I can't save mp4 result

[1057520143]

After configuring the environment according to the steps, you can get the image results in the / results / data directory, but when saving as an MP4 file, the code error is as follows:

According to the inspection of the operating environment, the ffmpeg package already exists in the environment. I want to ask how to solve this problem?

[ppsha3]

Make sure the ffmpeg is added in your global env path...

1. Open terminal and type : echo $PATH
2. If ffmepg is not there, add it by - PATH=$PATH: