How to extract video as mp4 from VCD

$ cat /Volumes/SZ1AS_B/MPEGAV/*.dat | ffmpeg -i - ~/English_01_B.mp4

# wmv to mp4
$ ffmpeg -i input.wmv -c:v libx264 -crf 23 -profile:v high -r 30 -c:a libfaac -q:a 100 -ar 48000 output.mp4