This guide can help you convert M4V video files to Final Cut Pro X, 7, 6.

1. Convert M4V Files into Final Cut Pro
“I've been doing a lot of actor's reels for local actors. they come
to me with a DVD of their work and I've been using HandBrake
to pull the files off the disc, which results in an m4v file. I've had
some success converting this to ProRes in QuickTime and
editing this in FCP. Does anyone have a better workflow?”
M4V to FCP Converter can help you to convert M4V files into
FCP supported video file DV so that you can easily import M4V
clip into FCP and edit M4V files with FCP free.
Easy operation to finish M4V to FCP conversion for editing
M4V files with FCP as the following
Step 1: Add M4V videos
Click the “Add File” button to select the M4V videos from your
hard drive to FCP Converter.
Step 2: Select DV as the output format
Move your mouse cursor to Common Video and select an DV
video format as the target formats.

2. Step 3: Convert M4V to FCP
Click on the Start button to start converting M4V to FCP.