api - IBM Speech中的curl “Unsupported Media Type”错误

Question

我当前在终端中使用此命令尝试以8 kHz采样率将16 bps的telephonic mono voice sample wav转录到IBM Speech-to-Text引擎。

curl -X POST \
-u "apikey goes here" \
--header "Content-Type: audio/wav", "model: en-US_NarrowbandModel" \
--data-binary @{path_url_goes_here)/OSR_us_000_0010_8k.wav \
"https://stream.watsonplatform.net/speech-to-text/api/v1/recognize"

但是，输出指出不支持输入wav:

 curl: (3) Port number ended with ' '
{
   "code_description": "Unsupported Media Type", 
   "code": 415, 
   "error": "Unable to transcode from audio/wav, to one of: audio/x-float-array; rate=16000; channels=1, application/srgs, application/srgs+xml, application/jsgf, application/fsm, application/bnf"
}

根据IBM supported audio format list，我已将模型更改为“NarrowbandModel”，以允许如上所述的最小输入采样率为8 kHz。

我的问题:
我的请求或音频文件有问题吗？

更新:我尝试将.wav转换为恒定的8和48 kHz采样率的MP3格式。更改为“Content-Type:音频/ mp3”后，也会产生与上述相同的输出。

Answer 1

尝试在网址中传递model = en-US_NarrowbandModel作为参数。以下curl命令对您的wav文件适用于我。

curl -X POST \
-u "apikey:XXXXXXXXXXXXXXXXXXXXXXXXXXXXX" \
-H "Content-Type:audio/wav" \
--data-binary @OSR_us_000_0010_8k.wav \
"https://stream.watsonplatform.net/speech-to-text/api/v1/recognize?model=en-US_NarrowbandModel"

{
 "results": [
  {
     "alternatives": [
        {
           "confidence": 0.985, 
           "transcript": "the birch canoes slid on the smooth planks "
        }
     ], 
     "final": true
  },