110 lines
4.1 KiB
C#
110 lines
4.1 KiB
C#
using FFMpegCore;
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using FFMpegCore.Enums;
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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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try
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{
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// 1. 获取视频信息
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var 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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// 2. 创建临时目录
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string tempDir = Path.Combine(Path.GetTempPath(), Guid.NewGuid().ToString());
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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, "convert.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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File.Delete(outputPath);
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}
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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 = 1.0 / frameRate; // 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 = (randomFrame - 1) * frameDuration; // 目标帧开始时间
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double nextFrameTime = frameTime + frameDuration; // 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, "video_part1.mp4");
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string videoPart2 = Path.Combine(tempDir, "video_part2.mp4");
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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 JoinVideo(outputPath, [videoPart1, videoPart2]);
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}
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return false;
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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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}
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public static bool SubVideo(string inputPath, string outputPath, Double startSec, Double endSec)
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{
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return FFMpeg.SubVideo(inputPath, outputPath, TimeSpan.FromSeconds(startSec), TimeSpan.FromSeconds(endSec));
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}
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public static bool JoinVideo(string outPutPath, string[] videoParts)
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{
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return FFMpeg.Join(outPutPath, videoParts);
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}
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}
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}
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