user5883: I've tried to import .eps and .ai files unsuccessfully. Are there any vector formats supported by FCPX?

user5883: No.
Or at least not yet. According to this post:
https://discussions.apple.com/thread/2323932
EDIT:
Here's the offical supported media formats for FCPX from the Apple support site. It shows that those formats are not supported.

user14541: Here is a workaround I've discovered that seems to work ok. It's not elegant, but it gives you vector support within FCPX, which can be handy in a number of situations. It does require Apple Motion, however.

Convert your vector file into a PDF using Preview.
Create a Final Cut Generator in Apple Motion
Import PDF
Click the PDF in the "Media" pane (next to the Viewer), then in the inspector, un-click "Fixed Resolution" in the "Media" tab.
Drag the file into your composition.
Save As...

This will create a generator in FCPX, which is a little more permanent than making a simple file. But if you're doing work for a client and want a persistent vector version of their logo or something, this can be very helpful.

5883: <p>I've tried to import <strong>.eps</strong> and <strong>.ai</strong> files unsuccessfully. Are there any vector formats supported by FCPX?</p>
 5883: <p>No.</p>

<p>Or at least not yet. According to this post:
<a href="https://discussions.apple.com/thread/2323932" rel="nofollow noreferrer">https://discussions.apple.com/thread/2323932</a></p>

<p><strong>EDIT:</strong>
Here's the <a href="https://support.apple.com/kb/PH12754?locale=en_ZA" rel="nofollow noreferrer">offical supported media formats for FCPX</a> from the Apple support site. It shows that those formats are not supported.</p>
 14541: <p>Here is a workaround I've discovered that seems to work ok. It's not elegant, but it gives you vector support within FCPX, which can be handy in a number of situations. It does require Apple Motion, however.</p>

<ol>
<li>Convert your vector file into a PDF using Preview.</li>
<li>Create a Final Cut Generator in Apple Motion</li>
<li>Import PDF</li>
<li>Click the PDF in the "Media" pane (next to the Viewer), then in the inspector, un-click "Fixed Resolution" in the "Media" tab.</li>
<li>Drag the file into your composition.</li>
<li>Save As...</li>
</ol>

<p>This will create a generator in FCPX, which is a little more permanent than making a simple file. But if you're doing work for a client and want a persistent vector version of their logo or something, this can be very helpful.</p>
