I have recently upgraded to Photoshop CS6 on MacBook Pro running OS X 10.8 and need to open a JP2 file that is 2.11 GB. Photoshop throws out an error message "...the file format module cannot parse the file". Can anyone help? I would like to convert this file to a PSD file ideally.
JPEG 2000 is not widely suported. Not sure how tightly the standard is enforced, so maybe you have a file that is a little odd. Irfanview is a little looser in what it will open than PS so you might try it.
Here is quote from Irranview FAQ
Q: Can I use IrfanView on Mac?
A: Yes, probably. There is no native-Mac version of IrfanView. However, you can use IrfanView in conjunction with Mac program like WineBottler/DARWINE. Take the ZIP version of IrfanView and unzip it or copy your existing Windows IrfanView folder to Mac. This is easier because the installer may need additional Windows DLLs to run.
Have you tried opening file in other Mac programs? If you can open then use "save as" and convert or make new copy as JP2.
See if Preview will open it then save to a new file which Photoshop will open. You'll want to use a lossless format to avoid degrading the image. A resaved JPEG-2000 may do the trick, but three you could try are:
JPEG-2000, quality: lossless
TIFF, compression: LZW
I don't know the image dimension and file size limits of these formats.
Not sure how to go about it. Do a web search for irhanview for mac. There are several hits.
I see in one that many users like Preview. If that says it is damaged then Irranview may give you the same results.
Do you have another computer that is not running Mt. Lion to try it on?
Yes, I have tried on another Mac running on OS X 10.7 and Preview has the same error when trying to open the file. I will as you suggest try and download a new JP2 file and see if I have better luck with that. I can only do that on Tuesday though, so thanks you for your help and speak again later.
If you have multiple applications telling you the file is damaged/unreadable, then the file is probably damaged... This is not really surprising if you've downloaded a 2 GB image file from the internet. Redownload is the best option, especially if you can get something to help with the download, something that will verify the download once complete.
I have just opened the file successfully on my work PC and I can see and load the file in our mapping software called ArcMap. I can even preview the file in ArcCatalog? The native file format for these programs is SID which Photoshop does not open!
I did not download the file from the internet, I transfered the file from my PC (windows) onto an external hard drive and then copied it onto my Mac to edit in Photoshop, but alas no luck!
Export a TIFF from ArcMap and open that with Photoshop.
I don't know how big your image is but I've opened a 70,000 by 70,000 pixel LZW-compressed TIFF with Photoshop CS6 on my Mac.
Your TIFF will save and open more quickly if it is uncompressed. However, substantial (and sometimes enormous) storage space reduction can be made by compression.
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