[FFmpeg-trac] #8451(undetermined:new): Input seeking mpegts with copyts then "-to" generates 0kb result

[FFmpeg]

#8451: Input seeking mpegts with copyts then "-to" generates 0kb result
-------------------------------------+-------------------------------------
             Reporter:  fireattack   |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:
  undetermined                       |  unspecified
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Summary of the bug:
 How to reproduce:
 {{{
 D:\>ffmpeg -ss 00:00:30 -i b.ts -to 00:00:40 -c copy -copyts c.ts
 ffmpeg version N-94960-g53d31e91c5 Copyright (c) 2000-2019 the FFmpeg
 developers
   built with gcc 9.1.1 (GCC) 20190807
   configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-
 fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-
 libdav1d --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-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc
 --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt
 --enable-amf
   libavutil      56. 35.100 / 56. 35.100
   libavcodec     58. 57.100 / 58. 57.100
   libavformat    58. 32.104 / 58. 32.104
   libavdevice    58.  9.100 / 58.  9.100
   libavfilter     7. 58.102 /  7. 58.102
   libswscale      5.  6.100 /  5.  6.100
   libswresample   3.  6.100 /  3.  6.100
   libpostproc    55.  6.100 / 55.  6.100
 Input #0, mpegts, from 'b.ts':
   Duration: 00:01:00.50, start: 60.941333, bitrate: 14377 kb/s
   Program 1
     Metadata:
       service_name    : Service01
       service_provider: FFmpeg
     Stream #0:0[0x100]: Video: mpeg2video (Main) ([2][0][0][0] / 0x0002),
 yuv420p(tv, bt709, top first), 1440x1080 [SAR 4:3 DAR 16:9], 29.97 fps,
 29.97 tbr, 90k tbn, 59.94 tbc
     Stream #0:1[0x101](und): Audio: aac (LC) ([15][0][0][0] / 0x000F),
 48000 Hz, stereo, fltp, 255 kb/s
 Output #0, mpegts, to 'c.ts':
   Metadata:
     encoder         : Lavf58.32.104
     Stream #0:0: Video: mpeg2video (Main) ([2][0][0][0] / 0x0002),
 yuv420p(tv, bt709, top first), 1440x1080 [SAR 4:3 DAR 16:9], q=2-31, 29.97
 fps, 29.97 tbr, 90k tbn, 90k tbc
     Stream #0:1(und): Audio: aac (LC) ([15][0][0][0] / 0x000F), 48000 Hz,
 stereo, fltp, 255 kb/s
 Stream mapping:
   Stream #0:0 -> #0:0 (copy)
   Stream #0:1 -> #0:1 (copy)
 Press [q] to stop, [?] for help
 frame=    0 fps=0.0 q=-1.0 Lsize=       0kB time=00:00:00.00 bitrate=N/A
 speed=   0x
 video:0kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB
 muxing overhead: unknown
 }}}

 Expected behavior: it cuts the video between 30 to 40 sec. And it works
 fine on mp4 videos.

 (I followed the example here: http://trac.ffmpeg.org/wiki/Seeking )

 However, for mpegts, it will result in a 0kb file.

--
Ticket URL: <https://trac.ffmpeg.org/ticket/8451>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker