Input #0, matroska,webm, from 'OUTPUT/vfr.mkv':
  Metadata:
    ENCODER         : Lavf60.3.100
  Duration: 00:00:00.96, start: 0.000000, bitrate: 91 kb/s
  Stream #0:0: Video: ffv1 (FFV1 / 0x31564646), bgr0(pc, gbr/unknown/unknown, progressive), 320x180, 25 fps, 25 tbr, 1k tbn
    Metadata:
      ENCODER         : Lavc60.3.100 ffv1
      DURATION        : 00:00:00.960000000
Stream mapping:
  Stream #0:0 -> #0:0 (ffv1 (native) -> wrapped_avframe (native))
[Parsed_showinfo_0 @ 0x13f00a120] config in time_base: 1/1000, frame_rate: 25/1
[Parsed_showinfo_0 @ 0x13f00a120] config out time_base: 0/0, frame_rate: 0/0
[Parsed_showinfo_0 @ 0x13f00a120] n:   0 pts:      0 pts_time:0       duration:     40 duration_time:0.04    pos:      630 fmt:bgr0 sar:0/1 s:320x180 i:P iskey:1 type:I checksum:BD8398CC plane_checksum:[BD8398CC] mean:[57] stdev:[53.9]
[Parsed_showinfo_0 @ 0x13f00a120] color_range:pc color_space:gbr color_primaries:unknown color_trc:unknown
Output #0, null, to 'pipe:':
  Metadata:
    encoder         : Lavf60.3.100
  Stream #0:0: Video: wrapped_avframe, bgr0(pc, gbr/unknown/unknown, progressive), 320x180, q=2-31, 200 kb/s, 25 fps, 25 tbn
    Metadata:
      DURATION        : 00:00:00.960000000
      encoder         : Lavc60.3.100 wrapped_avframe
frame=    0 fps=0.0 q=-0.0 size=       0kB time=00:00:00.00 bitrate=N/A speed=N/A    
[Parsed_showinfo_0 @ 0x13f00a120] n:   1 pts:     40 pts_time:0.04    duration:     40 duration_time:0.04    pos:     1895 fmt:bgr0 sar:0/1 s:320x180 i:P iskey:0 type:I checksum:3C0C16CF plane_checksum:[3C0C16CF] mean:[62] stdev:[54.0]
[Parsed_showinfo_0 @ 0x13f00a120] color_range:pc color_space:gbr color_primaries:unknown color_trc:unknown
[Parsed_showinfo_0 @ 0x13f00a120] n:   2 pts:    120 pts_time:0.12    duration:     40 duration_time:0.04    pos:     3162 fmt:bgr0 sar:0/1 s:320x180 i:P iskey:0 type:I checksum:6EFABA5C plane_checksum:[6EFABA5C] mean:[65] stdev:[52.7]
[Parsed_showinfo_0 @ 0x13f00a120] color_range:pc color_space:gbr color_primaries:unknown color_trc:unknown
[Parsed_showinfo_0 @ 0x13f00a120] n:   3 pts:    280 pts_time:0.28    duration:     40 duration_time:0.04    pos:     4459 fmt:bgr0 sar:0/1 s:320x180 i:P iskey:0 type:I checksum:7219691F plane_checksum:[7219691F] mean:[70] stdev:[53.9]
[Parsed_showinfo_0 @ 0x13f00a120] color_range:pc color_space:gbr color_primaries:unknown color_trc:unknown
[Parsed_showinfo_0 @ 0x13f00a120] n:   4 pts:    320 pts_time:0.32    duration:     40 duration_time:0.04    pos:     5784 fmt:bgr0 sar:0/1 s:320x180 i:P iskey:0 type:I checksum:024A0DC4 plane_checksum:[024A0DC4] mean:[72] stdev:[52.2]
[Parsed_showinfo_0 @ 0x13f00a120] color_range:pc color_space:gbr color_primaries:unknown color_trc:unknown
[Parsed_showinfo_0 @ 0x13f00a120] n:   5 pts:    600 pts_time:0.6     duration:     40 duration_time:0.04    pos:     7146 fmt:bgr0 sar:0/1 s:320x180 i:P iskey:0 type:I checksum:1A22B048 plane_checksum:[1A22B048] mean:[76] stdev:[54.8]
[Parsed_showinfo_0 @ 0x13f00a120] color_range:pc color_space:gbr color_primaries:unknown color_trc:unknown
[Parsed_showinfo_0 @ 0x13f00a120] n:   6 pts:    640 pts_time:0.64    duration:     40 duration_time:0.04    pos:     8465 fmt:bgr0 sar:0/1 s:320x180 i:P iskey:0 type:I checksum:E0AD6014 plane_checksum:[E0AD6014] mean:[80] stdev:[56.3]
[Parsed_showinfo_0 @ 0x13f00a120] color_range:pc color_space:gbr color_primaries:unknown color_trc:unknown
[Parsed_showinfo_0 @ 0x13f00a120] n:   7 pts:    920 pts_time:0.92    duration:     40 duration_time:0.04    pos:     9752 fmt:bgr0 sar:0/1 s:320x180 i:P iskey:0 type:I checksum:2901D1D8 plane_checksum:[2901D1D8] mean:[84] stdev:[59.7]
[Parsed_showinfo_0 @ 0x13f00a120] color_range:pc color_space:gbr color_primaries:unknown color_trc:unknown
frame=    8 fps=0.0 q=-0.0 Lsize=N/A time=00:00:00.00 bitrate=N/A speed=   0x    
video:4kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
