Fix After Effects MOV Import Error MEDIA_ENCORDER_FILE_UNSUPPORTED

Quick answer: Reinstall QuickTime 7.7.9 or convert the MOV to MP4 using Media Encoder—either fixes the error instantly.

That error—MEDIA_ENCORDER_FILE_UNSUPPORTED—shows up when After Effects tries to read a MOV file that uses a codec your system can’t decode. On Windows, MOV files rely on QuickTime for playback, and if QuickTime is missing, outdated, or broken, After Effects hands the file to Media Encoder, which then gives up. The real trigger? You probably upgraded from an older Windows machine, or you’re importing a MOV shot on an iPhone or a Canon camera with H.265 or ProRes codec. Windows doesn’t ship with QuickTime, so unless you’ve installed it manually, this error will keep appearing.

Fix 1: Install QuickTime 7.7.9 (the last Windows version)

1. Close After Effects and Media Encoder completely. Save your work first.
2. Download QuickTime 7.7.9 from Apple’s official support site (search “QuickTime 7.7.9 for Windows”). Apple stopped updating it but it’s still safe for this purpose.
3. Run the installer. You’ll see a standard setup wizard—accept the license, keep the default install location.
4. After the install finishes, restart your computer. This step matters—QuickTime won’t register its components until a reboot.
5. Open After Effects and try importing the MOV again. Go to File > Import > File, select the MOV, and click Import. If it works, you’ll see the footage appear in the Project panel.

What to expect: If QuickTime was the missing piece, the import succeeds without any error. If you still see the same warning, move to Fix 2.

Fix 2: Convert the MOV to MP4 with Media Encoder

Sometimes the codec inside the MOV is H.265 (HEVC), which QuickTime on Windows handles poorly. Converting to MP4 with H.264 is the safest bet—After Effects reads that natively.

1. Open Adobe Media Encoder (it comes with After Effects).
2. Drag your MOV file into the queue panel. You’ll see it listed with a default format—usually H.264.
3. If it’s not set to H.264, click the blue text next to “Format” and choose H.264.
4. Click the output file name to pick a destination. Save it as something like footage_converted.mp4.
5. Click the green Play button in the top right to start encoding. You’ll see a progress bar—wait until it says “Done”.
6. Now import the MP4 into After Effects. It won’t throw the error because H.264 is built into the program.

What to expect: The conversion might take a few minutes if the file is long. If Media Encoder itself refuses to read the MOV (you see a red X), you’ll need Fix 3.

Fix 3: Use VLC or HandBrake to convert (when Media Encoder fails)

If Media Encoder can’t even open the file, your codec is too exotic. Grab HandBrake (free, open-source) and convert it there.

1. Download HandBrake from handbrake.fr and install it.
2. Open HandBrake, click Open Source, and select your MOV.
3. Under the “Presets” sidebar, choose Fast 1080p30—that’s H.264 with standard audio.
4. Click Start Encode. Wait for the progress bar to finish.
5. Import the resulting MP4 into After Effects.

This method works even with codecs like ProRes or DNxHD that Windows doesn’t support natively. The trade-off: you lose a bit of quality, but for editing you won’t notice.

Alternative fix: Use Shutter Encoder for codec preservation

If you need to keep the original quality (say, for VFX work), use Shutter Encoder instead of HandBrake. It can remux (not re-encode) the MOV to a format After Effects likes, like MP4 with the same codec. That preserves every pixel.

1. Download Shutter Encoder from shutterencoder.com.
2. Drag the MOV file into the app.
3. Choose MP4 from the “Output” dropdown.
4. Under “Advanced features”, select “Copy” instead of “Convert”—this just changes the container without touching the video data.
5. Click Start function. You’ll get an MP4 that looks identical to the original.

This is my go-to when dealing with ProRes files on Windows. It’s faster than re-encoding and keeps the color data intact.

Prevention tip: Set up a consistent import pipeline

You won’t fix this permanently by avoiding MOV files—plenty of clients send them. Instead, make a habit of converting any MOV to MP4 before you start a project. Keep HandBrake or Shutter Encoder installed, and run every incoming video through it once. That way you never hit the error mid-project, and you stop wasting time on troubleshooting when you should be animating.

One more thing: if you’re on a Mac, you never see this error because QuickTime is built in. But on Windows, QuickTime is the weak link. Install it, keep it updated (even though it’s old), and you’ll dodge most codec issues.