width = null;
                height = null;
            }
        }
    }
     

}

4、完毕 over

 更新：

 
using Newtonsoft.Json;
using RabbitMQ.Client;
using System;
using System.Diagnostics;
using System.IO;
using System.Net.Http;
using System.Text.RegularExpressions;
using System.Threading.Tasks; 

namespace ConsoleApp1
{
    internal class Program
    {
        public static async Task Main(string[] args)
        { 
           var s = await GetMovWidthAndHeight("https://xxxx.oss-cn-shanghai.aliyuncs.com/65d28880d76548deb49bdbbabac79199.mp4");
            Console.WriteLine(JsonConvert.SerializeObject(s));
        }
         
        /// <summary>
        /// 执行一条command命令
        /// </summary>
        /// <param name="command">需要执行的Command</param>
        /// <param name="output">输出</param>
        /// <param name="error">错误</param>
        public static void ExecuteCommand(string command, out string output, out string error)
        {
            try
            {
                //创建一个进程
                Process pc = new Process();
                pc.StartInfo.FileName = command;
                pc.StartInfo.UseShellExecute = false;
                pc.StartInfo.RedirectStandardOutput = true;
                pc.StartInfo.RedirectStandardError = true;
                pc.StartInfo.CreateNoWindow = true;

                //启动进程
                pc.Start();

                //准备读出输出流和错误流
                string outputData = string.Empty;
                string errorData = string.Empty;
                pc.BeginOutputReadLine();
                pc.BeginErrorReadLine();

                pc.OutputDataReceived += (ss, ee) =>
                {
                    outputData += ee.Data;
                };

                pc.ErrorDataReceived += (ss, ee) =>
                {
                    errorData += ee.Data;
                };

                //等待退出
                pc.WaitForExit();

                //关闭进程
                pc.Close();

                //返回流结果
                output = outputData;
                error = errorData;
            }
            catch (Exception)
            {
                output = null;
                error = null;
            }
        }
        /// <summary>
        /// 获取视频的帧宽度和帧高度
        /// </summary>
        /// <param name="videoFilePath">mov文件的路径</param>
        /// <returns>null表示获取宽度或高度失败</returns>
        public static async Task<checkVideoResult> GetMovWidthAndHeight(string videoUrl)
        {
            checkVideoResult result = new checkVideoResult();
            string tempVideoPath = Path.Combine("D:\\logs\\", $"temp_video_{Guid.NewGuid()}.mp4");
            using (HttpClient client = new HttpClient())
            {
                var response = await client.GetAsync(videoUrl);
                response.EnsureSuccessStatusCode();
                using (var streamToReadFrom = await response.Content.ReadAsStreamAsync())
                using (var streamToWriteTo = File.OpenWrite(tempVideoPath))
                {
                    await streamToReadFrom.CopyToAsync(streamToWriteTo);
                }
            }
          
            try
            {
                //判断文件是否存在
                if (!File.Exists(tempVideoPath))
                {
                    return new checkVideoResult();
                }

                //执行命令获取该文件的一些信息 
                string ffmpegPath = new FileInfo(Process.GetCurrentProcess().MainModule.FileName).DirectoryName + @"\ffmpeg.exe";

                string output;
                string error;
               ExecuteCommand("\"" + ffmpegPath + "\"" + " -i " + "\"" + tempVideoPath + "\"", out output, out error);
                if (string.IsNullOrEmpty(error))
                {
                    return new checkVideoResult();
                }

                //通过正则表达式获取信息里面的宽度信息
                Regex regex = new Regex("(\\d{2,4})x(\\d{2,4})", RegexOptions.Compiled);
                Match m = regex.Match(error);
                if (m.Success)
                {
                    result.width = int.Parse(m.Groups[1].Value);
                    result.height = int.Parse(m.Groups[2].Value);
                }
                if (error.Contains("h264"))
                {
                    result.code = "h264";
                }
               
            }
            catch (Exception)
            {
                return new checkVideoResult();
            }
            return result;
        }
    }

    public class checkVideoResult
    {
        public int? width { get; set; }
        public int? height { get; set; }
        public string code { get; set; }
    }
     

}