Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '1.mp4':
  Duration: 00:03:02.9, start: 0.000000, bitrate: 722 kb/s
  Stream #0.0(und): Video: h264, yuv420p, 320x240, 25.00 fps(r)
  Stream #0.1(und): Audio: aac, 44100 Hz, stereo


Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '2.mp4':
  Duration: 00:00:22.0, start: 0.000000, bitrate: 707 kb/s
  Stream #0.0(und): Video: h264, yuv420p, 320x240, 25.00 fps(r)
  Stream #0.1(und): Audio: aac, 44100 Hz, stereo