[FFmpeg-trac] #6506(undetermined:new): gdv: black screen

FFmpeg trac at avcodec.org
Thu Jun 29 21:04:26 EEST 2017


#6506: gdv: black screen
-------------------------------------+-------------------------------------
               Reporter:  ami_stuff  |                  Owner:
                   Type:  defect     |                 Status:  new
               Priority:  normal     |              Component:
                Version:             |  undetermined
  unspecified                        |               Keywords:
             Blocked By:             |               Blocking:
Reproduced by developer:  0          |  Analyzed by developer:  0
-------------------------------------+-------------------------------------
 https://files.fm/u/surrwqqv

 also with this video some artefacts are visible:

 http://cd.textfiles.com/cdzone/cdzone36/GDV/LOC0/CLIMBACK.GDV

 (I added some debug info about compression number to the log output)


 {{{
 C:\>ffmpeg -i I:\SS6P1_S.GDV out.avi
 ffmpeg version 3.3.git Copyright (c) 2000-2017 the FFmpeg developers
   built with gcc 4.6.2 (GCC)
   configuration: --disable-pthreads --enable-gpl --disable-ffprobe
   libavutil      55. 67.100 / 55. 67.100
   libavcodec     57.100.102 / 57.100.102
   libavformat    57. 75.100 / 57. 75.100
   libavdevice    57.  7.100 / 57.  7.100
   libavfilter     6. 94.100 /  6. 94.100
   libswscale      4.  7.101 /  4.  7.101
   libswresample   2.  8.100 /  2.  8.100
   libpostproc    54.  6.100 / 54.  6.100
 [gdv @ 0235d7c0] Warning: not compiled with thread support, using thread
 emulati
 on
 [pcm_u8 @ 024c8560] Warning: not compiled with thread support, using
 thread emul
 ation
 Guessed Channel Layout for Input Stream #0.1 : mono
 Input #0, gdv, from 'I:\SS6P1_S.GDV':
   Duration: 00:01:07.75, start: 0.000000, bitrate: 1605 kb/s
     Stream #0:0: Video: gdv, pal8, 640x170, 12 fps, 12 tbr, 12 tbn, 12 tbc
     Stream #0:1: Audio: pcm_u8, 22050 Hz, mono, u8, 176 kb/s
 [gdv @ 024e5100] Warning: not compiled with thread support, using thread
 emulati
 on
 [pcm_u8 @ 024c9b00] Warning: not compiled with thread support, using
 thread emul
 ation
 Stream mapping:
   Stream #0:0 -> #0:0 (gdv (native) -> mpeg4 (native))
   Stream #0:1 -> #0:1 (pcm_u8 (native) -> ac3 (native))
 Press [q] to stop, [?] for help
 [ac3 @ 024ca200] Warning: not compiled with thread support, using thread
 emulati
 on
 [gdv @ 024e5100] compression 2
 [mpeg4 @ 02575940] Warning: not compiled with thread support, using thread
 emula
 tion
 Output #0, avi, to 'out.avi':
   Metadata:
     ISFT            : Lavf57.75.100
     Stream #0:0: Video: mpeg4 (FMP4 / 0x34504D46), yuv420p, 640x170,
 q=2-31, 200
  kb/s, 12 fps, 12 tbn, 12 tbc
     Metadata:
       encoder         : Lavc57.100.102 mpeg4
     Side data:
       cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: -1
     Stream #0:1: Audio: ac3 ([0] [0][0] / 0x2000), 22050 Hz, mono, fltp,
 96 kb/s

     Metadata:
       encoder         : Lavc57.100.102 ac3
 [gdv @ 024e5100] compression 2
     Last message repeated 333 times
 frame=  335 fps=0.0 q=2.0 size=     266kB time=00:00:27.91 bitrate=
 78.0kbits/s
 [gdv @ 024e5100] compression 2
     Last message repeated 338 times
 frame=  674 fps=0.0 q=2.0 size=     778kB time=00:00:56.16 bitrate=
 113.4kbits/s
 [gdv @ 024e5100] compression 2
     Last message repeated 130 times
 [gdv @ 024e5100] compression 3
     Last message repeated 7 times
 frame=  813 fps=676 q=2.0 Lsize=     976kB time=00:01:07.77 bitrate=
 117.9kbits/
 s speed=56.3x
 video:130kB audio:794kB subtitle:0kB other streams:0kB global headers:0kB
 muxing
  overhead: 5.585867%
 }}}

--
Ticket URL: <https://trac.ffmpeg.org/ticket/6506>
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