![]() This is stripped down to the bare essentials needed to resize and pad-add your other video and audio options as you see fit. Then run the command: ffmpeg -i in.mp4 -filter:v "scale=iw*min($width/iw\,$height/ih):ih*min($width/iw\,$height/ih), pad=$width:$height:($width-iw*min($width/iw\,$height/ih))/2:($height-ih*min($width/iw\,$height/ih))/2" out.mp4 It's a tad long, but you'll have to specify the padding some way.įirst, in your shell define output width and height: width=700 Here's the command that'd add pillar- or letterboxing for a fixed output width. You can provide a hex value or use a supported color name. If you are inputting a series of images, and the images vary in size, add the eval=frame option in the scale filter, such as: ffmpeg -i input -vf "scale=1280:720:force_original_aspect_ratio=decrease:eval=frame,pad=1280:720:-1:-1:color=black" output Using input images that each vary in size Using the crop filter to cut off the excess: ffmpeg -i input -vf "scale=1280:720:force_original_aspect_ratio=increase,crop=1280:720" output 4:3 input aspect ratio, 16:9 output aspect ratio. For example, an input with a 2.35:1 aspect ratio fit into a 16:9 output will result in letterboxing.Ħ40x480 (4:3) input into 1280x720 (16:9) output without upscaling. Letterboxing will occur instead of pillarboxing if the input aspect ratio is wider than the output aspect ratio. ![]() If you want to avoid upscaling see the example below.
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