The binary encoding of an image, like PNG, is NOT UTF-8. I am getting errors trying to encode a PNG and serialize it to protobuf. Please see a copy of my stack overflow question below.
How do I do this in Python if I can only use UTF-8 but images are not UTF-8? 0down votefavorite <https://stackoverflow.com/questions/48193722/python-protobuf-encode-png#> I have a protobuf field of type bytes I am trying to do: b = open("apng.png", "rb").read() msg2.imagebinary = b msg2b = msg2.SerializeToString() However I get the error: ValueError: b'\x89PNG\r\n\x1a\n\x00\x00\x00\rIHDR\x00\x00\x00\xac\x00\x00\x00\xaa\x08\x06\x00\x00\x000h\xa4\xc5\x00\x00\x0c%iCCPICC Profile\x00\x00H\x89\x95\x97\x07TSI\x17\xc7\xe7\x95$$$\xb4@(RBo"M\xba\xf4\x1a@@\xaa`#$\x81\x84\x12C \xa8\xd8\xd1E\x05\xd7\x82\x88\x08VtU\xc4\xb6\x16@\x16\x15\xb1\x97E\xb0\xf7\x05\x11\x15e],\xd8P\xf9&\x05t\xdd\xaf\x9c\xef\x9e3\xef\xfd\xce}w\xee\xfc\xef\xbcys\xde\x00\xa0\x1a\xc3\x16\x89\xb2Q5\x00r\x84\xf9\xe2\xd8\xd0\x00\xe6\xc4\xe4\x14&\xe9\x11@\x00\n\xc8\xb0\xe9\xb39y"\xff\x98\x98H\x00m\xf8\xfew{w\x13FC\xbbf\'\xcd\xf5\xcf\xe7\xff\xd5\xd4\xb9\xbc<\x0e\x00H\x0c\xe44n\x1e\'\x07\xf2a\x00pW\x8eH\x9c\x0f\x00\xa1\x0f\xfaMg\xe4\x8b \x13\xa1J\xa0)\x86\x02!\x9bI9C\xce\xeeRN\x93s\xa4,&>6\x10r*\x00JT6[\x9c\x01\x80\x8aT\x17\xb3\x80\x93\x01\xf3\xa8,\x87\xec \xe4\n\x84\x90\x9b!\xfbp\xf8l.\xe4\xcf\x90G\xe7\xe4L\x87\xacj\x05\xd9*\xed\xbb<\x19\x7f\xcb\x996\x92\x93\xcd\xce\x18ay-2S\n\x12\xe4\x89\xb2\xd9\xb3\xfe\xcf\xe9\xf8\xdf\x96\x93-\x19\x1e\xc3\x146*_\x1c\x16+\xadY:oY\xd3#\xa4L\x85|^\x98\x16\x15\rY\x03\xf2u has type bytes, but isn't valid UTF-8 encoding. Non-UTF-8 strings must be converted to unicode objects before being added. EDIT: I have also tried: from PIL import Image i = Image.open(theimage) b = i.tobytes() msg2.imagebinary = b msg2b = msg2.SerializeToString() -- You received this message because you are subscribed to the Google Groups "Protocol Buffers" group. To unsubscribe from this group and stop receiving emails from it, send an email to protobuf+unsubscr...@googlegroups.com. To post to this group, send email to protobuf@googlegroups.com. Visit this group at https://groups.google.com/group/protobuf. For more options, visit https://groups.google.com/d/optout.
