Delete all meta except jfif

Started by ranger, May 08, 2020, 10:47:56 AM

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ranger

Thanks, now it works. That is what I was looking for!

Just one more thing I want to check if you can help - when you use argument  -jfif:xresolution=72  it forces this resolution even though the real one may be different.
After all the processing, with  --list  I can see the "Image Width: 1132" and "Image Height: 726"  information, which is the real one.
Still, wouldn't it be better not to force resolution in APP0 to avoid possible conflicts or confusions?

Is there a way to create the -jfif without specifying the resolution?
Or, is it that it doesn't actually matter what value the resolution is set to...?

StarGeek

Resolution is not the image width/height.  It's the DPI to be initially used.  For example, adding it to a Doc file, it will be used to determine the starting size of the image on the page.
* Did you read FAQ #3 and use the command listed there?
* Please use the Code button for exiftool code/output.
 
* Please include your OS, Exiftool version, and type of file you're processing (MP4, JPG, etc).

Phil Harvey

As StarGeek said, and as I have been trying (unsuccessfully) to explain, you should try to understand the difference between resolution (pixels/inch) and image size (number of pixels).

- Phil
...where DIR is the name of a directory/folder containing the images.  On Mac/Linux, use single quotes (') instead of double quotes (") around arguments containing a dollar sign ($).

ranger

OK, thanks, got it.
So this actually doesn't matter.  As long as number of pixels is kept unchanged, a higher resolution means a smaller size (in inches) and vice-versa, so it doesn't actually matter, right?

Thanks Phil, you did a good job explaining, thumbs up.
Same for you StarGeek!   ;)

Phil Harvey

YES!  By Jove, I think he's got it!  :)

- Phil

Edit:  Sorry, I was thinking of this thread when I wrote these last two responses.  Scriptero had a similar misunderstanding, and that was the thread in which I was trying in vain to explain the meaning of the resolution tags.  You're (thankfully!) a lot quicker than him.
...where DIR is the name of a directory/folder containing the images.  On Mac/Linux, use single quotes (') instead of double quotes (") around arguments containing a dollar sign ($).