MoviePy error ,FFMPEG error,Broken pipe

I use trainsform_video and the code shows this error: ''' OSError: [Errno 32] Broken pipe

MoviePy error: FFMPEG encountered the following error while writing file ./examples/results/foxy.mp4:

b'' ''' I search for this problem for very long time and didn't find any issue about this(most of this issue is about 'permission denied' or "Unrecognized option 'preset'.\nError splitting the argument list: Option not found\n")

I tried 'conda install -c conda-forge ffmpeg' but it still shows this error.

Did someone sucesss to fix this problem?