/// <summary>
/// 截取音频后，对每个小音频获语音转文字
/// </summary>
/// <param name="startMilliSecond">开始时间戳</param>
/// <param name="endMilliSecond">结束时间戳</param>
/// <param name="reader">音频流</param>
/// <param name="i">用于创建新的文件</param>
/// <param name="language">语言（zh，en）</param>
/// <param name="splitTime">时间间隔</param>
private void GetBaiduSpeech1(TimeSpan startMilliSecond, TimeSpan endMilliSecond, string sound_path, int i, string language, double splitTime)
{
try
{
var reader = new AudioFileReader(sound_path);
//开始时间往前取startMilliSecond一半的偏移，结束时间往后取间隔时间的一半的偏移
if (i == 0)
{
startMilliSecond = startMilliSecond - TimeSpan.FromMilliseconds(startMilliSecond.TotalMilliseconds / 2);
}
else
{
startMilliSecond = startMilliSecond - TimeSpan.FromMilliseconds(splitTime / 2);
}
if (endMilliSecond < reader.TotalTime)//最后一次不用取偏移
{
endMilliSecond = endMilliSecond + TimeSpan.FromMilliseconds(splitTime / 2);
}
TimeSpan span = endMilliSecond - startMilliSecond;
if (span.TotalSeconds > 60)//超过60s，只取60秒
{
span = TimeSpan.FromSeconds(60);
}
var trimed = reader.Skip(startMilliSecond).Take(endMilliSecond - startMilliSecond);
//保存新的音频文件
string fileName = Path.GetFileNameWithoutExtension(sound_path) + "_" + i + Path.GetExtension(sound_path);//重命名文件
string newFolder = System.AppDomain.CurrentDomain.BaseDirectory + "NewSoundFiles/" + Path.GetFileNameWithoutExtension(sound_path) + "/";
//重新存储到一个新的文件目录
if (!System.IO.Directory.Exists(newFolder))
{
System.IO.Directory.CreateDirectory(newFolder);
}
string newFile = newFolder + fileName;
WaveFileWriter.CreateWaveFile16(newFile, trimed);
//绝对路径
string path_absolute = context.Server.MapPath("/NewSoundFiles/" + Path.GetFileNameWithoutExtension(sound_path) + "/" + fileName);
voiceFiles.Add(UploadFile.PostFile(path_absolute));
if (span == TimeSpan.FromSeconds(60))//音频大于60s
{
//小音频
var _reader = new AudioFileReader(sound_path);
var _trimed = _reader.Skip(startMilliSecond).Take(span);
//保存新的音频文件
string _fileName = "_" + Path.GetFileNameWithoutExtension(sound_path) + "_" + i + Path.GetExtension(sound_path);//重命名文件
string _newFile = newFolder + _fileName;
WaveFileWriter.CreateWaveFile16(_newFile, _trimed);
baidu_text.Add(BaiduSpeech.BaiduTranslateToText(_newFile, language, _trimed.WaveFormat.SampleRate.ToString()));
}
else
{
baidu_text.Add(BaiduSpeech.BaiduTranslateToText(newFile, language, trimed.WaveFormat.SampleRate.ToString()));
}
reader.Close();
reader.Dispose();
}
catch (Exception ex)
{
LogHelper.Error(ex.Message);
}
}
/// <summary>
/// 截取音频后，对每个小音频获语音转文字，一个音频对应一段文字
/// </summary>
/// <param name="startMilliSecond"></param>
/// <param name="endMilliSecond"></param>
/// <param name="reader"></param>
/// <param name="sound_path"></param>
/// <param name="_name"></param>
/// <param name="language"></param>
/// <param name="splitTime"></param>
private void GetBaiduSpeech(TimeSpan startMilliSecond, TimeSpan endMilliSecond, string sound_path, int i, string language, double splitTime)
{
string newFile = "";
string _newFile = "";
string pcm_newFile = "";
bool need_delete = true;
//将文件保存到新的文件夹（sound_path是原音频路径，newFolder是新的小音频路径，使用完成后将上传到服务器成功的音频删除）
string newFolder = System.AppDomain.CurrentDomain.BaseDirectory + "NewSoundFiles/" + Path.GetFileNameWithoutExtension(sound_path) + "/";
newFolder = newFolder.Replace("/", "\\");
AudioFileReader reader = new AudioFileReader(sound_path);
AudioFileReader _reader = null;//超过60s音频截取小音频
try
{
#region 为截取音频做准备
//开始时间往前取startMilliSecond一半的偏移，结束时间往后取间隔时间的一半的偏移
if (i == 0)
{
startMilliSecond = startMilliSecond - TimeSpan.FromMilliseconds(startMilliSecond.TotalMilliseconds / 2);
}
else
{
startMilliSecond = startMilliSecond - TimeSpan.FromMilliseconds(splitTime / 2);
}
if (endMilliSecond < reader.TotalTime)//最后一次不用取偏移
{
endMilliSecond = endMilliSecond + TimeSpan.FromMilliseconds(splitTime / 2);
}
TimeSpan span = endMilliSecond - startMilliSecond;
if (span.TotalSeconds > 60)//超过60s，只取50秒
{
span = TimeSpan.FromSeconds(50);
}
var trimed = reader.Skip(startMilliSecond).Take(endMilliSecond - startMilliSecond);
#endregion
string fileName = Path.GetFileNameWithoutExtension(sound_path) + "_" + i + Path.GetExtension(sound_path);//重命名文件
//重新存储到一个新的文件目录
if (!System.IO.Directory.Exists(newFolder))
{
System.IO.Directory.CreateDirectory(newFolder);
}
//拼接后的文件路径
newFile = newFolder + fileName;
//截取小音频文件
WaveFileWriter.CreateWaveFile16(newFile, trimed);
//上传到文件服务器
string server_path = UploadFile.PostFile(newFile);
if (Util.isNotNull(server_path))
{
//上传成功
voiceFiles.Add(server_path);
}
else
{
need_delete = false;
//上传失败,在服务器上的路径
voiceFiles.Add(Util.getServerPath() + "/NewSoundFiles/" + Path.GetFileNameWithoutExtension(sound_path) + "/" + fileName);
}
//大于60s的需要再处理
if (span == TimeSpan.FromSeconds(50))//音频大于60s,只截取50s
{
//小音频
_reader = new AudioFileReader(sound_path);
var _trimed = _reader.Skip(startMilliSecond).Take(span);
//保存新的音频文件
string _fileName = "_" + Path.GetFileNameWithoutExtension(sound_path) + "_" + i + ".pcm";//重命名文件
_newFile = newFolder + _fileName;
WaveFileWriter.CreateWaveFile16(_newFile, _trimed);
//将音频转换为文字
//baidu_text.Add(BaiduSpeech.BaiduTranslateToText(_newFile, language, _trimed.WaveFormat.SampleRate.ToString()));
baidu_text.Add(Rays.Utility.BadiAI.BaiduAI.BaiduTranslateToText(_newFile, language, trimed.WaveFormat.SampleRate.ToString()));
}
else
{
//将wav转换成pcm可以提高识别速度
pcm_newFile = NAudioHelper.GetPcmPath(newFile);
//将音频转换为文字
//baidu_text.Add(BaiduSpeech.BaiduTranslateToText(pcm_newFile, language, trimed.WaveFormat.SampleRate.ToString()));
baidu_text.Add(Rays.Utility.BadiAI.BaiduAI.BaiduTranslateToText(pcm_newFile, language, trimed.WaveFormat.SampleRate.ToString()));
}
}
catch (Exception ex)
{
LogHelper.Error("GetBaiduSpeech:" + ex.Message);
}
finally
{
reader.Close();
reader.Dispose();
if (_reader != null)
{
_reader.Close();
_reader.Dispose();
}
//删除文件
//if (File.Exists(_newFile))
//{
// File.Delete(_newFile);
//}
//if (need_delete)
//{
// if (File.Exists(newFile))
// {
// File.Delete(newFile);
// }
//}
////删除目录
//if (Directory.Exists(newFolder) && Directory.GetFiles(newFolder).Length == 0)
//{
// Directory.Delete(newFolder);
//}
//if (File.Exists(pcm_newFile))
//{
// File.Delete(pcm_newFile);
// string pcm_folder = Path.GetDirectoryName(pcm_newFile);
// //删除目录
// if (Directory.Exists(pcm_folder) && Directory.GetFiles(pcm_folder).Length == 0)
// {
// Directory.Delete(pcm_folder);
// }
//}
}
}
/// <summary>
/// 解析音频文件，获取时间戳，截取音频，语音转文字
/// </summary>
/// <param name="sound_path"></param>
/// <param name="word_path"></param>
/// <param name="language"></param>
/// <param name="splitTime"></param>
public void GetTimeSpanLrc(string sound_path, string word_path, string language, double splitTime = 1.5)
{
string sound_path_mp3 = ""; //音频格式转换后的文件
List <string> cut_sound_files = new List <string> (); //切分后的音频文件
string folder = Path.GetDirectoryName(sound_path);
try
{
if (sound_path.ToLower().EndsWith(".mp3"))
{
sound_path_mp3 = sound_path;
//通过NAudio将文件转换为WAV格式，返回新的文件路径
sound_path = NAudioHelper.GetWavPath(sound_path);
}
//音频处理，通过lrc的时间戳来截取音频与内容
//1.先从lrc里面获取时间戳与内容
if (Path.GetExtension(word_path).Contains("lrc"))
{
Dictionary <TimeSpan, string> lrcs = Util.ReadLrc(word_path);
List <TimeSpan> times = lrcs.Keys.ToList();
for (int i = 0; i < times.Count; i++)
{
TextContrastResult _result = new TextContrastResult();
//2.通过时间戳，截取音频
string cut_sound_file = folder + "\\" + i + "_" + sys.getRandomStr() + Path.GetExtension(sound_path);
TimeSpan _start = new TimeSpan();
TimeSpan _end = new TimeSpan();
if (i == times.Count - 1)
{
_end = TimeSpan.Parse(FfmpegHelper.getMediaDuration(sound_path));
}
else
{
_end = times[i + 1];
}
_start = times[i];
_result.timespan = times[i].TotalSeconds;
_result.contractText = lrcs[times[i]];
_result.baiduText = lrcs[times[i]];
_result.precent = "100%";
bool is_success = FfmpegHelper.CutAudioFile(sound_path, cut_sound_file, _start, _end - _start);
if (is_success)
{
cut_sound_files.Add(cut_sound_file);
}
//上传到服务器
if (File.Exists(cut_sound_file))
{
string server_path = UploadFile.PostFile(cut_sound_file);
_result.file_url = server_path;
}
results.Add(_result);
}
}
//原文
string _originalText = Util.ReadTxt(word_path);
originalText = string.Join("", _originalText.Split('|'));
}
catch (Exception ex)
{
LogHelper.Error(ex.Message);
}
finally
{
isFinish = true;
//删除切分的文件
foreach (string cut_sound_file in cut_sound_files)
{
if (Util.isNotNull(cut_sound_file) && File.Exists(cut_sound_file))
{
File.Delete(cut_sound_file);
}
}
//删除MP3文件
if (Util.isNotNull(sound_path_mp3) && File.Exists(sound_path_mp3))
{
File.Delete(sound_path_mp3);
string mp3_folder = Path.GetDirectoryName(sound_path_mp3);
if (Directory.Exists(mp3_folder) && Directory.GetFiles(mp3_folder).Length == 0)
{
Directory.Delete(mp3_folder);
}
}
//删除word文件
if (File.Exists(word_path))
{
File.Delete(word_path);
//删除word文件目录
string word_folder = Path.GetDirectoryName(word_path);
if (Directory.Exists(word_folder) && Directory.GetFiles(word_folder).Length == 0)
{
Directory.Delete(word_folder);
}
}
//删除文件夹，删除原音频文件
if (File.Exists(sound_path))
{
File.Delete(sound_path);
//删除原音频目录
string sound_folder = Path.GetDirectoryName(sound_path);
if (Directory.Exists(sound_folder) && Directory.GetFiles(sound_folder).Length == 0)
{
Directory.Delete(sound_folder);
}
}
}
}
/// <summary>
/// 音频合成（要注意音频顺序,只支持MP3格式）
/// </summary>
/// <param name="data">
/// [{"mp3":"xxxxxxxxx","topsize":0},{"mp3":"xxxxxxxxx","topsize":1},{"mp3":"xxxxxxxxx","topsize":2}
/// ,{"mp3":"xxxxxxxxx","topsize":3},{"mp3":"xxxxxxxxx","topsize":4}]
/// </param>
/// <returns></returns>
public ApiResult ComposeAudios(dynamic data)
{
ApiResult apiResult = new ApiResult();
List <string> local_mp3_list = new List <string>();
string output = "";
try
{
if (!Util.isNotNull(data))
{
return(new Models.ApiResult()
{
success = false,
message = "参数错误"
});
}
string folder = System.AppDomain.CurrentDomain.BaseDirectory + "download/";
//获取formdata数据
if (!System.IO.Directory.Exists(Path.GetDirectoryName(folder)))
{
System.IO.Directory.CreateDirectory(Path.GetDirectoryName(folder));
}
var _mp3 = new { mp3 = "", topsize = 0 };
List <dynamic> list = new List <dynamic>();
list.Add(_mp3);
dynamic[] _mp3_data_list = Newtonsoft.Json.JsonConvert.DeserializeAnonymousType(data.ToString(), list.ToArray());
var mp3_list = _mp3_data_list.OrderBy(o => o.topsize).Select(o => o.mp3);
string file_type = "";
foreach (var mp3 in mp3_list)
{
string mp3_file = mp3.ToString();
if (!Path.GetExtension(mp3_file).ToLower().Contains("mp3"))
{
return(new ApiResult()
{
success = false,
message = "只支持MP3格式的文件拼接"
});
}
file_type = Path.GetExtension(mp3.ToString());
string save_path = folder + Path.GetFileName(mp3.ToString());
string local_mp3 = UploadFile.DownloadFile(save_path.Replace("/", "\\"), mp3.ToString()).Result;
local_mp3_list.Add(local_mp3);
}
output = folder + sys.getRandomStr() + "_output" + file_type;
if (FfmpegHelper.ComposeAudios(local_mp3_list.ToArray(), ref output))
{
apiResult.data = UploadFile.PostFile(output);
apiResult.success = true;
apiResult.message = "合成成功";
}
else
{
return(new ApiResult()
{
success = false,
message = "合成失败"
});
}
}
catch (Exception ex)
{
return(new ApiResult()
{
success = false,
message = ex.Message
});
}
finally
{
if (local_mp3_list.Count > 0)
{
foreach (string mp3 in local_mp3_list)
{
File.Delete(mp3);
}
}
if (Util.isNotNull(output))
{
File.Delete(output);
}
}
return(apiResult);
}
public ApiResult speechEvaluation()
{
ApiResult apiResult = new ApiResult();
string speechFilePath = string.Empty;
string silkFile = string.Empty;
string otherFile = string.Empty;
try
{
string fileName = sys.getRandomStr();//用作最终生成的文件名
List <string> speechResult = null;
//接受小程序提交过来的录音文件
System.Web.HttpFileCollection fileList = HttpContext.Current.Request.Files;
string enText = HttpContext.Current.Request.Form["enText"];
string lan = HttpContext.Current.Request.Form["language"];
enText = enText.Replace("\n", "").Replace("\r", "");
if (fileList.Count < 1)
{
return(new ApiResult()
{
success = false, message = "语音文件为空"
});
}
System.Web.HttpPostedFile file = fileList[0];
//判断文件是silk格式还是webm格式，不能通过文件后缀判断
StreamReader reader = new StreamReader(file.InputStream);
string fileString = reader.ReadToEnd();
BaiduAI ai = new BaiduAI();
if (fileString.IndexOf("SILK_V3") > -1)
{
//silk格式文件
silkFile = CommonServices.createFileFullPath("silk");
file.SaveAs(silkFile);
speechFilePath = CmdServices.silk2wav(silkFile);
string fileType = CommonServices.getFileType(speechFilePath);
//speechResult = ai.AsrData(speechFilePath, fileType, 16000, lan);
FileInfo file_info = new FileInfo(speechFilePath);
speechResult = Util.GetSpeechResult(file_info, lan);
}
else if (fileString.IndexOf("webm") > -1)
{
#region
//webm格式文件
//微信小程序webm格式录音文件，data:audio/webm;base64,GkXfo59ChoEBQv...
//1.去掉data:audio/webm;base64,
//2.对GkXfo59ChoEBQv...字符串解码为webm文件
//3.webm文件转wav文件
#endregion
LogHelper.Info("小程序音频评分开始：" + DateTime.Now);
fileString = fileString.Substring(fileString.IndexOf(',') + 1);
byte[] bytes = Convert.FromBase64String(fileString);
string webmFile = CommonServices.createFileFullPath("webm");
using (FileStream fs = new FileStream(webmFile, FileMode.Create, FileAccess.Write))
{
fs.Write(bytes, 0, bytes.Length);
fs.Flush();
}
speechFilePath = CmdServices.webm2wav(webmFile);
string fileType = CommonServices.getFileType(speechFilePath);
//speechResult = ai.AsrData(speechFilePath, fileType, 16000, lan);
LogHelper.Info("小程序音频评分结束：" + DateTime.Now);
FileInfo file_info = new FileInfo(speechFilePath);
speechResult = Util.GetSpeechResult(file_info, lan);
}
else//mp3或者wav，如果不是16000HZ，16bit，单声道，都转格式
{
string fileType = CommonServices.getFileType(file.FileName);
otherFile = CommonServices.createFileFullPath(fileType);
file.SaveAs(otherFile);
//转换成wav\
LogHelper.Info("MP3转wav");
string mp3_folder = HttpContext.Current.Server.MapPath("/upload/") + sys.getDateStr() + "\\";
if (Directory.Exists(mp3_folder))
{
Directory.CreateDirectory(mp3_folder);
}
speechFilePath = mp3_folder + sys.getRandomStr() + ".wav";
//speechFilePath = CmdServices.mp32wav(otherFile);
FfmpegHelper.ChangeFileType(otherFile, speechFilePath);
LogHelper.Info("百度转语音开始");
//speechResult = ai.AsrData(speechFilePath, CommonServices.getFileType(speechFilePath), 16000, lan);
FileInfo file_info = new FileInfo(speechFilePath);
speechResult = Util.GetSpeechResult(file_info, lan);
}
string duration = FileServices.getMediaDuration(speechFilePath);
int seconds = SppechEvaluation.timeToSecond(duration);
//评分
int totalSocre = 0;
int accuracySocre = 0;
int fluencySocre = 0;
int integritySocre = 0;
int tempScore = 0;
string sentence = "";
//LogHelper.Info("百度转语音完成，准备计算分数。seconds：" + seconds+";count:"+ speechResult.Count);
if (speechResult == null)
{
sentence = SppechEvaluation.getSentenceAccuracy3(enText, speechResult);
apiResult.data = new { totalSocre, accuracySocre, fluencySocre, integritySocre, speechFilePath = UploadFile.PostFile(speechFilePath), sentence };
}
else
{
//开始计算得分
for (int i = 0; i < speechResult.Count; i++)
{
if (lan == "zh")
{
char[] words = SppechEvaluation.getSentenceWordsZh(speechResult[i]);
tempScore = SppechEvaluation.calaAccuracySocre(enText, words);
if (tempScore > accuracySocre)
{
accuracySocre = tempScore;
}
tempScore = SppechEvaluation.calaFluencySocreZh(enText, seconds);
if (tempScore > fluencySocre)
{
fluencySocre = tempScore;
}
tempScore = SppechEvaluation.calaIntegritySocre(enText, words, accuracySocre);
if (tempScore > integritySocre)
{
integritySocre = tempScore;
}
sentence = SppechEvaluation.getSentenceAccuracyZh(enText, speechResult);
}
else
{
string[] words = SppechEvaluation.getSentenceWords(speechResult[i]);
//accuracySocre、fluencySocre、integritySocre取平均分，totalSocre取accuracySocre最高分
tempScore = SppechEvaluation.calaAccuracySocre(enText, words);
if (tempScore > accuracySocre)
{
accuracySocre = tempScore;
}
tempScore = SppechEvaluation.calaFluencySocre(enText, seconds);
if (tempScore > fluencySocre)
{
fluencySocre = tempScore;
}
tempScore = SppechEvaluation.calaIntegritySocre(enText, words, accuracySocre);
if (tempScore > integritySocre)
{
integritySocre = tempScore;
}
sentence = SppechEvaluation.getSentenceAccuracy2(enText, speechResult);
}
}
totalSocre = (int)((float)(accuracySocre * 60 + fluencySocre * 20 + integritySocre * 20) / 100);
if (speechResult.Count == 0)
{
sentence = SppechEvaluation.getSentenceAccuracy3(enText, speechResult);
}
//return "{\"success\":true,\"message\":\"\",\"data\":{\"totalSocre\":\"" + totalSocre + "\",\"accuracySocre\":\"" + accuracySocre + "\",\"fluencySocre\":\"" + fluencySocre + "\",\"integritySocre\":\"" + integritySocre + "\",\"speechFilePath\":\"" + FileServices.urlConvertor(speechFilePath) + "\",\"speechSeconds\":\"" + seconds.ToString() + "\",\"sentence\":" + sentence + "}}";
apiResult.data = new { totalSocre, accuracySocre, fluencySocre, integritySocre, speechFilePath = UploadFile.PostFile(speechFilePath), speechSeconds = seconds.ToString(), sentence };
}
apiResult.success = true;
apiResult.message = "获取成功";
}
catch (Exception ex)
{
return(new ApiResult()
{
success = false,
message = ex.Message
});
}
finally
{
//删掉服务器上的文件
if (Util.isNotNull(speechFilePath))
{
if (File.Exists(speechFilePath))
{
File.Delete(speechFilePath);
}
}
if (Util.isNotNull(silkFile))
{
if (File.Exists(silkFile))
{
File.Delete(silkFile);
}
}
if (Util.isNotNull(otherFile))
{
if (File.Exists(otherFile))
{
File.Delete(otherFile);
}
}
}
return(apiResult);
}
public ApiResult CutAudio()
{
ApiResult apiResult = new Models.ApiResult();
List <string> output_list = new List <string>();
string input = string.Empty;
try
{
Dictionary <string, string> cut_files = new Dictionary <string, string>();
HttpFileCollection fileList = HttpContext.Current.Request.Files;
if (fileList.Count < 1)
{
return(new ApiResult()
{
success = false, message = "文件为空"
});
}
HttpPostedFile file = fileList[0];
string folder = System.AppDomain.CurrentDomain.BaseDirectory + "NewSoundFiles/";
if (!System.IO.Directory.Exists(Path.GetDirectoryName(folder)))
{
System.IO.Directory.CreateDirectory(Path.GetDirectoryName(folder));
}
//先保存文件
input = folder + "cutAudio_" + sys.getRandomStr() + Path.GetExtension(file.FileName);
input = input.Replace("/", "\\");
file.SaveAs(input);
string timespans = HttpContext.Current.Request.Form["timespans"];
string[] times = timespans.Split(new char[] { ',', '，' }, StringSplitOptions.RemoveEmptyEntries);
string start = "";
string end = "";
List <string> cut_times = new List <string>();
foreach (string time in times)
{
if (Util.isNotNull(time))
{
cut_times.Add(time);
}
}
//没有结束时间，所以需要加上
string _all_audio_time = FfmpegHelper.getMediaDuration(input);
string[] all_audio_times = _all_audio_time.Split(':');
string audio_times = (int.Parse(all_audio_times[0]) * 3600 + int.Parse(all_audio_times[1]) * 60 + double.Parse(all_audio_times[2])).ToString();
cut_times.Add(audio_times);
//确保没有空数据
if (cut_times.Count > 1)
{
for (int i = 1; i < cut_times.Count; i++)
{
try
{
start = cut_times[i - 1];
TimeSpan _start = TimeSpan.FromSeconds(double.Parse(start));
end = cut_times[i];
TimeSpan _end = TimeSpan.FromSeconds(double.Parse(end) - double.Parse(start));
string output = folder + i + "_cutAudio_" + sys.getRandomStr() + Path.GetExtension(file.FileName);
output = output.Replace("/", "\\");
output_list.Add(output);
bool is_success = FfmpegHelper.CutAudioFile(input, output, _start, _end);
//上传到服务器
if (File.Exists(output))
{
string server_path = UploadFile.PostFile(output);
cut_files.Add(start, server_path);
}
}
catch (Exception ex)
{
return(new ApiResult()
{
success = false,
message = "timespans参数不对"
});
}
}
apiResult.success = true;
apiResult.message = "截取成功";
apiResult.data = cut_files;
}
else
{
return(new ApiResult()
{
success = false,
message = "timespans参数不对"
});
}
}
catch (Exception ex)
{
return(new ApiResult()
{
success = false,
message = ex.Message
});
}
finally
{
if (Util.isNotNull(input))
{
if (File.Exists(input))
{
File.Delete(input);
}
}
foreach (string file in output_list)
{
if (Util.isNotNull(file))
{
if (File.Exists(file))
{
File.Delete(file);
}
}
}
}
return(apiResult);
}
/// <summary>
/// 截取音频后，对每个小音频获语音转文字，一个音频对应一段文字
/// </summary>
/// <param name="startMilliSecond"></param>
/// <param name="endMilliSecond"></param>
/// <param name="reader"></param>
/// <param name="sound_path"></param>
/// <param name="_name"></param>
/// <param name="language"></param>
/// <param name="splitTime"></param>
private void GetBaiduSpeech(TimeSpan startMilliSecond, TimeSpan endMilliSecond, string sound_path, int i, string language, double splitTime, TimeSpan totalTime
, int channel, int rate, int bit)
{
string newFile = "";
string _newFile = "";
bool need_delete = true;
//将文件保存到新的文件夹（sound_path是原音频路径，newFolder是新的小音频路径，使用完成后将上传到服务器成功的音频删除）
string newFolder = System.AppDomain.CurrentDomain.BaseDirectory + "NewSoundFiles/" + Path.GetFileNameWithoutExtension(sound_path) + "/";
try
{
#region 为截取音频做准备
//开始时间往前取startMilliSecond一半的偏移，结束时间往后取间隔时间的一半的偏移
if (i == 0)
{
startMilliSecond = startMilliSecond - TimeSpan.FromMilliseconds(startMilliSecond.TotalMilliseconds / 2);
}
else
{
startMilliSecond = startMilliSecond - TimeSpan.FromMilliseconds(splitTime / 2);
}
if (endMilliSecond < totalTime)//最后一次不用取偏移
{
endMilliSecond = endMilliSecond + TimeSpan.FromMilliseconds(splitTime / 2);
}
TimeSpan span = endMilliSecond - startMilliSecond;
#endregion
string fileName = Path.GetFileNameWithoutExtension(sound_path) + "_" + i + Path.GetExtension(sound_path);//重命名文件
//重新存储到一个新的文件目录
if (!System.IO.Directory.Exists(newFolder))
{
System.IO.Directory.CreateDirectory(newFolder);
}
//拼接后的文件路径
newFile = newFolder + fileName;
if (!FfmpegHelper.CutAudioFile(sound_path, newFile, startMilliSecond, span))
{
LogHelper.Error("第" + i + "次音频截取失败");
return;
}
//上传到文件服务器
string server_path = UploadFile.PostFile(newFile);
if (Util.isNotNull(server_path))
{
//上传成功
voiceFiles.Add(server_path);
}
else
{
need_delete = false;
//上传失败,在服务器上的路径
voiceFiles.Add(Util.getServerPath() + "/NewSoundFiles/" + Path.GetFileNameWithoutExtension(sound_path) + "/" + fileName);
}
//大于60s的需要再处理
if (span.TotalSeconds >= 60)//音频大于60s,只截取50s
{
span = TimeSpan.FromSeconds(50);
//保存新的音频文件
string _fileName = "_" + Path.GetFileNameWithoutExtension(sound_path) + "_" + i + ".wav";//重命名文件
_newFile = newFolder + _fileName;
//截取音频
if (!FfmpegHelper.CutAudioFile(sound_path, _newFile, startMilliSecond, span))
{
LogHelper.Error("第" + i + "次音频截取失败");
return;
}
//转成pcm
//将音频转换为文字
baidu_text.Add(Rays.Utility.BadiAI.BaiduAI.BaiduTranslateToText(_newFile, language, rate.ToString()));
}
else
{
//将音频转换为文字
baidu_text.Add(Rays.Utility.BadiAI.BaiduAI.BaiduTranslateToText(newFile, language, rate.ToString()));
}
}
catch (Exception ex)
{
LogHelper.Error("GetBaiduSpeech:" + ex.Message);
}
finally
{
//删除文件
if (File.Exists(_newFile))
{
File.Delete(_newFile);
}
if (need_delete)
{
if (File.Exists(newFile))
{
File.Delete(newFile);
}
}
//删除目录
if (Directory.Exists(newFolder) && Directory.GetFiles(newFolder).Length == 0)
{
Directory.Delete(newFolder);
}
}
}