[FFmpeg-trac] #8874(ffmpeg:new): mp4 mixer indicates Variable Frame Rate

[FFmpeg]

#8874: mp4 mixer indicates Variable Frame Rate
-------------------------------------+-------------------------------------
             Reporter:  RCJetPilot   |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:  ffmpeg       |                  Version:
                                     |  unspecified
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 If I use the following command

 ~/ffmpeg_sources/ffmpeg/ffmpeg -i /Volumes/VOLUME01/Chris/sample.ts -c
 copy /Volumes/VOLUME01/Chris/sample.mp4

 The reported frame rate mode is variable (this is a problem for our
 editing systems)

 If I modify that command to :

 ~/ffmpeg_sources/ffmpeg/ffmpeg -i /Volumes/VOLUME01/Chris/sample.ts -c
 copy -f segment -segment_time 09:00:00 -reset_timestamps 1
 /Volumes/VOLUME01/Chris/sample%03d.mp4


 It reports constant frame rate and works fine in our editing systems


 I am using mediinfo to confirm these issues..

 Here is my output
 ~/ffmpeg_sources/ffmpeg/ffmpeg -i /Volumes/VOLUME01/Chris/sample.ts -c
 copy -f segment -segment_time 09:00:00 -reset_timestamps 1
 /Volumes/VOLUME01/Chris/sample%03d.mp4
 ffmpeg version N-98896-g0d46043 Copyright (c) 2000-2020 the FFmpeg
 developers
   built with gcc 4.8.5 (GCC) 20150623 (Red Hat 4.8.5-39)
   configuration: --prefix=/root/ffmpeg_build --pkg-config-flags=--static
 --extra-cflags=-I/root/ffmpeg_build/include --extra-
 ldflags=-L/root/ffmpeg_build/lib --extra-libs=-lpthread --extra-libs=-lm
 --bindir=/root/bin --enable-gpl --enable-libfdk_aac --enable-libfreetype
 --enable-libmp3lame --enable-libopus --enable-libvpx --enable-libx264
 --enable-libx265 --enable-nonfree
   libavutil      56. 58.100 / 56. 58.100
   libavcodec     58.101.100 / 58.101.100
   libavformat    58. 51.101 / 58. 51.101
   libavdevice    58. 11.101 / 58. 11.101
   libavfilter     7. 87.100 /  7. 87.100
   libswscale      5.  8.100 /  5.  8.100
   libswresample   3.  8.100 /  3.  8.100
   libpostproc    55.  8.100 / 55.  8.100
 Input #0, mpegts, from '/Volumes/VOLUME01/Chris/sample.ts':
   Duration: 00:02:00.02, start: 1.413333, bitrate: 12478 kb/s
   Program 1
     Metadata:
       service_name    : Service01
       service_provider: FFmpeg
     Stream #0:0[0x100]: Video: h264 (High) ([27][0][0][0] / 0x001B),
 yuv420p(progressive), 1280x720 [SAR 1:1 DAR 16:9], 59.94 fps, 59.94 tbr,
 90k tbn, 119.88 tbc
     Stream #0:1[0x101]: Audio: aac (LC) ([15][0][0][0] / 0x000F), 48000
 Hz, stereo, fltp, 127 kb/s
 [segment @ 0x452a640] Opening '/Volumes/VOLUME01/Chris/sample000.mp4' for
 writing
 Output #0, segment, to '/Volumes/VOLUME01/Chris/sample%03d.mp4':
   Metadata:
     encoder         : Lavf58.51.101
     Stream #0:0: Video: h264 (High) ([27][0][0][0] / 0x001B),
 yuv420p(progressive), 1280x720 [SAR 1:1 DAR 16:9], q=2-31, 59.94 fps,
 59.94 tbr, 60k tbn, 59.94 tbc
     Stream #0:1: Audio: aac (LC) ([15][0][0][0] / 0x000F), 48000 Hz,
 stereo, fltp, 127 kb/s
 Stream mapping:
   Stream #0:0 -> #0:0 (copy)


 Also the file uploaded has been renamed from sample.ts to
 VariableFrameRate.ts

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Ticket URL: <https://trac.ffmpeg.org/ticket/8874>
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