Unity使用FFMpeg

news/2024/11/20 21:34:15/

Unity启动FFMpeg

private static bool StartUpFFmpeg(){bool isWinPlatform = true;if (Application.platform != RuntimePlatform.WindowsEditor &&Application.platform != RuntimePlatform.WindowsPlayer){isWinPlatform = false;}if (!isWinPlatform){string iOSPath = string.Empty;string extcutablesPath = string.Empty;if (Application.platform == RuntimePlatform.OSXEditor){iOSPath = Path.Combine(Application.dataPath, "CKTools/Plugins/FFMpeg/Mac/ffmpeg");extcutablesPath = Path.Combine(Application.dataPath, "CKTools/Plugins/FFMpeg/Mac");}else if (Application.platform == RuntimePlatform.OSXPlayer){iOSPath = Util.BuildsPath.Replace("YRBuilds", "FFMpeg/ffmpeg");extcutablesPath = Util.BuildsPath.Replace("YRBuilds", "FFMpeg");}sys_chmod(iOSPath, 755);FFmpeg.SetExecutablesPath(extcutablesPath, "ffmpeg", "ffmpeg");}else{string extcutablesPath = string.Empty;if (Application.platform == RuntimePlatform.WindowsEditor)extcutablesPath = Path.Combine(Application.dataPath, "CKTools/Plugins/FFMpeg/Windows");else if (Application.platform == RuntimePlatform.WindowsPlayer)extcutablesPath = Util.BuildsPath.Replace("YRBuilds", "FFMpeg");FFmpeg.SetExecutablesPath(extcutablesPath, "ffmpeg", "ffmpeg");}return true;}
使用ffmpeg将音频文件转为wav 16k 单声道

   public static async UniTask ConvertToWav(string inputFile, string outputPath = null){if (string.IsNullOrEmpty(outputPath)){outputPath = Path.Combine(Path.GetDirectoryName(inputFile),Path.GetFileNameWithoutExtension(inputFile) + "_bak.wav");}if (File.Exists(outputPath)) File.Delete(outputPath);if (!StartUpFFmpeg())return;string arguments = $"-i {inputFile} -vn -ar 16000 -ac 1 -b:a 16k -f wav -y {outputPath}";await FFmpeg.Conversions.New().Start(arguments);}

 对于图片的水平或者竖向分割

  public static async void SplitHalfOfPicture(string inputPath, string outPath1 = null, string outPath2 = null,string spliteType = "Ver"){if (!StartUpFFmpeg() || string.IsNullOrEmpty(inputPath))return;if (!File.Exists(inputPath)){YRLog.LogInfo("CKUtils SplitHalfOfPicture", $"文件不存在。路径：{inputPath}");return;}string extension = Path.GetExtension(inputPath);if (string.IsNullOrEmpty(outPath1))outPath1 = inputPath.Replace($".{extension}", $"split_1.{extension}");if (string.IsNullOrEmpty(outPath2))outPath2 = inputPath.Replace($".{extension}", $"split_2.{extension}");string arguments;if (spliteType.Equals("Ver"))arguments =$" -i \"{inputPath}\" -vf 'crop=iw/2:ih:0:0' -lossless 0 -quality 75 -y \"{outPath1}\" -vf 'crop=iw/2:ih:iw/2:0' -lossless 0 -quality 75 -y \"{outPath2}\"";elsearguments =$" -i \"{inputPath}\" -vf 'crop=iw:ih/2:0:0' -lossless 0 -quality 75 -y \"{outPath1}\" -vf 'crop=iw:ih/2:0:ih/2' -lossless 0 -quality 75 -y \"{outPath2}\"";await FFmpeg.Conversions.New().Start(arguments);}
图片大于1920*1080 = 2073600 进行压缩
   public static async UniTask ScalePicture(string inputPath, Action action = null){if (!StartUpFFmpeg())return;string suffix = Path.GetExtension(inputPath);string outPath = inputPath;if (!suffix.Equals(".jpg")){outPath = inputPath.Replace(suffix, ".jpg");if (File.Exists(outPath))File.Delete(outPath);File.Move(inputPath, outPath);}string tmpOutputPath = Path.Combine(Path.GetDirectoryName(outPath),Path.GetFileNameWithoutExtension(outPath) + "_bak.jpg");//-pix_fmt yuva422p  某些图片会如果色彩空间是 YUVA 通过命令会 YUV 色彩饱和度会增加 string arguments1 =$"-i \"{outPath}\" -vf \"scale='if(gt(ih*iw,2073600),iw/sqrt(ih*iw/2073600),iw)':'if(gt(ih*iw,2073600),ih/sqrt(ih*iw/2073600),ih)'\"  -y \"{tmpOutputPath}\" ";Debug.Log("ScalePicture ffmpeg:" + arguments1);await FFmpeg.Conversions.New().Start(arguments1);if (File.Exists(outPath)){try{File.Create(outPath).Dispose();File.Delete(outPath);}catch (Exception e){Console.WriteLine(e);throw;}}if (File.Exists(tmpOutputPath)){if (File.Exists(inputPath)){try{File.Create(inputPath).Dispose();File.Delete(inputPath);}catch (Exception e){Console.WriteLine(e);throw;}}File.Move(tmpOutputPath, inputPath);}action?.Invoke();}

压缩视频

  public static async UniTask CompressVideo(string inputPath){if (!StartUpFFmpeg())return;if (!File.Exists(inputPath))return;string rawPath = inputPath.Replace(".mp4", "_raw.mp4");if (File.Exists(rawPath))File.Delete(rawPath);File.Move(inputPath, rawPath);// string arguments = $"-i \"{rawPath}\" -s 1920*1080 -b:v 2000k -y \"{inputPath}\"";string arguments =$"-i \"{rawPath}\" -vf scale=-1:1080 -b:v {CKStatics.VIDEO_LIMIT_BITRATE}k -r 25 -c:v libx264 -profile:v main -level:v 4.0 -c:a copy -y \"{inputPath}\"";Debug.Log("CompressVideo ffmpeg:" + arguments);await FFmpeg.Conversions.New().Start(arguments);}
根据时间点 切割音频
 public static async UniTask SplitAudioByTime(string audioPath, List<float> times){if (!StartUpFFmpeg())return;if (times == null || times.Count <= 0)return;//需要对时间排序 如果顺序不对 FFmpeg会报错times.Sort((a, b) => (a.CompareTo(b)));string tempTimes = string.Empty;for (int i = 0; i < times.Count; i++){string time = SecondToHour(times[i]);if (i == times.Count - 1)tempTimes = $"{tempTimes}{time}";elsetempTimes = $"{tempTimes}{time},";}YRLog.LogInfo(TAG, "根据时间点 切割音频");string extension = Path.GetExtension(audioPath);string noExtensionPath = Path.GetFullPath(audioPath).Replace(extension, "");string arguments =$"-i \"{audioPath}\" -f segment -segment_times {tempTimes} -c copy -map 0 \"{noExtensionPath}_%d{extension}\"";YRLog.LogInfo(TAG, $"SplitAudioByTime arguments:{arguments}");await FFmpeg.Conversions.New().Start(arguments);}

压缩音频成为MP3

  public static async UniTask<string> CompressAudioToMp3(string inputPath){if (!StartUpFFmpeg())return inputPath;string dir = Path.GetDirectoryName(inputPath).Replace("\\", "/");string name = Path.GetFileNameWithoutExtension(inputPath);string outPath = $"{dir}/_fix{name}.mp3";string tempInputPath = string.Empty;string tempOutPath = string.Empty;if (CKStatics.toolModeType != ToolModeType.Course){tempInputPath = CKBookUtils.GetBookAbsolutePath(inputPath);tempOutPath = CKBookUtils.GetBookAbsolutePath(outPath);if (!File.Exists(tempInputPath)){CKToast.Instance.ToastShow("文件不存在");YRLog.LogInfo(TAG, $"{tempInputPath} 文件不存在");return inputPath;}}else{tempInputPath = inputPath;tempOutPath = outPath;}string arguments = $"-i {tempInputPath} -vn -ar 44100 -ac 2 -b:a 192k -acodec mp3 -y {tempOutPath}";YRLog.LogInfo(TAG, $"CompressAudioToMp3 参数 {arguments}");await FFmpeg.Conversions.New().Start(arguments);return outPath;}


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