Re: [pygame] pygame.sndarray.array = ValueError: string size must be a multiple of element size

[B W <stabbingfinger@xxxxxxxxx>]

Ask and ye shall receive. Here are a couple publicly available files that demonstrate what appear to be two different problems with sndarray in the blessed Pygame example.

WAV http://www.freesound.org/samplesViewSingle.php?id=4359 blows up on line 88, "ValueError: shape mismatch: objects cannot be broadcast to a single shape". This one kinda surprised me.

OGG http://www.freesound.org/samplesViewSingle.php?id=32083 blows up on line 108, "ValueError: buffer size must be a multiple of element size".

Gumm

On Fri, Aug 6, 2010 at 10:28 AM, Lenard Lindstrom <len-l@xxxxxxxxx> wrote:

I don't know. Try the sndarray example:

python -m pygame.examples.sound_array_demos

Otherwise there is something different about your sound files. Without an example that causes the problem there is nothing I can do.

Lenard

On 05/08/10 03:45 PM, B W wrote:

Thanks for responding, Lenard, though it doesn't seem this applies to my problem. The sound file is loaded successfully. I can play() the loaded sound just fine. It is the conversion of the mixer.Sound object to a sndarray.array object that's blowing up.

Gumm

On Thu, Aug 5, 2010 at 12:26 PM, Lenard Lindstrom <len-l@xxxxxxxxx <mailto:len-l@xxxxxxxxx>> wrote:

   Okay, this is technically not a bug. If the string is not a valid
   file path then it is assumed to be sound data. This has to be
   fixed somehow.

   Lenard


   On 05/08/10 11:36 AM, Lenard Lindstrom wrote:

        Hi Gumm,

       You have found a bug. pygame.mixer.Sound does handle
       ogg/vorbis files. But it doesn't raise an exception when it
       can't find the file. Also, on Windows you may find that
       calling pygame.init() before pygame.mixer.init() will prevent
       playback, no sound. Either remove pygame.init, place it after
       pygame.mixer.init or set the SDL_AUDIODRIVER environment
       variable to 'waveout'.

       Lenard Lindstrom

       On 03/08/10 11:03 AM, B W wrote:

           Howdy, folks.

           Seeking enlightenment. Anyone seen this before, and how do
           I rassle it into submission? Docs and web have been
           unhelpful so far. I'm using pre-built software packages;
           been using these for months without any issues.

           This problem occurs with all ogg and wav files. I see that
           Numpy is raising the exception, but I can't tell if it's a
           problem internal to Numpy or a result of how
           numpysnd.array is using Numpy.

           Summary:
           1. load OGG-Vorbis sound file with pygame.mixer.Sound
           2. convert sound using pygame.sndarray.array
           3. scratch head

           <CODE>
           import os, sys, numpy, pygame
           from pygame.locals import *
           pygame.init()
           pygame.mixer.init(44100, 16, 2, 1)
           sound = pygame.mixer.Sound('../sounds/laser_26667.ogg')
           for n,v in [('OS',os.name <http://os.name>
           <http://os.name>),('Python',sys.version),('Pygame',pygame.version.vernum),

              ('Numpy',numpy.version.version),('Array
           type',pygame.sndarray.get_arraytype())]:
              print '%s: %s' % (n,v)
           sound_data = pygame.sndarray.array(sound)
           </CODE>

           C:/Python26/pythonw.exe -u
            "C:/cygwin/home/Gumm/devel/python/project/gummball/blah.py"
           OS: nt
           Python: 2.6.5 (r265:79063, Mar 20 2010, 14:22:52) [MSC
           v.1500 32 bit (Intel)]
           Pygame: (1, 9, 1)
           Numpy: 1.4.1
           Array type: numpy
           Traceback (most recent call last):
            File
           "C:/cygwin/home/Gumm/devel/python/project/gummball/blah.py",
           line 9, in <module>
              sound_data = pygame.sndarray.array(sound)
            File "C:\Python26\Lib\site-packages\pygame\sndarray.py",
           line 95, in array
              return numpysnd.array (sound)
            File
           "C:\Python26\Lib\site-packages\pygame\_numpysndarray.py",
           line 77, in array
              return _array_samples(sound, True)
            File
           "C:\Python26\Lib\site-packages\pygame\_numpysndarray.py",
           line 64, in _array_samples
              array = numpy.fromstring (data, typecode)
           ValueError: string size must be a multiple of element size

           Any assistance appreciated.

           Gumm