[FFmpeg-trac] #7767(undetermined:new): FFmpeg return wrong FPS value

[FFmpeg]

#7767: FFmpeg return wrong FPS value
-------------------------------------+-------------------------------------
             Reporter:  Atarikid     |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:  git-
  undetermined                       |  master
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 In some cases FFmpeg returns a wrong (negative) FPS.
 This can lead to all sort of issues.

 FFmpeg log:

 atarimbs:~ atari$ /Users/atari/Desktop/ffmpeg -i /Users/atari/Desktop/fps\
 error.mkv
 ffmpeg version N-93020-g3224d6691c-tessus  https://evermeet.cx/ffmpeg/
 Copyright (c) 2000-2019 the FFmpeg developers
   built with Apple LLVM version 10.0.0 (clang-1000.11.45.5)
   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-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. 26.100 / 56. 26.100
   libavcodec     58. 44.100 / 58. 44.100
   libavformat    58. 26.100 / 58. 26.100
   libavdevice    58.  6.101 / 58.  6.101
   libavfilter     7. 48.100 /  7. 48.100
   libswscale      5.  4.100 /  5.  4.100
   libswresample   3.  4.100 /  3.  4.100
   libpostproc    55.  4.100 / 55.  4.100
 Guessed Channel Layout for Input Stream #0.0 : mono
 Input #0, matroska,webm, from '/Users/atari/Desktop/fps error.mkv':
   Metadata:
     encoder         : GStreamer plugin version 0.10.14
     creation_time   : 2018-06-03T17:24:09.000000Z
   Duration: 00:00:10.20, start: 0.284000, bitrate: 2280 kb/s
     Stream #0:0(eng): Audio: pcm_s16le, 8000 Hz, mono, s16, 128 kb/s
 (default)
     Metadata:
       title           : Audio
     Stream #0:1(eng): Video: mpeg4 (Advanced Simple Profile) (DIVX /
 0x58564944), yuv420p, 720x576 [SAR 1:1 DAR 5:4], -30000.00 fps, 1k tbr, 1k
 tbn, 30k tbc (default)
     Metadata:
       title           : Video
 At least one output file must be specified

 As you may notice, this example returns a FPS value of -30000,0

 Example file attached

--
Ticket URL: <https://trac.ffmpeg.org/ticket/7767>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker