avidemux

avidemux [options] [input-files]

--load
    Load input video file(s)

--save
    Save output to specified file

--output-format
    Set output format (e.g., AVI, MP4, MKV, PS)

--begin
    Start processing at time (HH:MM:SS.mmm)

--end
    End processing at time (HH:MM:SS.mmm)

--video-stream
    Select video stream index (0-based)

--audio-streams
    Select audio streams (comma-separated)

--first-frame
    Start at frame number

--last-frame
    End at frame number

--info
    Display file information only

--nogui
    Run in CLI mode (no GUI)

--quiet
    Suppress console output

--rebuild-index
    Rebuild video index

--auto-script