389 lines
15 KiB
C#
389 lines
15 KiB
C#
using FFMpegCore;
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using FFMpegCore.Enums;
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using Standard;
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using System;
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using System.IO;
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using System.Threading.Tasks;
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using VideoConcat.Common.Tools;
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using static System.Windows.Forms.DataFormats;
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namespace VideoConcat.Services.Video
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{
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public class VideoProcess
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{
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/// <summary>
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/// 同步删除视频指定帧和对应音频片段
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/// </summary>
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/// <param name="inputPath">输入文件路径</param>
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/// <param name="outputPath">输出文件路径</param>
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/// <param name="frameNumber">要删除的帧编号（从1开始）</param>
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/// <returns>操作是否成功</returns>
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public static async Task<bool> RemoveFrameRandomeAsync(string inputPath, string outputPath)
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{
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if (!File.Exists(inputPath))
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return false;
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// 创建临时目录
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string tempDir = Path.Combine(Path.GetTempPath(), Guid.NewGuid().ToString());
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try
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{
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// 1. 获取视频信息
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IMediaAnalysis mediaInfo = await FFProbe.AnalyseAsync(inputPath);
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var videoStream = mediaInfo.PrimaryVideoStream;
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if (videoStream == null)
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{
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Console.WriteLine("没有找到视频流");
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return false;
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}
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bool isHevc = videoStream.CodecName == "hevc";
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Directory.CreateDirectory(tempDir);
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if (isHevc)
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{
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try
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{
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// 临时文件路径
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string videoConvert = Path.Combine(tempDir, $"{Guid.NewGuid()}.mp4");
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await FFMpegArguments.FromFileInput(inputPath)
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.OutputToFile(videoConvert, true, opt => // 设置输出格式
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opt.WithVideoCodec("libx264")
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).ProcessAsynchronously();
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mediaInfo = await FFProbe.AnalyseAsync(videoConvert);
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inputPath = videoConvert;
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}
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catch (Exception)
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{
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throw new Exception("转换失败！");
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}
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}
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// 1. 获取视频信息
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mediaInfo = await FFProbe.AnalyseAsync(inputPath);
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videoStream = mediaInfo.PrimaryVideoStream;
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if (videoStream == null)
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{
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Console.WriteLine("没有找到视频流");
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return false;
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}
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// 视频总时长（秒）
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double totalDuration = mediaInfo.Duration.TotalSeconds;
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double frameRate = videoStream.FrameRate;
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double frameDuration = Math.Round(1.0 / frameRate, 6); // 一帧时长（秒）
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int totalFram = (int)(totalDuration * frameRate);
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// 确保视频时长足够（至少20秒）
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if (totalDuration < 20)
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{
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LogUtils.Error($"视频时长太短（{totalDuration}秒），无法抽帧");
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return false;
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}
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var random = new Random();
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// 随机选择要删除的帧时间点（避开开头和结尾）
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int maxFrameTime = (int)totalDuration - 5; // 确保有足够的空间
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int minFrameTime = 20; // 从20秒开始
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if (maxFrameTime <= minFrameTime)
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{
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maxFrameTime = minFrameTime + 1;
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}
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var randomFrame = random.Next(minFrameTime, maxFrameTime);
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//return RemoveVideoFrame(inputPath, outputPath, randomFrame);
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string videoPart1 = Path.Combine(tempDir, $"{Guid.NewGuid()}.mp4");
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string videoPart2 = Path.Combine(tempDir, $"{Guid.NewGuid()}.mp4");
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LogUtils.Info($"开始抽帧：输入={inputPath}, 输出={outputPath}, 删除帧时间={randomFrame}秒");
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bool hasSubVideo1 = SubVideo(inputPath, videoPart1, 0, randomFrame - 0.016);
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if (!hasSubVideo1)
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{
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LogUtils.Error($"裁剪第一部分视频失败：{videoPart1}");
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return false;
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}
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bool hasSubVideo2 = SubVideo(inputPath, videoPart2, randomFrame, totalDuration);
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if (!hasSubVideo2)
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{
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LogUtils.Error($"裁剪第二部分视频失败：{videoPart2}");
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return false;
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}
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LogUtils.Info($"视频裁剪成功，开始合并：{videoPart1} + {videoPart2} -> {outputPath}");
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bool isJoinSuccess = JoinVideo(outputPath, [videoPart1, videoPart2]);
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if (!isJoinSuccess)
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{
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LogUtils.Error($"合并视频失败：{outputPath}");
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return false;
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}
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// 验证输出文件是否存在
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if (File.Exists(outputPath))
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{
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LogUtils.Info($"抽帧成功：{outputPath}");
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return true;
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}
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else
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{
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LogUtils.Error($"抽帧失败：输出文件不存在 - {outputPath}");
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return false;
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}
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}
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catch (Exception ex)
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{
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LogUtils.Error("抽帧失败", ex);
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Console.WriteLine($"操作失败: {ex.Message}");
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return false;
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}
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finally
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{
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// 清理临时目录
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try
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{
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if (Directory.Exists(tempDir))
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{
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string[] files = Directory.GetFiles(tempDir);
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foreach (string file in files)
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{
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try
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{
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File.Delete(file);
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}
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catch
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{
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// 忽略删除失败
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}
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}
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try
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{
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Directory.Delete(tempDir);
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}
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catch
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{
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// 忽略删除失败
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}
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}
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}
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catch
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{
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// 忽略清理错误
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}
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}
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}
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/// <summary>
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/// 通过修改视频元数据（添加注释）改变MD5
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/// </summary>
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public static bool ModifyByMetadata(string inputPath, string outputPath, string comment = "JSY")
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{
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// 添加或修改视频元数据中的注释信息
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return FFMpegArguments
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.FromFileInput(inputPath)
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.OutputToFile(outputPath, true, options => options
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//.WithVideoCodec("copy") // 直接复制视频流，不重新编码
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//.WithAudioCodec("copy") // 直接复制音频流
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.CopyChannel()
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.WithCustomArgument($"-metadata comment=\"{comment}_{Guid.NewGuid()}\"") // 添加唯一注释
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)
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.ProcessSynchronously();
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}
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public static bool SubVideo(string inputPath, string outputPath, Double startSec, Double endSec)
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{
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try
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{
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// 计算时长
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double duration = endSec - startSec;
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if (duration <= 0)
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{
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LogUtils.Error($"SubVideo失败：时长无效，开始={startSec}秒, 结束={endSec}秒");
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return false;
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}
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LogUtils.Info($"SubVideo：输入={inputPath}, 输出={outputPath}, 开始={startSec}秒, 结束={endSec}秒, 时长={duration}秒");
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// 使用 -ss 和 -t 参数进行裁剪
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bool result = FFMpegArguments
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.FromFileInput(inputPath, true, options => options
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.Seek(TimeSpan.FromSeconds(startSec))
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.WithCustomArgument($"-t {duration}")) // 指定时长而不是结束时间
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.OutputToFile(outputPath, true, options => options
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.CopyChannel()) // 复制流，不重新编码
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.ProcessSynchronously();
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// 验证输出文件是否存在
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if (result && File.Exists(outputPath))
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{
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FileInfo fileInfo = new FileInfo(outputPath);
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LogUtils.Info($"SubVideo成功：{outputPath}, 文件大小={fileInfo.Length / 1024 / 1024}MB");
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return true;
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}
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else
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{
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LogUtils.Error($"SubVideo失败：输入={inputPath}, 输出={outputPath}, 开始={startSec}秒, 结束={endSec}秒, 结果={result}, 文件存在={File.Exists(outputPath)}");
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return false;
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}
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}
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catch (Exception ex)
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{
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LogUtils.Error($"SubVideo异常：输入={inputPath}, 输出={outputPath}", ex);
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return false;
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}
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}
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public static bool SubAudio(string inputPath, string outputPath, Double startSec, Double endSec)
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{
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return FFMpegArguments
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.FromFileInput(inputPath, true, options => options.Seek(TimeSpan.FromSeconds(startSec)).EndSeek(TimeSpan.FromSeconds(endSec)))
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.OutputToFile(outputPath, true, options => options.CopyChannel())
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.ProcessSynchronously();
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}
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public static bool JoinVideo(string outPutPath, string[] videoParts)
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{
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try
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{
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// 验证所有输入文件是否存在
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foreach (var part in videoParts)
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{
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if (!File.Exists(part))
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{
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LogUtils.Error($"JoinVideo失败：输入文件不存在 - {part}");
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return false;
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}
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}
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bool result = FFMpeg.Join(outPutPath, videoParts);
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// 验证输出文件是否存在
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if (result && File.Exists(outPutPath))
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{
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LogUtils.Info($"JoinVideo成功：{outPutPath}");
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return true;
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}
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else
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{
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LogUtils.Error($"JoinVideo失败：输出文件不存在 - {outPutPath}");
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return false;
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}
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}
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catch (Exception ex)
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{
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LogUtils.Error($"JoinVideo异常：输出={outPutPath}", ex);
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return false;
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}
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}
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public async Task<bool> ProcessVideo(string inputPath, string outputPath, string tempDir)
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{
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// 1. 获取视频信息
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IMediaAnalysis mediaInfo = await FFProbe.AnalyseAsync(inputPath);
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var videoStream = mediaInfo.PrimaryVideoStream;
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if (videoStream == null)
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{
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Console.WriteLine("没有找到视频流");
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return false;
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}
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// 视频总时长（秒）
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var totalDuration = mediaInfo.Duration.TotalSeconds;
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// 计算帧时间参数
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double frameRate = videoStream.FrameRate;
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double frameDuration = Math.Round(1.0 / frameRate, 6); // 一帧时长（秒）
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int totalFram = (int)(totalDuration * frameRate);
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// 2. 随机生成要删除的帧的时间点（避开最后一帧，防止越界）
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var random = new Random();
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var randomFrame = random.Next(20, totalFram - 10);
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double frameTime = Math.Round((randomFrame - 1) * frameDuration, 6); // 目标帧开始时间
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double nextFrameTime = Math.Round((randomFrame + 1) * frameDuration, 6); // 下一帧开始时间
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// 临时文件路径
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string videoPart1 = Path.Combine(tempDir, $"{Guid.NewGuid()}.mp4");
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string videoPart2 = Path.Combine(tempDir, $"{Guid.NewGuid()}.mp4");
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string audioPath = Path.Combine(tempDir, $"{Guid.NewGuid()}.aac");
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string videoNoaudioPath = Path.Combine(tempDir, $"{Guid.NewGuid()}.mp4");
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string finalyPath = Path.Combine(tempDir, $"{Guid.NewGuid()}.mp4");
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string audioPart1 = Path.Combine(tempDir, $"{Guid.NewGuid()}.aac");
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string audioPart2 = Path.Combine(tempDir, $"{Guid.NewGuid()}.aac");
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// 分离视频流（不含音频）
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await FFMpegArguments
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.FromFileInput(inputPath)
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.OutputToFile(videoNoaudioPath, true, opt => opt.WithCustomArgument("-an -c:v copy"))
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.ProcessAsynchronously();
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if (!File.Exists(videoNoaudioPath))
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return false;
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// 分离音频流（不含视频）（如有音频）
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if (mediaInfo.PrimaryAudioStream != null)
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{
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await FFMpegArguments
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.FromFileInput(inputPath)
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.OutputToFile(audioPath, true, opt => opt.WithCustomArgument("-vn -c:a copy"))
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.ProcessAsynchronously();
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if (!File.Exists(audioPath))
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return false;
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}
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inputPath = videoNoaudioPath;
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bool hasSubVideo1 = SubVideo(inputPath, videoPart1, 0, frameTime);
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bool hasSubVideo2 = SubVideo(inputPath, videoPart2, nextFrameTime, totalDuration);
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if (!hasSubVideo1 || !hasSubVideo2)
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{
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return false;
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}
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bool isJoinSuccess = JoinVideo(finalyPath, [videoPart1, videoPart2]);
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if (!isJoinSuccess)
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{
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return false;
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}
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return await FFMpegArguments.FromFileInput(finalyPath)
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.AddFileInput(audioPath)
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.OutputToFile(outputPath, true, opt =>
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opt.WithCustomArgument("-c copy -shortest -y"))
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.ProcessAsynchronously();
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}
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public static bool RemoveVideoFrame(string inputPath, string outputPath, int frameToRemove)
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{
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// 使用FFMpegArguments构建转换流程
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return FFMpegArguments
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.FromFileInput(inputPath)
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.OutputToFile(outputPath, true, options => options
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// 使用select过滤器排除指定帧（帧序号从0开始）
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.WithCustomArgument($"select=not(eq(n\\,{frameToRemove}))")
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// $"not(eq(n\\,{frameToRemove}))"); // 注意：在C#中需要转义反斜杠
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//// 保持其他编码参数
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.WithVideoCodec("libx264")
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.WithAudioCodec("copy") // 如果不需要处理音频，直接复制
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)
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.ProcessSynchronously();
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}
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}
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}
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