[FFmpeg-trac] #9390(undetermined:new): Wrong FPS used for timecode computation mangles timecodes

[FFmpeg]

#9390: Wrong FPS used for timecode computation mangles timecodes
-------------------------------------+-------------------------------------
             Reporter:  Marcelo      |                    Owner:  (none)
  Magnasco                           |
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:
                                     |  undetermined
              Version:  unspecified  |               Resolution:
             Keywords:  timecode     |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
Comment (by Marcelo Magnasco):

 Ohhh, it does not do that in your system? What timecode do you get?

 I'm on a Mac, freshly installed ff* binaries. Maybe it's a Mac-specfic
 bug? I will test from our linux boxes on Monday.

 {{{
 % uname -a
 Darwin xxxx 19.6.0 Darwin Kernel Version 19.6.0: Tue Jan 12 22:13:05 PST
 2021; root:xnu-6153.141.16~1/RELEASE_X86_64 x86_64
 % ffprobe C5GL010008.mp4
 ffprobe version 4.2.1-tessus  https://evermeet.cx/ffmpeg/  Copyright (c)
 2007-2019 the FFmpeg developers
   built with Apple LLVM version 10.0.1 (clang-1001.0.46.4)
   configuration: --cc=/usr/bin/clang --prefix=/opt/ffmpeg --extra-
 version=tessus --enable-avisynth --enable-fontconfig --enable-gpl
 --enable-libaom --enable-libass --enable-libbluray --enable-libdav1d
 --enable-libfreetype --enable-libgsm --enable-libmodplug --enable-
 libmp3lame --enable-libmysofa --enable-libopencore-amrnb --enable-
 libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-
 libopus --enable-librubberband --enable-libshine --enable-libsnappy
 --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame
 --enable-libvidstab --enable-libvmaf --enable-libvo-amrwbenc --enable-
 libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-
 libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-
 libzimg --enable-libzmq --enable-libzvbi --enable-version3 --pkg-config-
 flags=--static --disable-ffplay
   libavutil      56. 31.100 / 56. 31.100
   libavcodec     58. 54.100 / 58. 54.100
   libavformat    58. 29.100 / 58. 29.100
   libavdevice    58.  8.100 / 58.  8.100
   libavfilter     7. 57.100 /  7. 57.100
   libswscale      5.  5.100 /  5.  5.100
   libswresample   3.  5.100 /  3.  5.100
   libpostproc    55.  5.100 / 55.  5.100
 [mov,mp4,m4a,3gp,3g2,mj2 @ 0x7ff3ed808600] Using non-standard frame rate
 59/1
 Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'C5GL010008.mp4':
   Metadata:
     major_brand     : mp41
     minor_version   : 538120216
     compatible_brands: mp41
     creation_time   : 2021-08-27T08:55:37.000000Z
     firmware        : HD9.01.01.60.70
   Duration: 00:00:03.84, start: 0.000000, bitrate: 2842 kb/s
     Stream #0:0(eng): Video: h264 (Main) (avc1 / 0x31637661), yuvj420p(pc,
 bt709), 848x480 [SAR 1:1 DAR 53:30], 2523 kb/s, 59.94 fps, 59.94 tbr, 60k
 tbn, 119.88 tbc (default)
     Metadata:
       creation_time   : 2021-08-27T08:55:37.000000Z
       handler_name    : GoPro AVC
       encoder         : GoPro AVC encoder
       timecode        : 09:04:09:02
     Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz,
 stereo, fltp, 187 kb/s (default)
     Metadata:
       creation_time   : 2021-08-27T08:55:37.000000Z
       handler_name    : GoPro AAC
       timecode        : 09:04:09:02
     Stream #0:2(eng): Data: none (tmcd / 0x64636D74), 0 kb/s (default)
     Metadata:
       creation_time   : 2021-08-27T08:55:37.000000Z
       handler_name    : GoPro TCD
       timecode        : 09:04:09:02
     Stream #0:3(eng): Data: bin_data (gpmd / 0x646D7067), 62 kb/s
 (default)
     Metadata:
       creation_time   : 2021-08-27T08:55:37.000000Z
       handler_name    : GoPro MET
 Unsupported codec with id 0 for input stream 2
 Unsupported codec with id 100359 for input stream 3
 }}}

 Indeed as you state, stream 2 is not supported, this is known, but the
 telemetry stream (gpmd, 3) while unsupported is copied verbatim without
 issue. Those are not my problems.

 Replying to [comment:6 Balling]:
 > Interesting. Ffprobe does not print on your first file that '''here'''!
 Ha. Okay, will test further. Please note that it does not support 2
 streams in it. That is known AFAIK, #8338.
-- 
Ticket URL: <https://trac.ffmpeg.org/ticket/9390#comment:7>
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