ffmpeg

drop a video

or click anywhere to pick one

mp4, mov, mkv, webm, etc.

at0s length-

source-

trim

start (seconds)

end (seconds)

clip length

encode

preset

slower = smaller file, same quality

crf (quality)

lower = better. 18 is visually lossless

audio

aac usually reduces filesize a bit. keep is faster but only for aac/mp3

resize

disabled

height (px)

aspect ratio is locked · scaled with lanczos · width auto-computed

output

filename

,. step frame ←→ skip 1s jl skip 5s io set start / end spacek play / pause