Microsoft.CognitiveServices.Speech.DetailedSpeechRecognitionResultCollection错误

Question

我们正在使用Microsoft认知服务进行语音转文本的实验。我们的要求之一是拥有字级时间戳。这对于短的wav文件（例如2-3分钟的音频）可以正常工作，但是对于较大的文件，我们会出现错误：“在反序列化类型Microsoft.CognitiveServices.Speech.DetailedSpeechRecognitionResultCollection的对象时发生错误。无法将值'2152200000'解析为类型'Int32'。”

关于我如何解决这个问题的任何暗示将不胜感激。预先感谢！

代码段：

    config.OutputFormat = OutputFormat.Detailed;
    config.RequestWordLevelTimestamps();

    using (var audioInput = AudioConfig.FromWavFileInput(wavfile))
    {
        using var recognizer = new SpeechRecognizer(config, audioInput);

        recognizer.Recognized += (s, e) =>
        {
            if (e.Result.Reason == ResultReason.RecognizedSpeech)
            {
                var framesStart = TimeSpan.FromTicks(e.Result.OffsetInTicks).TotalMilliseconds / 40;
                var te = new TranscriptElement((long)framesStart, e.Result.Text, languageCode);
                // Eventually fails on the following line:
                var words = e.Result.Best().OrderByDescending(x => x.Confidence).First().Words;
                foreach (var w in words.OrderBy(w => w.Offset))
                {
                    var start = TimeSpan.FromTicks(w.Offset).TotalMilliseconds / 40;
                    var duration = TimeSpan.FromTicks(w.Duration).TotalMilliseconds / 40;
                    te.SingleWords.Add(new TranscriptSingleWord((long)start, (long)(start + duration), w.Word));
                }

                transcriptElements.Add(te);
            }
            else if (e.Result.Reason == ResultReason.NoMatch)
            {
                _logger.LogError($"NOMATCH: Speech could not be recognized.");
            }
        };
        await recognizer.StartContinuousRecognitionAsync().ConfigureAwait(false);

        Task.WaitAny(new[] { stopRecognition.Task });

        await recognizer.StopContinuousRecognitionAsync().ConfigureAwait(false);
    }

Answer 1

这是扩展名用于偏移量的数据类型中的错误。一个int只能跟踪约214s的音频。

您可以通过SpeechServiceResponse_JsonResult属性从结果的属性集合中访问Best（）方法正在使用的原始JSON，直到有可用的修复程序为止。