How to Fix: x264 on my Mac keeps giving me "command not found" error

The 'command not found' error when trying to run x264 on a Mac running MacOS 11.4 Big Sur can be frustrating for users who are new to encoding videos. This issue affects individuals who have installed x264 via Homebrew and are attempting to encode a video but are unable to get the command to work properly.

This problem is particularly vexing because it seems like x264 should be working, given that it has been installed via Homebrew and the 'No input file' error message suggests that it can find the input file when run with the '-h' option.

🛑 Root Causes of the Error

• The primary cause of this issue is likely due to the fact that x264 requires additional dependencies to be installed in order to function correctly. The most common dependency required for x264 is libx264, which can be installed via Homebrew using the following command: brew install --cask libx264. However, even after installing libx264, some users have reported issues with the 'command not found' error.
• Another possible cause of this issue could be related to the version of x264 being used. It is possible that an older version of x264 was installed via Homebrew and does not include all of the necessary dependencies required for certain encoding options.

✅ Best Solutions to Fix It

🎯 Final Words

To resolve the 'command not found' error when trying to run x264 on a Mac running MacOS 11.4 Big Sur, users can try installing libx264 via Homebrew using the following command: brew install --cask libx264. If this method does not work, then updating x264 via Homebrew may be necessary. By following these steps, users should be able to resolve the issue and successfully encode videos using x264.