FFmpeg 'scale' filter not present, cannot convert pixel formats.

This error message indicates that the 'scale' filter is missing in your FFmpeg installation. The 'scale' filter is responsible for resizing video frames, and it is often used in video conversion and transcoding tasks.

To fix this issue, you should check if the 'scale' filter is included in your FFmpeg installation. You can do this by running the following command in your terminal:

ffmpeg -filters | grep scale

If the 'scale' filter is not listed, you may need to recompile FFmpeg with the necessary dependencies or install a version of FFmpeg that includes the 'scale' filter. Alternatively, you can try using a different video processing library that supports frame resizing, such as OpenCV.