title: AVMetadataObjectTypePDF417Code don't return the entire string
body: <p>I'm trying to read a pdf417 code with apple library AVMetadataObjectTypePDF417Code but this returned me a incomplete chain. For example the result should be:</p>
  
  <pre><code>11111111K9190909 MORAL��������������������������������������������������FTV150320A02013100411 ������Ä������PC1‘tw@= Ü·ryÀvxØpuªw{Özwìit¯€znp‡Htg‰wˆæbp¨…€úm ÒŠte„‡õ^p ‚dqw åo\‡ |x’w\U‚½Si¥™|ieS‡› n Oðœ‡ƒSZ› }V‘™ø Kv¢…v¤zÒ§vÚBh©¨ \¤aã– v”¤ú™NíA Áª„fB\ Ÿœ¯‚Xp³éCRŸ¯‹‚‚9y7a¢³‡v6^ ±Yè´ †i»æ»râŠ½t¯Kp½„ä½‡Z=EABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnop
  </code></pre>
  
  <p>but i get only: <code>11111111K9190909 MORAL</code></p>
  
  <p>I think that the middle has another coding(<code>��������������������������������������������������</code>) therefore, cut the string and not handing me the rest.</p>
  
  <p>do you know?, if there is any option to hand me the complete code although the middle part is unreadable. </p>