gdv: black screen

[ami_stuff]

​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%

[Elon Musk]

Those are not artifacts. that is normal output.

[Elon Musk]

Other files are not palette format.