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Title: cpp passing ImageInfo arguments
Post by: PaulWilliams on February 08, 2021, 06:49:32 PM

I am a newcomer to ExifTool and very impressed by its capabilities, but I am having a problem with the C++ interface.

I am trying (and failing) to pass the "-c %d %d %.4f" to ImageInfo in C++.

I am clearly getting something wrong. I have tried quoting just the GPS format, quoting the whole command with and without escaped quotes on the format.

What am I missing or misunderstanding?

Thanks and Regards

Title: Re: cpp passing ImageInfo arguments
Post by: Phil Harvey on February 08, 2021, 09:16:30 PM

From the documentation (https://exiftool.org/cpp_exiftool/index.html#ImageInfo) (underline added):

   const char *opts
   Additional exiftool options, separated by newlines. See notes 2, 3 and 5.
   Only the following exiftool options are allowed: -TAG -x -b -c -charset -d -L
   -lang -listItem -n -sep -sort --a -e -ee -ext -F -fast -fileOrder -i -if -m -password
   -r -scanForXMP -u -U -z -globalTimeShift -use -@ -api

So you should use "-c\n%d %d %.4f".

- Phil

Title: Re: cpp passing ImageInfo arguments
Post by: PaulWilliams on February 08, 2021, 09:30:30 PM

Phil,

Thanks for the very prompt response.

I had read the line "Additional exiftool options" the documentation a number of times. It had not once struck me to put a newline between
the flag and its associated values. As soon as I read the same text in your reply (before seeing your example) I wondered if it could mean a
newline between the two.

Thanks again for the response and a tool that has transformed my knowledge of image metadata.

Paul

ExifTool Forum

ExifTool => Developers => Topic started by: PaulWilliams on February 08, 2021, 06:49:32 PM