11 -c:v # video codec (-vcodec) - 'copy' to copy stream
12 -c:a # audio codec (-acodec)
16 -fs SIZE # limit file size (bytes)
22 -b:v 1M # video bitrate (1M = 1Mbit/s)
23 -b:a 1M # audio bitrate
29 -aspect RATIO # aspect ratio (4:3, 16:9, or 1.25)
30 -r RATE # frame rate per sec
31 -s WIDTHxHEIGHT # frame size
38 -aq QUALITY # audio quality (codec-specific)
39 -ar 44100 # audio sample rate (hz)
40 -ac 1 # audio channels (1=mono, 2=stereo)
42 -vol N # volume (256=normal)
47 ### Ringtone conversion using ffmpeg
50 ffmpeg -i foo.mp3 -ac 1 -ab 128000 -f mp4 -acodec libfaac -y target.m4r
57 ffmpeg -i input.mov -vcodec h264 -an -strict -2 output.mp4
58 ffmpeg -i input.mov -vcodec libvpx -an output.webm
62 ffmpeg -i input.mov -vcodec h264 -acodec aac -strict -2 output.mp4
63 ffmpeg -i input.mov -vcodec libvpx -acodec libvorbis output.webm
67 <video width="320" height="240" controls>
68 <source src="movie.mp4" type='video/mp4'></source>
69 <source src="movie.webm" type='video/ogg'></source>