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• Google Speech Recognition API output errors, unsure why they're occuring

  8 novembre 2019, par Requiem_7

  This is the output for when I feed flac files into Google’s Speech Recognition API. It says that if starts and finishes most of the files but then it gives me these errors when it nears the end. I have checked and all these files are native flac files. I took out a good chunk of the output above "source/out70.flac started" becuase it’s all the same besides the file number.

  source/out70.flac started
  
  source/out25.flac started
  
  source/out17.flac done
  
  source/out18.flac started
  
  source/out25.flac done
  
  source/out20.flac done
  
  source/out21.flac started
  
  source/out10.flac done
  
  source/out100.flac started
  
  source/out14.flac done
  
  source/out18.flac done
  
  source/out21.flac done
  
  Traceback (most recent call last):
  
    File "C:\Users\hmkur\AppData\Roaming\Python\Python37\site-packages\speech_recognition\__init__.py", line 203, in __enter__
  
      self.audio_reader = wave.open(self.filename_or_fileobject, "rb")
  
    File "C:\Program Files (x86)\Python37-32\lib\wave.py", line 510, in open
  
      return Wave_read(f)
  
    File "C:\Program Files (x86)\Python37-32\lib\wave.py", line 164, in __init__
  
      self.initfp(f)
  
    File "C:\Program Files (x86)\Python37-32\lib\wave.py", line 129, in initfp
  
      self._file = Chunk(file, bigendian = 0)
  
    File "C:\Program Files (x86)\Python37-32\lib\chunk.py", line 63, in __init__
  
      raise EOFError
  
  EOFError
  
  
  
  During handling of the above exception, another exception occurred:
  
  
  
  Traceback (most recent call last):
  
    File "C:\Users\hmkur\AppData\Roaming\Python\Python37\site-packages\speech_recognition\__init__.py", line 208, in __enter__
  
      self.audio_reader = aifc.open(self.filename_or_fileobject, "rb")
  
    File "C:\Program Files (x86)\Python37-32\lib\aifc.py", line 917, in open
  
      return Aifc_read(f)
  
    File "C:\Program Files (x86)\Python37-32\lib\aifc.py", line 352, in __init__
  
      self.initfp(file_object)
  
    File "C:\Program Files (x86)\Python37-32\lib\aifc.py", line 314, in initfp
  
      chunk = Chunk(file)
  
    File "C:\Program Files (x86)\Python37-32\lib\chunk.py", line 63, in __init__
  
      raise EOFError
  
  EOFError
  
  
  
  During handling of the above exception, another exception occurred:
  
  
  
  Traceback (most recent call last):
  
    File "C:\Users\hmkur\AppData\Roaming\Python\Python37\site-packages\speech_recognition\__init__.py", line 234, in __enter__
  
      self.audio_reader = aifc.open(aiff_file, "rb")
  
    File "C:\Program Files (x86)\Python37-32\lib\aifc.py", line 917, in open
  
      return Aifc_read(f)
  
    File "C:\Program Files (x86)\Python37-32\lib\aifc.py", line 358, in __init__
  
      self.initfp(f)
  
    File "C:\Program Files (x86)\Python37-32\lib\aifc.py", line 314, in initfp
  
      chunk = Chunk(file)
  
    File "C:\Program Files (x86)\Python37-32\lib\chunk.py", line 63, in __init__
  
      raise EOFError
  
  EOFError
  
  
  
  During handling of the above exception, another exception occurred:
  
  
  
  Traceback (most recent call last):
  
    File "C:\Users\hmkur\Desktop\Python\Transcribing_Audio_GoogleAPI_Python\fast.py", line 92, in <module>
  
      all_text = pool.map(transcribe, enumerate(files))
  
    File "C:\Program Files (x86)\Python37-32\lib\multiprocessing\pool.py", line 268, in map
  
      return self._map_async(func, iterable, mapstar, chunksize).get()
  
    File "C:\Program Files (x86)\Python37-32\lib\multiprocessing\pool.py", line 657, in get
  
      raise self._value
  
    File "C:\Program Files (x86)\Python37-32\lib\multiprocessing\pool.py", line 121, in worker
  
      result = (True, func(*args, **kwds))
  
    File "C:\Program Files (x86)\Python37-32\lib\multiprocessing\pool.py", line 44, in mapstar
  
      return list(map(*args))
  
    File "C:\Users\hmkur\Desktop\Python\Transcribing_Audio_GoogleAPI_Python\fast.py", line 82, in transcribe
  
      with sr.AudioFile(name) as source:
  
    File "C:\Users\hmkur\AppData\Roaming\Python\Python37\site-packages\speech_recognition\__init__.py", line 236, in __enter__
  
      raise ValueError("Audio file could not be read as PCM WAV, AIFF/AIFF-C, or Native FLAC; check if file is corrupted or in another format")
  
  ValueError: Audio file could not be read as PCM WAV, AIFF/AIFF-C, or Native FLAC; check if file is corrupted or in another format
  
  </module>

• Compress video with ffmpeg programatically - i.e. using C libraries instead of command line or wrapper

  29 décembre 2014, par Mick

  I am trying to find some examples or guidelines that help show how to compress a video programatically using ffmpeg API’s (i.e. the C API’s not the command line).

  In other words I would like to achieve the equivalent of the following ffmpeg command line :

  ffmpeg -i inoutVideo.mp4 -strict experimental -acodec aac CompressedVideo_aac.mp4

  but using the appropriate API calls from a C program.

  I can already do this by creating a wrapper around the ’ffmpeg.c’ program but I am trying to understand how to achieve this with the C libraries directly.

  I realise I can simply(!) read the source code of ffmpeg.c to see what it does, but I was hoping for something that either provides and overview or a specific example for video compression.

  Any pointers gratefully appreciated.

• Can OpenCV handle the error when ffmpeg fails ?

  12 décembre 2015, par wking

  I am using CV::VideoCapture to capture frames from an IP camera. It works most of time, however, sometimes it reports the error :

  [mjpeg @ 0x233aea0] overread 8

  And when this error occurred, my program just stuck there. This might explain why. But how can I solve it in C++ code ? Can OpenCV handle this error without terminate the program ?

  p.s. I found that if I didn’t call CV::VideoCapture::read() immediately, but wait for a while, like 60 seconds, after CV::VideoCapture::open(), this error occurred everytime ! Is it a bug of OpenCV ?