Manipulating Videos Using `ffmpeg`

Extract a Portion of the Video

ffmpeg -ss "$start_time_in_seconds" -i "$input" -to "$end_time_in_seconds" -c copy "$output"

Reduce a Video's Resolution by Half

ffmpeg -i "$input" -vf "scale=iw/2:ih/2" -c:a copy "$output"

• Use the scale filter with expressions to halve the width and height:
  • iw = input width, ih = input height.
• -c:a copy copies the audio stream without re-encoding.