Rotation of images sometimes messes up bottom and top

[Pedro Côrte-Real]

Sometimes, when rotating an image with exiftran the bottom and top of the image gets mixed up.

An example image with the resulting rotation is here:

http://pedrocr.ath.cx/exiftran_examples/

The rotated.jpg image was produced from the original with:

exiftran -a -o rotated.jpg original.jpg

Sometimes, when rotating an image with exiftran the bottom and top of the image gets mixed up.

An example image with the resulting rotation is here:

http://pedrocr.ath.cx/exiftran_examples/

The rotated.jpg image was produced from the original with:

exiftran -a -o rotated.jpg original.jpg

[Pedro Côrte-Real (pedrocr)]

Here's what the developer had to say about this:

"""
Do it the other way around, first rotate then scale, that should
work. The reason most likely is that the size of the downscaled
isn't a multiple of 16. exiftran (unlike jpegtran) doesn't
handle that right now, it isn't needed for images coming
directly from the digicam.

  Gerd
"""

This workaround worked.

[Barry deFreese (bddebian)]

Pedro. Thanks for being proactive. Did the developer say if this was going to be fixed? In fact, is this bug still valid? Thank you!

[Pedro Côrte-Real (pedrocr)]

I've just checked and the bug still exists. The developer seemed to not care much about it.

[Pedro Côrte-Real (pedrocr)]

I've checked and jpegtran has the same bug so I guess the original author's explanation isn't right. Any idea what it might be instead?

[Daniel T Chen (crimsun)]

Is this symptom still reproducible in current 8.04 or 8.10 alpha?

[Javier Jardón (jjardon)]

We are closing this bug report because it lacks the information we need to investigate the problem, as described in the previous comments. Please reopen it if you can give us the missing information, and don't hesitate to submit bug reports in the future. To reopen the bug report you can click on the current status, under the Status column, and change the Status back to "New". Thanks again!