Getting video dimension / resolution / width x height from ffmpeg

Question

How would I get the height and width of a video from ffmpeg\'s information output. For example, with the following output:

$ ffmpeg -i video.mp4         


        

Answer 1

BAD (\d+x\d+)

$ echo 'Stream #0:0(eng): Video: mjpeg (jpeg / 0x6765706A), yuvj420p, 1280x720, 19939 kb/s, 30 fps, 30 tbr, 30 tbn, 30 tbc' | perl -lane 'print $1 if /(\d+x\d+)/'
> 0x6765706

GOOD ([0-9]{2,}x[0-9]+)

$ echo 'Stream #0:0(eng): Video: mjpeg (jpeg / 0x6765706A), yuvj420p, 1280x720, 19939 kb/s, 30 fps, 30 tbr, 30 tbn, 30 tbc' | perl -lane 'print $1 if /([0-9]{2,}x[0-9]+)/'
> 1280x720