title: Problems with Python Wand and paths to JXR imagery when attempting to convert JXR imagery to JPG format?
body: <p>I need to be able to convert JPEG-XR images to JPG format, and have gotten this working through ImageMagick itself. However, I need to be able to do this from a python application, and have been looking at using Wand.
  Wand does not seem to properly use paths to JXR imagery.</p>
  
  <pre><code>with open(os.path.join(args.save_location, img_name[0], result[0]+".jxr"), "wb") as output_file:
      output_file.write(result[1])
      with Image(filename=os.path.join(args.save_location, img_name[0], result[0]+".jxr")) as original:
          with original.convert('jpeg') as converted:
              print(converted.format)
              pass
  </code></pre>
  
  <p>The first part of this - creating output_file and writing result[1] (blob of JXR imagery from a SQLite database) - works fine. However, when I attempt to then open that newly-saved file as an image using Python and Wand, I get an error that ultimately suggests Wand is not looking in the correct location for the image:</p>
  
  <pre><code>    Extracting panorama 00000
  FAILED: -102=pWS-&gt;Read(pWS, szSig, sizeof(szSig))
          JXRGlueJxr.c:1806
  FAILED: -102=ReadContainer(pID)
          JXRGlueJxr.c:1846
  FAILED: -102=pDecoder-&gt;Initialize(pDecoder, pStream)
          JXRGlue.c:426
  FAILED: -102=pCodecFactory-&gt;CreateDecoderFromFile(args.szInputFile, &amp;pDecoder)
          e:\coding\python\sqlite panoramic image extraction tool\jxrlib\jxrencoderdecoder\jxrdecapp.c:477
  
  JPEG XR Decoder Utility
  Copyright 2013 Microsoft Corporation - All Rights Reserved
  
  ... [it outputs its help page in case of errors; snipped]
  
  The system cannot find the file specified.
  Traceback (most recent call last):
    File "E:\Coding\Python\SQLite Panoramic Image Extraction Tool\SQLitePanoramicImageExtractor\trunk\PanoramicImageExtractor.py", line 88, in &lt;module&gt;
      with Image(filename=os.path.join(args.save_location, img_name[0], result[0]+".jxr")) as original:
    File "C:\Python34\lib\site-packages\wand\image.py", line 1991, in __init__
      self.read(filename=filename, resolution=resolution)
    File "C:\Python34\lib\site-packages\wand\image.py", line 2048, in read
      self.raise_exception()
    File "C:\Python34\lib\site-packages\wand\resource.py", line 222, in raise_exception
      raise e
  wand.exceptions.BlobError: unable to open image `C:/Users/RPALIW~1/AppData/Local/Temp/magick-14988CnJoJDwMRL4t': No such file or directory @ error/blob.c/OpenBlob/2674
  </code></pre>
  
  <p>As you can see at the very end, it seems to have attempted to run off to open a temporary file 'C:/Users/RPALIW~1/AppData/Local/Temp/magick-14988CnJoJDwMRL4'. The filename used at this point should be exactly the same as the filename used to save the imagery as a file just a few lines above, but Wand has substituted something else? This looks similar to the last issue I had with this in ImageMagick, which was fixed over the weekend (detailed here: <a href="http://www.imagemagick.org/discourse-server/viewtopic.php?f=1&amp;t=27027&amp;p=119702#p119702" rel="nofollow">http://www.imagemagick.org/discourse-server/viewtopic.php?f=1&amp;t=27027&amp;p=119702#p119702</a>).</p>
  
  <p>Has anyone successfully gotten Wand to open JXR imagery as an Image in Python, and convert to another format? Am I doing something wrong here, or is the fault with ImageMagick or Wand?</p>