Human readability: ffprobe vs metadata.py (metadata.py is part of https://github.com/zmwangx/storyboard ). The video used for comparison is http://podcasts.apple.com/apple_keynotes_1080p/2015/2015_mar_1080_cc.m4v .

ffprobe

> ffprobe -hide_banner 2015_mar_1080_cc.m4v
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '2015_mar_1080_cc.m4v':
  Metadata:
    major_brand     : qt
    minor_version   : 537199360
    compatible_brands: qt
    creation_time   : 2015-03-11 21:24:42
  Duration: 01:34:45.27, start: 0.000000, bitrate: 8561 kb/s
    Stream #0:0(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 98 kb/s (default)
    Metadata:
      creation_time   : 2015-03-11 21:24:42
      handler_name    : Apple Alias Data Handler
    Stream #0:1(eng): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv, bt709), 1920x1080, 8453 kb/s, 29.97 fps, 29.97 tbr, 30k tbn, 60k tbc (default)
    Metadata:
      creation_time   : 2015-03-11 21:24:42
      handler_name    : Apple Alias Data Handler
      encoder         : H.264
    Stream #0:2(eng): Subtitle: eia_608 (c608 / 0x38303663), 640x360, 2 kb/s (default)
    Metadata:
      rotate          : -0
      creation_time   : 2015-03-11 21:24:42
      handler_name    : Apple Alias Data Handler

metadata

> metadata 2015_mar_1080_cc.m4v
Filename:               2015_mar_1080_cc.m4v
File size:              6083965352 (5.67GiB)
Container format:       MPEG-4 Part 14 (M4V)
Duration:               01:34:45.27
Pixel dimensions:       1920x1080
Display aspect ratio:   16:9
Scan type:              Progressive scan
Frame rate:             29.97 fps
Streams:
    #0: Audio (eng), AAC (Low Complexity), 99 kb/s
    #1: Video, H.264 (Main Profile level 4.1), 1920x1080 (DAR 16:9), 29.97 fps, 8453 kb/s
    #2: Subtitle (eng), closed caption (EIA-608 / CEA-708)