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Comment by GOATS- | Hacker News Reader

I used to clip tons of videos for highlight reels, which was made a lot quicker with this snippet.

  clip_video () {
          ffmpeg -ss "$2" -i "$1" -t "$3" -c copy "$4"
  }

Used like so:

  clip_video filename.mp4 start_point duration output.mp4

View on HN

I do a similar thing, except for making gifs:

    if [ -z $3 ] 
    then
        echo "usage: $0 file start_seconds duration [scale=600] [fps=15] [crop]"
        exit 1
    fi

    if [ -z $4 ]
    then
        SCALE=600
    else
        # w=iw/2:h=ih/2 half size
        SCALE="$4"
    fi

    if [ -z $5 ]
    then
        FPS=15
    else
        FPS=$5
    fi

    if [ -z $6 ]
    then 
        CROP="crop=iw:ih:0:0,"
    else
        # CROP="600:ih:250:0" full height
        CROP="setsar=1,crop=${6},"
    fi

    rm "${1}.gif" &> /dev/null

    ffmpeg -ss $2 -t $3 -i "$1" -vf  ${CROP}fps=${FPS},scale=${SCALE}:-1:flags=lanczos,palettegen palette.png -loglevel error
    ffmpeg -ss $2 -t $3 -i "$1" -i palette.png -filter_complex "${CROP}fps=${FPS},scale=${SCALE}:-1:flags=lanczos[x];[x][1:v]paletteuse" "${1}.gif" -loglevel error

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