screen-recorder: ffmpeg is not gracefully killed when running on jenkins agent through ssh

Summary

ffmpeg is not gracefully killed when running on jenkins agent

Debug Info

Please provide the following information for bug reports:

• Operating system - macOS 13.5
• Ruby version - 3.2.1
• screen-recorder version -1.6.0
• Recorder parameters - ScreenRecorder::Desktop.new(output: “#{@video_file}.mkv”)
• Recorder log (ffmpeg.log) file as a gist or on pastebin.com.
• Set ScreenRecorder.logger.level = Logger::DEBUG, run the recorder, and share the console output as a gist or on pastebin.com.

Expected Behavior

ffmpeg should be gracefully killed and a recording file is produced

Actual Behavior

ERROR - Forcefully killed ffmpeg. Recording failed!

ffmpeg.log debugLog.txt

I am suspecting the @process.io.stdin.puts 'q' line in the stop_ffmpeg cannot be run on the jenkins agent? If I run the job on the jenkins master, it works.