Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'a.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf56.36.100
  Duration: 00:17:03.44, start: 0.000000, bitrate: 2134 kb/s
    Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1920x1080, 2101 kb/s, 25 fps, 25 tbr, 90k tbn, 50 tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 131 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
Output #0, null, to 'pipe:':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf56.36.100
    Stream #0:0(und): Video: rawvideo (I420 / 0x30323449), yuv420p, 1920x1080, q=2-31, 200 kb/s, 25 fps, 25 tbn, 25 tbc (default)
    Metadata:
      handler_name    : VideoHandler
      encoder         : Lavc56.41.100 rawvideo
Stream mapping:
  Stream #0:0 -> #0:0 (h264 (native) -> rawvideo (native))
Press [q] to stop, [?] for help
[h264 @ 0x7fc46981d200] illegal short term buffer state detected   
[h264 @ 0x7fc46982a400] mmco: unref short failure
[null @ 0x7fc469831c00] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 23352 >= 23352
[h264 @ 0x7fc469832e00] mmco: unref short failure88 bitrate=N/A    
[null @ 0x7fc469831c00] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 24307 >= 24307
frame=24298 fps=334 q=0.0 Lsize=N/A time=00:16:12.32 bitrate=N/A    
video:2278kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown