Php photo gallery TWG | JFUploader | TWG Flash upload | WFU | Forum

Hi Michael

I have a gallery where several people are uploading files for use by a group. I am having trouble downloading files from one camera in particular. It's a Canon EOS Digital Rebel.

Horizontal images download fine. Vertical images get a very small file that contains:



Both vertical and horizontal files are about 3-4 MB with an image size of 3888x2592 pixels. Previews for all images are OK in TWG

Funny thing is if I try downloading with the Flash uploader, the vertical pictures download fine. Previews are also OK in Flash.

I don't recall having this issue last year.

Any guesses? I can send you a login and path if you need to look around.

Thanks!

T.

Do you add a watermark when downloading originals? Because then it is loaded into memory to add it.

I don't know why vertical and horizontal images should use different php memory but it seems that is does.

- Michael

Nope, no watermark.

Would increasing the memory even help? It looks like it is trying to allocate a lot less than the "allowed memory size" . . . or is 10368 the additional amount it's trying to add?

Can you think of anything in the EXIF that could cause this? The only difference that I can think of in the images is the EXIF rotation or orientation flag (don't remember what it's called exactly).

T.

Hi Michael,

I'm trying to figure out what happens when these images are downloaded. The line referenced in the error has to do with rotation. I'm concerned that vertical images are being re-saved or re-compressed or something when they are downloaded.

I am experimenting with a pair of images taken last year from the same camera but with a slightly smaller file size. Both the horizontal and vertical images download fine in this case.

Looking at the info in the gallery, the horizontal image is 2081KB and the vertical image is 2037KB. When I download the images the horizontal image is 2036KB, but the vertical image is only 372KB. When I open the vertical image in Photoshop, the full resolution is still there. It seems that the rotated images are being re-compressed at a higher compression level which is not a good thing for our use.

Any way around this, or am I missing something?

Thanks,

T.

Have you maybe enabled auto rotate in TWG? Not sure that then even the Originals are rotated.
Or have you rotated the image manually in TWG? Then the original is rotated too.
Watermarks?
Please check if you have any of this settings. Then I check how to disable this...

- Michael

Hi,

As I mentioned before, no watermark. I am using auto rotate, they have not been manually rotated in TWG.

It also seems that the EXIF data is stripped out of the vertical images.

Again, the originals seem to be fine. If I download a vertical image by FTP they appear to be unchanged.

Thanks!

T.

This is the autorotate. I do rotate the vertical images then for the Originals too.

You can enable direct download. Then I deliver the images without any modification.

- Michael

Setting direct download resolved the issue, but now the image opens in a browser window rather than simply downloading which adds one more step to the download process. Is there any way to avoid this?

As for the auto rotate: I am using this to show the preview images correctly. Is there any way to make it work for the previews but not when files are downloaded?

Thanks,

T.

with direct download the broser behaviour is used.

If you don't like the rotation you would only have to change one line in the code when the image is returned. If no rotation is passed to output function the original is passed like the vertical image.

in imagecreate.inc.php you have to change quite at the bottom
putimage($image_full, $twg_rot);
to
putimage($image_full);

- Michael

Thanks Michael, that worked.

Any chance of adding that as an option in the config so I don't have to worry about it with software updates?

Would I want to make the same change to "putwatermarkimage" as well . . . just in case I end up using watermarks someday?

Thanks!

T.

when you use watermarks the image has to be processed - therefore there this is not possible.

- Michael

Thanks for your help Michael.

T.