hd720 is short for 1280x720

ffmpeg -i MyMovie.mkv -vf scale=-1:720 -c:v libx264 -crf 0 -preset veryslow -c:a copy MyMovie_720p.mkv

ffmpeg -i MyMovie.mkv -vf scale=-1:720 -c:v libx264 -crf 18 -preset veryslow -c:a copy MyMovie_720p.mkv

ffmpeg -i input.mp4 -vf scale=1280:720 -preset slow -crf 18 output.mp4

ffmpeg -i input.mp4 -vf scale=$w:$h [encoding-parameters] output.mp4

ffmpeg -i input.mkv -c:a copy -s 1280x720 output.mkv

ffmpeg -f concat -i mylist.txt -vf -s 1280x720 -c:v libx264 -crf 18 -preset slow -c:a copy MyMovie_720p.mkv -c:a copy output.mp4

ffmpeg -f image2 -i foo-%03d.jpeg -r 12 -s WxH foo.avi

ffmpeg -i /tmp/a.wav -s 640x480 -i /tmp/a.yuv /tmp/a.mpg

ffmpeg -i test1.avi -i test2.avi -vcodec copy -acodec copy -vcodec copy -acodec copy test12.avi -newvideo -newaudio

ffmpeg -i opening.mkv -i episode.mkv -i ending.mkv \

-filter_complex "[0:v] [0:a] [1:v] [1:a] [2:v] [2:a] \

concat=n=3:v=1:a=1 [v] [a]" \

-map "[v]" -map "[a]" output.mkv