Convert avi files to mp4 using ffmpeg

ffmpeg -i input.avi -f mp4 -strict experimental -vcodec mpeg4 -maxrate 1000 -b 700 -qmin 3 -qmax 5 -bufsize 4096 -g 300 -acodec aac -ab 192 -s 320x240 -aspect 4:3 output.mp4





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