Please excuse me if this is a dumb/obvious question. I did try searching the forums for similar problems and didn't find anything that seemed to speak to my issue.
I'm having a problem where Bridge CS4 won't read/edit xmp metadata (specifically, keywords and descriptions in the IPTC panel) that I have entered using CS6. it will read some files, not others. The files are all .mp4s. Of these files, I can read/edit IPTC panel metadata for some of them in Bridge CS4; I can add metadata for all of them in CS6. I see no particular pattern in these files to explain what is and isn't read/editable in CS4.
My question is whether this is a compatibility issue between different versions of CS (in this instance, CS4 and CS6). i know it's a tired refrain to blame software when it could easily be user error, in which case I'd be frankly delighted to know what i'm doing wrong. Please bear with me as I give a few more details.
I'm using macs. I've tried this on multiple systems - for instance, on a mac pro 3 which for some reason has both CS4 and CS6 installed, i can add and edit keywords using CS6, but not when using CS4. Again, in CS4, some .mp4 files read/edit, others do not.
Bridge CS4 blames the files and tells me that the selected file cannot store xmp metadata, and that the properties cannot be modified. To be specific, in the metadata panel it says "this property cannot be modified"; in the keyword panel, it says, "This file (zzz.mp4) cannot store xmp metadata. No changes will occur." This seems odd, because I'm able to add xmp metadata for the same files in CS6 on the same computer, and other computers. I know this problem would disappear if all our computers were using CS6 (or CC), but unfortunately that's not a possibility at the moment. Some of them only have CS4.
Computer details (not an exhaustive list, but two instances): mac pro 3.1 running snow leopard, 16GB memory; macbook pro 4.1 running snow leopard, 4GB memory; adobe bridge cs6 (5.0.0.399) and cs4 (3.0.0.464).
Things I have tried:
Permissions - the files are set to read/write for everyone. Given that I can add/edit metadata in CS6, it doesn't seem to be a permission issue.
Purging the cache - other users seem to have had problems adding metadata in Bridge CS4 where purging the cache for affected files solved the problem. Didn't work in this instance.
Upgrading all affected computers to CS6/CC is beyond my control. I need to figure out why CS4 won't let me read/add/edit xmp metadata, if only for the sake of understanding the broader implications for interoperability.
Any helpful suggestions would be much appreciated.
Thanks,
Kevin