[FFmpeg-trac] #7510(undetermined:new): Streamcopy of private stream produces empty output

FFmpeg trac at avcodec.org
Tue Nov 6 22:29:19 EET 2018

#7510: Streamcopy of private stream produces empty output
             Reporter:  msiders      |                    Owner:
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:
              Version:  git-master   |  undetermined
             Keywords:               |               Resolution:
             Blocking:               |               Blocked By:
Analyzed by developer:  0            |  Reproduced by developer:  0

Comment (by msiders):


 I isolated the problem with the '''demuxer''' (mpegts). So the problem is
 not the ''muxer''.

 Here one command to reproduce the problem:

 % ffmpeg \
  -f mpegts -i file.ts \
  -map i:109 \
  -codec copy \
  -f data file-out.raw

 In this case the pid 109 is the one with the private data. And when
 executing it the "file-out.raw" is '''empty'''. So the problem is that the
 demuxer doesn't read "private data" streams.

 The output is:

 Input #0, mpegts, from 'file.ts':
   Duration: 00:10:27.88, start: 8592.918144, bitrate: 20857 kb/s
   Program 201
       service_name    : Program 1
       service_provider: FFMPEG
     Stream #0:0[0x064]: Video: h264 (High) ([27][0][0][0] / 0x001B),
 yuv420p(tv, bt709, top first), 1920x1080 [SAR 1:1 DAR 16:9], 2
 5 fps, 50 tbr, 90k tbn, 50 tbc
     Stream #0:1[0x065](qaa): Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz,
 stereo, fltp, 192 kb/s
     Stream #0:2[0x069](eng,eng): Subtitle: dvb_teletext ([6][0][0][0] /
     Stream #0:3[0x06d]: Data: bin_data ([6][0][0][0] / 0x0006)
 File 'file-out.raw' already exists. Overwrite ? [y/N] y
 Output #0, data, to 'file-out.raw':
     encoder         : Lavf58.22.100
     Stream #0:0: Data: bin_data ([6][0][0][0] / 0x0006)
 Stream mapping:
   Stream #0:3 -> #0:0 (copy)
 Press [q] to stop, [?] for help
 size=       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
 Output file is empty, nothing was encoded (check -ss / -t / -frames
 parameters if used)

Ticket URL: <https://trac.ffmpeg.org/ticket/7510#comment:5>
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