切割mp4 h264视频文件，无需重新编码

2 回答

• 4

  libmp4v2为您提供构建某些内容的原语 . 我不知道这样做的免费现成解决方案，尽管只要你切割I帧边界就可以相对容易地实现 .

  回复于 2024-04-19T23:46:14+08:00
• 0

  我不知道如何在不重新编码（转码）的情况下拆分视频，但在Windows 8上转码视频已经内置：

  要修剪文件，请调用aysnc方法PrepareFileTranscodeAsync，然后在PrepareTranscodeResult对象上调用TranscodeAsync方法 .

  例如：

  async void TrimFile(StorageFile srcFile, StorageFile destFile)
  {
      MediaEncodingProfile profile =
          MediaEncodingProfile.CreateMp4(VideoEncodingQuality.HD720p);
  
      MediaTranscoder transcoder = new MediaTranscoder();
  
      // Set the start of the trim.
      transcoder.TrimStartTime = new TimeSpan(0, 0, 1);
  
      // Set the end of the trim.
      transcoder.TrimStopTime = new TimeSpan(0, 0, 9);
  
      PrepareTranscodeResult prepareOp = await
          transcoder.PrepareFileTranscodeAsync(srcFile, destFile, profile);
  
      if (prepareOp.CanTranscode)
      {
          var transcodeOp = prepareOp.TranscodeAsync();
          transcodeOp.Progress +=
              new AsyncActionProgressHandler<double>(TranscodeProgress);
          transcodeOp.Completed +=
              new AsyncActionWithProgressCompletedHandler<double>(TranscodeComplete);
      }
      else
      {
          switch (prepareOp.FailureReason)
          {
              case TranscodeFailureReason.CodecNotFound:
                  OutputText("Codec not found.");
                  break;
              case TranscodeFailureReason.InvalidProfile:
                  OutputText("Invalid profile.");
                  break;
              default:
                  OutputText("Unknown failure.");
                  break;
          }
      }
  }
  

  How to trim a video file (Windows Store apps using C#/VB/C++ and XAML)

  对于较旧的Windows，也可以Splicer（使用DirectShow.Net） .

  希望它可以帮助某人 .

  回复于 2024-04-19T23:46:14+08:00