If you've followed the steps above and are still encountering issues, please provide more details in a comment below. Share the name of the software you are using, your operating system (and whether it's 32-bit or 64-bit), and the exact error message. This community knowledge will help us all troubleshoot more effectively.
Download the latest official version of the software from its official website and install it. 2. Install or Update FFmpeg
The most effective fix is to uninstall and then reinstall the program that is giving you the error. This ensures all necessary components, including the correct version of the DLL, are placed in the right folders.
First, it's important to know that avformat-59.dll is . It's a component of FFmpeg , a powerful, open-source multimedia framework used by many applications to handle audio and video.
In applications like Audacity, go to Preferences > Libraries and click "Locate" next to FFmpeg. Point it to the avformat-59.dll file in the folder you installed it to (e.g., C:\Program Files\FFmpeg For Audacity\avformat-59.dll ). avformat59dll free
DLL files downloaded from unverified, free third-party sources often contain viruses, malware, or ransomware.
The only safe way to obtain this file is by installing the full, legitimate FFmpeg package from an official source.
The "59" in the name refers to the specific version of the library API. If an application was built to look for version 59, it will not work with older versions (like avformat-58.dll ) or newer ones without this specific file being present in the system folders or the application directory. Common Reasons for the Error
Specifically, the "avformat" part of the name stands for . This specific library handles the multiplexing and demultiplexing (muxing and demuxing) of audio and video streams into various container formats, such as MP4, MKV, AVI, and MOV. The "59" indicates the specific major version of the library. Software That Relies on avformat-59.dll If you've followed the steps above and are
When searching for "avformat-59.dll free," your search results will be flooded with third-party DLL directory websites promising a quick, free download.
Type into your Windows search bar, right-click Command Prompt , and select Run as administrator . Type sfc /scannow and hit Enter .
Navigate to the , Quarantine , or Virus Vault section. Look for avformat-59.dll or related FFmpeg files.
If the error occurs only when launching a specific program (e.g., Audacity or OBS Studio), the easiest fix is to reinstall that program. Download the latest official version of the software
). Updating to the latest version of your media application usually resolves these versioning conflicts. Audacity Forum
| Error Message | Likely Cause | Fix | | :--- | :--- | :--- | | “The code execution cannot proceed because avformat59.dll was not found.” | File missing from app folder or system path. | Use Method 1 (copy DLL to app folder). | | “avformat59.dll is 0x00000000 (Invalid access to memory location).” | Corrupted download or version mismatch (32-bit vs 64-bit). | Delete the file, restart, and reinstall FFmpeg. | | “avformat59.dll attempted to access protected memory.” | Conflict with antivirus real-time scanning. | Add the program folder to your antivirus exclusion list. |
The error typically occurs due to one of the following reasons:
Alternatively, you can try placing it in C:\Windows\System32 (for 64-bit files) or C:\Windows\SysWOW64 (for 32-bit files). Note: Reinstalling is safer than this method. Final Checklist After replacing the file, it is recommended to: