Re: [Openexr-devel] Re: [Openexr] KeyKode

[Ken McGaugh]

Thanks Thomas for that link.  It does make sense to
move the perfOffset to the end of the data structure.

But I didn't see anything in that pdf about a suggested
order for the data, or are you referring to the order
the data is printed in the barcode on the film?

--Ken

Thomas Kumlehn wrote:
> Hi Ken,
>
> The Kodak KeyKode (the 'K' is trademarked) spec uses another hierachy than
> the one you suggested.
> see
> http://www.kodak.com/US/plugins/acrobat/en/motion/postProduction/keykode/35mm.pdf
> (similar document are available for 16/65mm)
>
> This reordering is just to make others aware that perfOffset is the least
> significant counter.
>
>      struct keyCode
>      {
>          char filmMfgCode[2];
>          char filmType[2];
>          char prefix[6];       // 6-digit roll number
>          char count[4];        // foot counter
> /*!*/    char perfOffset[2];   // this is counting and interpolated 
>                                // between barcodes
>     };
>
> The barcode uses USS-128 encoding but AFAIK only digits are used/allowed.