Fixing Common Movavi Video Converter Errors

Fixing Common Movavi Video Converter errors often requires a systematic approach to identify whether the issue stems from software settings, system drivers, or file compatibility. In 2026, most conversion failures and playback glitches on Windows 10 and 11 are linked to hardware acceleration conflicts or missing runtime libraries. This guide provides actionable solutions to get your media files converted and playing correctly.

Common Errors

• Unknown Error / Export Failed: The conversion process stops unexpectedly or crashes the program.
• Audio Out of Sync: The sound does not match the video movement in the output file.
• OpenGL / Black Screen Error: The preview window is black, white, or green due to graphics driver issues.
• Runtime Error (Visual C++): The application fails to launch with a Microsoft Visual C++ error message.
• No Audio (Codec Missing): Video converts but plays without sound, often due to missing AC3 or HEVC support.

Fix 1: Export Failed / Unknown Error

This generic error often occurs when the software cannot access the necessary hardware resources for faster rendering. Disabling hardware acceleration usually resolves this by forcing the software to use the CPU instead.

1. Open Movavi Video Converter and click Settings > Preferences in the top menu.
2. Navigate to the Acceleration tab.
3. Uncheck the boxes for Intel HD Graphics, NVIDIA, and AMD acceleration.
4. Click OK to save changes and restart the application.
5. Attempt the conversion again; if successful, your graphics driver likely needs an update.

Fix 2: Audio Out of Sync

Desynchronization typically happens when the frame rate of the input video varies or when the processing load is too high for the current settings.

1. Go to Settings > Preferences.
2. Disable SuperSpeed conversion if it is enabled.
3. Check the Video tab in preferences and ensure the output frame rate matches the source (e.g., 30 FPS or 60 FPS).
4. If the issue persists, select a different output format (e.g., convert AVI to MP4) to force a full re-encoding of the stream.

Fix 3: OpenGL / Black Screen Error

A black or green screen in the preview window indicates that the program cannot communicate effectively with your graphics card's OpenGL interface.

1. Right-click the Start button and select Device Manager.
2. Expand Display adapters, right-click your graphics card, and select Update driver.
3. If updating doesn't work, open Movavi, go to Settings > Preferences > General.
4. Check the box for Use OpenGL implementation (if available) or Use software OpenGL.
5. Restart the program to apply the new rendering mode.

Fix 4: Runtime Error (Visual C++)

This error prevents the application from launching and signals that the Microsoft Visual C++ Redistributable packages are corrupted or missing.

1. Press Win + R, type appwiz.cpl, and press Enter.
2. Scroll down to find entries labeled Microsoft Visual C++ Redistributable (years 2015-2022 are most critical).
3. Right-click the most recent version and select Change.
4. Click Repair in the setup window that appears.
5. Repeat this for both x86 and x64 versions if listed, then reboot your PC.

Fix 5: No Audio (Codec Missing)

If your converted file has no sound, especially on Windows 11, it is often because the system lacks the specific audio codec (like AC3) required to decode the stream.

1. Download and install a reputable codec pack like the K-Lite Codec Pack (Standard).
2. Alternatively, use a player like VLC Media Player to verify if the audio track exists but is just silent in the default player.
3. In Movavi, click the Cogwheel icon next to your output format.
4. Under the Audio tab, change the audio codec from "Smart" or "Copy" to AAC or MP3.
5. Re-convert the file with these new audio settings.

Prevention Tips

• Keep Drivers Updated: regularly check for GPU driver updates via NVIDIA GeForce Experience or AMD Adrenalin to prevent rendering crashes.
• Avoid System Overload: Close browser tabs and heavy applications while converting 4K or high-bitrate video files.
• Clean Install Regularly: If you upgrade Movavi versions, uninstall the old version completely to prevent library conflicts.

When to Contact Support

If the above solutions fail, you may need technical assistance. Contact Movavi support if the software crashes immediately upon opening despite a clean reinstall, or if you receive a "License Validation Failed" error that persists after checking your internet connection. Before contacting them, prepare your log files (found in the Help menu) and a screenshot of the specific error code to speed up the resolution process.