Re: CFD: eXIf 2017-06-09b

On Fri, Jun 9, 2017 at 10:36 AM, Phil Harvey <phil-CIeU6mJ2MbMd166Dz3SrqbDks+cytr/[email protected]> wrote:
>
>> From: Glenn Randers-Pehrson <[email protected]>
>> I removed some of the JPEG-specific details so the recommendation
>> now reads, in the 2017-06-09b version,
>>
>> While the PNG specification allows the chunk size to be as large as
>> 2^31-1 bytes, application authors should be aware that, if the Exif profile
>> is going to be written to a JPEG datastream, the total length of the eXIf
>> chunk data may need to be adjusted to not exceed 2^16-9 bytes, so it can fit
>> into a JPEG APP1 marker.
>
> Great.  I apologize for making another suggestion, but calling it a "JPEG APP1
> Exif segment" would be more accurate than a "JPEG APP1 marker" because the 6-byte
> Exif00 header is specific to the APP1 Exif segment.  Also, a "marker" is
> technically the two bytes at the start of a segment (0xff 0xe1 in this case) that
> identify the type of segment.

OK.  BTW I'm always confused about whether we should be saying
JPEG, JFIF, or JPEG/JFIF.

Glenn

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