How to convert a video to 16:9 widescreen format aspect ratio | Max screen size, no padding
Today, we show how to convert a video to 16:9 widescreen using ffmpeg, maximizing size, with no black padding. While the example converts a 4:3 video to a 16:9 video, the same technique can also be used to convert from / to any formats so that you get the right aspect ratio and size, maximizing screen space with no padding black bars.
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EXAMPLES
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❶ Converting a video to 16:9 aspect ratio (HD, 1280 x 720), maximizing size with no black padding
→ ffmpeg -i input.mp4 -vf "scale=(iw*sar)*max(1280/(iw*sar)\,720/ih):ih*max(1280/(iw*sar)\,720/ih), crop=1280:720" output01.mp4
with:
*scale = FFMPEG video filter to resize a video
(iw*sar)*max(1280/(iw*sar)\,720/ih) = output width of the resized video = Resize width of video to at least 1280 (keeping original aspect ratio)
ih*max(1280/(iw*sar)\,720/ih) = output height of the resized video = Resize width of video to at least 720 (keeping original aspect ratio)
The scale transformation is then followed (chained) by a crop video filter:
crop = FFMPEG video filter to cut part of a video
1280 = The cropping width (around the reference point) for the output video
720 = The cropping height (around the reference point) for the output video
Note: In this scenario (2 parameters only for the crop video filter), the reference point is the center of the input video
❷ Converting a video to 16:9 aspect ratio (FHD, 1920 x 1080), maximizing size with no black padding
→ ffmpeg -i input.mp4 -vf "scale=(iw*sar)*max(1920/(iw*sar)\,1080/ih):ih*max(1920/(iw*sar)\,1080/ih), crop=1920:1080" output02.mp4
with:
*scale = FFMPEG video filter to resize a video
(iw*sar)*max(1920/(iw*sar)\,1080/ih) = output width of the resized video = Resize width of video to at least 1920 (keeping original aspect ratio)
ih*max(1920/(iw*sar)\,1080/ih) = output height of the resized video = Resize width of video to at least 1080 (keeping original aspect ratio)
The scale transformation is then followed (chained) by a crop video filter:
crop = FFMPEG video filter to cut part of a video
1920 = The cropping width (around the reference point) for the output video
1080 = The cropping height (around the reference point) for the output video
Note: In this scenario (2 parameters only for the crop video filter), the reference point is the center of the input video
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MUSIC
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