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Letterboxing with FFmpeg (Aspect Ratio) - The Digital FAQ

ffmpeg -i /downloads/dvd/movie/file-1-1.vob -s 352x288 -r 25 -ac 2 -ar 44100 -ab 128 -b 890 -minrate 300 -maxrate 2500 -aspect 4:3 -g 18 ...

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