ffmpeg

Presents

• For applying in Batch: for %f in (*.ext) do ffmpeg -i "%f" [command] "e-%~nf.ext"

• trim: ffmpeg -i file.ext -ss 00:00 -to 00:00 -c copy file.ext

• reduce video size: for %f in (*.mp4) do ffmpeg -i "%f" -crf 28 "e-%~nf.mp4"

• audiobook: for %f in (*.mp3) do ffmpeg -i "%f" -c:a libopus -b:a 48k "e-%~nf.opus"

• reduce images size: for %f in (*.jpg) do ffmpeg -i "%f" -q:v 3 "e-%~nf.jpg"

• Watermark: ffmpeg -i input.mkv -i watermark.png -filter_complex "overlay=50:50" output.mkv

• Chroma Key: ffmpeg -i input.mkv -c:v vp9 -filter:v "chromakey=0x00ff00:0.1:0.2" output.webm

• Overlay Videos: ffmpeg -i input.mkv -i input2.mkv -filter_complex "[0:v][1:v] overlay=25:25" output.webm

Commands

• base command: ffmpeg -i input.ext output.ext
• copy metadata: -map_metadata 0
• VF:
  • resizing: -vf scale=[scale] W:H or -1 to auto calculate
  • Cropping: -vf crop=[W:H:x:y]
  • brightness and contrast: -vf eq=brightness=0.06
  • Rotating: -vf "transpose=1"
  • Grayscale: -vf format=gray
  • combine: -vf "scale=1280:-1,crop=1280:720"
• image quality: -q:v [1-31]
• video quality: -crf [18-51]
• Trim Video:
  • start time: -ss
  • duration relative to start: -t
  • end time: -to
  • copy codec: -c copy
• video codec: -c:v [video.codec] "libx265" "copy"
• audio codec: -c:a [audio.codec] "libopus"
• video bitrate: -b:v [video bitrate]
• audio bitrate: -b:a [audio bitrate]
• FPS: -r [fps]
• resolution: -s [resolution]
• no video: -vn