Jumping mp4 playback

[cgbug]

Sample:
​https://www.datafilehost.com/d/e39422f3

Video jumps forward at 0:02 (to 0:10), and then hangs for a few seconds at 0:12.

Interestingly, if I cut a sample, then it plays smoothly.
Also plays ok with VLC 3.0.3.

ffmpeg version N-91646-g78d4b6bd43 Copyright (c) 2000-2018 the FFmpeg developers
  built with gcc 8.2.1 (GCC) 20180813
  configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-amf --enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth
  libavutil      56. 19.100 / 56. 19.100
  libavcodec     58. 23.100 / 58. 23.100
  libavformat    58. 17.103 / 58. 17.103
  libavdevice    58.  4.101 / 58.  4.101
  libavfilter     7. 26.100 /  7. 26.100
  libswscale      5.  2.100 /  5.  2.100
  libswresample   3.  2.100 /  3.  2.100
  libpostproc    55.  2.100 / 55.  2.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'tiger.mp4':
  Metadata:
    major_brand     : iso5
    minor_version   : 1
    compatible_brands: avc1iso5dsmsmsixdash
    encoder         : Lavf56.40.101
  Duration: 00:02:24.37, start: -0.046440, bitrate: 1093 kb/s
    Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 5 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 0 kb/s (default)
    Metadata:
      handler_name    : SoundHandler

[Carl Eugen Hoyos]

How was the sample created?

[cgbug]

I don't know. I suspect some download utility for web videos.

MediaInfo shows: Writing application Lavf56.40.101

[Carl Eugen Hoyos]

Looks like a regression since 4a9d32baca3af0d1831f9556a922c7ab5b426b10

[Carl Eugen Hoyos]

Maybe related to ticket #7236.

[Carl Eugen Hoyos]

Another sample is in ​http://samples.ffmpeg.org/ffmpeg-bugs/trac/ticket7389/

[Carl Eugen Hoyos]

Fixed by John Stebbins in 21a65d63109628276a8fa88f8e6a106696506dc9