[FFmpeg-user] Meaning of ffprobe output

[Ulf Zibis]

Hi,

Am 18.01.19 um 16:44 schrieb Carl Eugen Hoyos:

> One possibility is to add "-f null -".

Thanks!

from the original dvd::rip chunks I get:
=======================

$ ffmpeg -i
"concat:001-C001/CYD-001.vob|001-C002/CYD-001.vob|001-C003/CYD-001.vob|001-C004/CYD-001.vob|001-C005/CYD-001.vob|001-C006/CYD-001.vob|001-C007/CYD-001.vob|001-C008/CYD-001.vob|001-C009/CYD-001.vob|001-C010/CYD-001.vob|001-C011/CYD-001.vob|001-C012/CYD-001.vob|001-C013/CYD-001.vob|001-C014/CYD-001.vob|001-C015/CYD-001.vob|001-C016/CYD-001.vob|001-C017/CYD-001.vob|001-C018/CYD-001.vob|001-C019/CYD-001.vob|001-C020/CYD-001.vob|001-C021/CYD-001.vob|001-C022/CYD-001.vob|001-C023/CYD-001.vob"
-vf idet -f null -
[.....]
Input #0, mpeg, from
'concat:001-C001/CYD-001.vob|001-C002/CYD-001.vob|001-C003/CYD-001.vob|001-C004/CYD-001.vob|001-C005/CYD-001.vob|001-C006/CYD-001.vob|001-C007/CYD-001.vob|001-C008/CYD-001.vob|001-C009/CYD-001.vob|001-C010/CYD-001.vob|001-C011/CYD-001.vob|001-C012/CYD-001.vob|001-C013/CYD-001.vob|001-C014/CYD-001.vob|001-C015/CYD-001.vob|001-C016/CYD-001.vob|001-C017/CYD-001.vob|001-C018/CYD-001.vob|001-C019/CYD-001.vob|001-C020/CYD-001.vob|001-C021/CYD-001.vob|001-C022/CYD-001.vob|001-C023/CYD-001.vob':
  Duration: 00:01:03.16, start: 0.231578, bitrate: 533831 kb/s
    Stream #0:0[0x1e0]: Video: mpeg2video (Main), yuv420p(tv, bt470bg,
top first), 704x576 [SAR 12:11 DAR 4:3], 25 fps, 25 tbr, 90k tbn, 50 tbc
    Stream #0:1[0x80]: Audio: ac3, 48000 Hz, stereo, fltp, 256 kb/s
Stream mapping:
  Stream #0:0 -> #0:0 (mpeg2video (native) -> wrapped_avframe (native))
  Stream #0:1 -> #0:1 (ac3 (native) -> pcm_s16le (native))
Press [q] to stop, [?] for help
Output #0, null, to 'pipe:':
  Metadata:
    encoder         : Lavf58.20.100
    Stream #0:0: Video: wrapped_avframe, yuv420p(top coded first
(swapped)), 704x576 [SAR 12:11 DAR 4:3], q=2-31, 200 kb/s, 25 fps, 25
tbn, 25 tbc
    Metadata:
      encoder         : Lavc58.35.100 wrapped_avframe
    Stream #0:1: Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s
    Metadata:
      encoder         : Lavc58.35.100 pcm_s16le
frame=120012 fps=200 q=-0.0 Lsize=N/A time=01:20:00.51 bitrate=N/A
speed=7.99x   
video:62819kB audio:900096kB subtitle:0kB other streams:0kB global
headers:0kB muxing overhead: unknown
[Parsed_idet_0 @ 0x6144800] Repeated Fields: Neither:119990 Top:    11
Bottom:    11
[Parsed_idet_0 @ 0x6144800] Single frame detection: TFF: 19273 BFF:
13254 Progressive: 42498 Undetermined: 44987
[Parsed_idet_0 @ 0x6144800] Multi frame detection: TFF: 41292 BFF: 20428
Progressive: 58193 Undetermined:    99

Note, that there are no warnings like:
[null @ 0x6afafc0] Application provided invalid, non monotonically
increasing dts to muxer in stream 1: 881664 >= 881664

Also note, that there is "yuv420p(top coded first (swapped))" for the
output, which seems to be lost in the remuxing copy from:
$ ffmpeg -ss 00:03 -t 01:16:20 -i
"concat:001-C001/CYD-001.vob|001-C002/CYD-001.vob|001-C003/CYD-001.vob|001-C004/CYD-001.vob|001-C005/CYD-001.vob|001-C006/CYD-001.vob|001-C007/CYD-001.vob|001-C008/CYD-001.vob|001-C009/CYD-001.vob|001-C010/CYD-001.vob|001-C011/CYD-001.vob|001-C012/CYD-001.vob|001-C013/CYD-001.vob|001-C014/CYD-001.vob|001-C015/CYD-001.vob|001-C016/CYD-001.vob|001-C017/CYD-001.vob|001-C018/CYD-001.vob|001-C019/CYD-001.vob|001-C020/CYD-001.vob|001-C021/CYD-001.vob|001-C022/CYD-001.vob|001-C023/CYD-001.vob"
-c copy CYD_copy.vob

-Ulf