commands

Commands

Commands are parser helpers that says what options, flags and values are required to do something. For example, the trim command requires at least two flags, from and to. Commands have one-word aliases (e.g. o for optimize)

List

optimize (o)

• Requires value

Reduces TBN, making a light output file without not much loss of quality. The value should be between 1k and 10k for efficient optimization.

Example

fftools optimize -i video.mp4 output.mp4 4k

trim (t)

• Requires at least from or to options

Trim input between timestamps. If only from is provided, media will start at that timestamp. If only to is provided, media will end at that timestamp. Timestamp syntax is the FFmpeg time duration.

Examples

# Trimming between a range
fftools trim -i video.mp4 --from 00:03:40 --to 00:32:00 output.mp4

# Set start
fftools t -i video.mp4 --from 00:05:00 output.mp4

# set end
fftools t -i video.mp4 --to 00:24:30 output.mp4

gif (g)

Transform a video into a lossless gif. If output is really big, use scale option for reduce resolution.

Examples

# Lossless gif
fftools gif -i video.mp4 output.gif

# With scale (-50%)
fftools gif -i video.mp4 --scale 50 output.gif

scale (s)

• Requires value Scales video resolution by percentage.

Examples

# Reduce size (-50%)
fftools scale -i video.mp4 output.mp4 50

# Enlarge size (+50%)
fftools scale -i video.mp4 output.mp4 150

volume (v)

• Requires value Set audio volume level. Value syntax is decibels or percentage.

Examples

# With percentage (-50%)
fftools volume -i audio.mp3 output.mp3 50

# With decibels (+10dB)
fftools volume -i audio.mp3 output.mp3 10dB

merge (m)

• Requires two inputs Merge two input files. Useful for merge video and audio. By default, the two inputs are trimmed to the shortest one. You can override it with notrim flag. The first input must be the audio and the second the video.

Examples

# Merging video and audio
fftools merge -i audio.mp3 -i video.mp4 output.mp4

# Avoid trim
fftools merge -i audio.mp3 -i video.mp4 output.mp4 --notrim

fps

• Requires value Set framerate.

Example

fftools fps -i video.mp4 output.mp4 20

free (f)

Free command that doesn't require any flag or value. Useful for use options and flags as you like.