Local copy and slightly fixed script of this discussion: https://github.com/Breakthrough/PySceneDetect/discussions/475

scenedetect-mute.sh

__input="$1" # Required
__phase="$2" # Aka controller
__video_file=$(basename -- "$__input")
__video_name="${__video_file%.*}"
__video_ext="${__video_file##*.}"
__csv_name="${__video_name}-Scenes.csv"

# TODO: file checks

# Detect content and write it to be revised later.
# Saving into a file is important for consistency!
if [ ! -f "$__csv_name" ]; then
  echo "$__csv_name doesn't exist."
  scenedetect -i "$__input" \
  detect-adaptive \
  list-scenes -f "$__csv_name" --skip-cuts
fi

# Split everything as it is for human revision.
# Do it manually: remove lines to be merged, eg it was too short.
# To speed up, eg it will be split again later, you can lower the quality.
#  split-video -crf 32 -p ultrafast
#  split-video -a "-map 0:v:0 -map 0:a? -map 0:s? -c:v libx264 -preset slow -crf 17 -an"
if [ -f "$__csv_name" ]; then
  echo "$__csv_name exist, process video spliting."
  scenedetect -i "$__input" \
  load-scenes -i "$__csv_name" -c "Start Timecode" \
  split-video -a "-map 0:v:0 -map 0:a? -map 0:s? -c:v libx264 -preset slow -crf 17 -an" # equal to -hq, but no audio
fi

scenedetect.sh

__input="$1" # Required
__phase="$2" # Aka controller
__video_file=$(basename -- "$__input")
__video_name="${__video_file%.*}"
__video_ext="${__video_file##*.}"
__csv_name="${__video_name}-Scenes.csv"

# TODO: file checks

# Detect content and write it to be revised later.
# Saving into a file is important for consistency!
if [ ! -f "$__csv_name" ]; then
  echo "$__csv_name doesn't exist."
  scenedetect -i "$__input" \
  detect-content \
  list-scenes -f "$__csv_name" --skip-cuts
fi

# Split everything as it is for human revision.
# Do it manually: remove lines to be merged, eg it was too short.
# To speed up, eg it will be split again later, you can lower the quality.
#  split-video -crf 32 -p ultrafast
if [ -f "$__csv_name" ]; then
  echo "$__csv_name exist, process video spliting."
  scenedetect -i "$__input" \
  load-scenes -i "$__csv_name" -c "Start Timecode" \
  split-video -hq
fi

Maybe I should learn Python.