Formerly working embedded .mov-files in PDF won´t play anymore

There was a security patch what was not long released and that could have caused the problem, it turned on the advanced security options in 9 as default and was some extras for version 8 too but am not really sure what they were.

Have you tried looking in your preferences under Multimedia Trust? What do those options say?

Thank you! Actually I just went into the "Trust" section and even cleared the list of trusted documents to see what would happen. But it still doesn´t play nor acknowledge the .mov parts of the pdf. Which format do you normally embed as a movie clip?

Unfortunately the problems playing legacy media (audio and video that relies on loading an external player such as Quicktime or Windows Media Player) aren't going to go away, as by allowing them we can't help but open security loopholes; because we're relying on someone else's code that often has exploitable bugs in it. The 9.3 and 8.2 patches turn off legacy by default, and restrict it even when it's manually re-enabled. As with all security patches, precisely what's changed and why is not made public, but the outcome is self-evident: Adobe strongly steers people to use the internal Flash media abilities in Reader and Acrobat 9, as by running all rich media content through the specially-sandboxed Flash Player compiled into version 9, it can be kept from accessing things it shouldn't. Although Acrobat 8 can embed a Flash video, it does it as a legacy asset (opening an *external* copy of Flash Player to run it) so it's affected by the patch restrictions just the same.


If you really open up the MM Trust settings (setting them to allow everything) you can get most legacy content to play eventually, but you have to remember that by doing so for every PDF, you're also re-opening the vulnerabilities that the patch was trying to close, so *only* do it for files you absolutely know are safe, and make absolutely sure that you're not allowing the trust to apply to all files you open through the Web or emails. There are still PDFs in the wild trying to exploit the pre-Feb holes, as they know there's a huge rollout tail for Acrobat and Reader, especially in the corporate sector.

Yes, I know if you've got Acrobat 8 and don't want to pay to upgrade to 9, you're stuck - but the code for 9 is so completely different it's just not viable to add those features into 8 through a dot release.

Thank you for very insightful info! Now I at least know what the problem is! I might try the Demo version of Acrobat 9 first though.