[rfg@rfg-pc librito]$ pdftocairo -pdf -f 1 -l 13 libro.pdf -extract.pdf
Syntax Error: Failed to decode jp2 structure<0a>
Syntax Warning: Did no succeed opening JPX Stream as JP2, trying as J2K.
Syntax Error: 00000000: expected a marker instead of 0<0a>
Syntax Warning: Did no succeed opening JPX Stream as J2K, trying as JPT.
Syntax Error: Forbidden value encounter in message header !!<0a>
Syntax Error: [JPT-stream] : Expecting Main header first [class_Id 0] !<0a>
Syntax Error: Did no succeed opening JPX Stream.
Syntax Error: Failed to decode jp2 structure<0a>
Syntax Warning: Did no succeed opening JPX Stream as JP2, trying as J2K.
Syntax Error: 00000000: expected a marker instead of 0<0a>
Syntax Warning: Did no succeed opening JPX Stream as J2K, trying as JPT.
Syntax Error: Forbidden value encounter in message header !!<0a>
Syntax Error: [JPT-stream] : Expecting Main header first [class_Id 0] !<0a>
Syntax Error: Did no succeed opening JPX Stream.
Syntax Error: Failed to decode jp2 structure<0a>
Syntax Warning: Did no succeed opening JPX Stream as JP2, trying as J2K.
Syntax Error: 00000000: expected a marker instead of 0<0a>
Syntax Warning: Did no succeed opening JPX Stream as J2K, trying as JPT.
Syntax Error: Forbidden value encounter in message header !!<0a>
Syntax Error: [JPT-stream] : Expecting Main header first [class_Id 0] !<0a>
Syntax Error: Did no succeed opening JPX Stream.
Syntax Error: Failed to decode jp2 structure<0a>
Syntax Warning: Did no succeed opening JPX Stream as JP2, trying as J2K.
Syntax Error: 00000000: expected a marker instead of 0<0a>
Syntax Warning: Did no succeed opening JPX Stream as J2K, trying as JPT.
Syntax Error: Forbidden value encounter in message header !!<0a>
Syntax Error: [JPT-stream] : Expecting Main header first [class_Id 0] !<0a>
Syntax Error: Did no succeed opening JPX Stream.
Syntax Error: Failed to decode jp2 structure<0a>
Syntax Warning: Did no succeed opening JPX Stream as JP2, trying as J2K.
Syntax Error: 00000000: expected a marker instead of 0<0a>
Syntax Warning: Did no succeed opening JPX Stream as J2K, trying as JPT.
Syntax Error: Forbidden value encounter in message header !!<0a>
Syntax Error: [JPT-stream] : Expecting Main header first [class_Id 0] !<0a>
Syntax Error: Did no succeed opening JPX Stream.
Syntax Error: Failed to decode jp2 structure<0a>
Syntax Warning: Did no succeed opening JPX Stream as JP2, trying as J2K.
Syntax Error: 00000000: expected a marker instead of 0<0a>
Syntax Warning: Did no succeed opening JPX Stream as J2K, trying as JPT.
Syntax Error: Forbidden value encounter in message header !!<0a>
Syntax Error: [JPT-stream] : Expecting Main header first [class_Id 0] !<0a>
Syntax Error: Did no succeed opening JPX Stream.