FFmpeg - Scale and Letterbox: Difference between revisions
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[[Category:FFmpeg]] | |||
[[Category:Video Scaling]] | |||
<pre> | <pre> | ||
ffmpeg -i <input.file> -c:v libx264 -filter:v "scale=(iw*sar)*min(640/(iw*sar)\,480/ih):ih*min(640/(iw*sar)\,480/ih), pad=640:480:(640-iw*min(640/iw\,480/ih))/2:(480-ih*min(640/iw\,480/ih))/2" -f mp4 <output.file> | ffmpeg -i <input.file> -c:v libx264 -filter:v "scale=(iw*sar)*min(640/(iw*sar)\,480/ih):ih*min(640/(iw*sar)\,480/ih), pad=640:480:(640-iw*min(640/iw\,480/ih))/2:(480-ih*min(640/iw\,480/ih))/2" -f mp4 <output.file> | ||
Latest revision as of 12:41, 6 March 2025
ffmpeg -i <input.file> -c:v libx264 -filter:v "scale=(iw*sar)*min(640/(iw*sar)\,480/ih):ih*min(640/(iw*sar)\,480/ih), pad=640:480:(640-iw*min(640/iw\,480/ih))/2:(480-ih*min(640/iw\,480/ih))/2" -f mp4 <output.file>
Reference: FFMPEG - Encoding Optimal Videos for Streaming#Change_Resolution_and_add_Letterbox
Reference: [stackoverflow: Proper way to letterbox with ffmpeg]
