[FFmpeg-trac] #6340(undetermined:new): utvideo: fix gradient prediction for interlaced video

[FFmpeg]

#6340: utvideo: fix gradient prediction for interlaced video
-------------------------------------+-------------------------------------
               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
-------------------------------------+-------------------------------------
 decodes bit-exact with vfw codec

 https://files.fm/u/8ebkzaug

 {{{
 C:\>ffmpeg -i utv_rgb_int_gradient_8.avi out.avi
 ffmpeg version 3.3.git Copyright (c) 2000-2017 the FFmpeg developers
   built with gcc 4.6.2 (GCC)
   configuration: --disable-asm --disable-pthreads --enable-gpl --disable-
 ffprobe

   libavutil      55. 61.100 / 55. 61.100
   libavcodec     57. 93.100 / 57. 93.100
   libavformat    57. 72.101 / 57. 72.101
   libavdevice    57.  7.100 / 57.  7.100
   libavfilter     6. 85.100 /  6. 85.100
   libswscale      4.  7.101 /  4.  7.101
   libswresample   2.  8.100 /  2.  8.100
   libpostproc    54.  6.100 / 54.  6.100
 [utvideo @ 0222cd78] Warning: not compiled with thread support, using
 thread emu
 lation
 Input #0, avi, from 'utv_rgb_int_gradient_8.avi':
   Duration: 00:00:03.20, start: 0.000000, bitrate: 10899 kb/s
     Stream #0:0: Video: utvideo (ULRG / 0x47524C55), rgb24, 500x500, 11227
 kb/s,
  10 fps, 10 tbr, 10 tbn, 10 tbc
 [utvideo @ 0233aba8] Warning: not compiled with thread support, using
 thread emu
 lation
 Stream mapping:
   Stream #0:0 -> #0:0 (utvideo (native) -> mpeg4 (native))
 Press [q] to stop, [?] for help
 [mpeg4 @ 0233c1f0] Warning: not compiled with thread support, using thread
 emula
 tion
 Output #0, avi, to 'out.avi':
   Metadata:
     ISFT            : Lavf57.72.101
     Stream #0:0: Video: mpeg4 (FMP4 / 0x34504D46), yuv420p, 500x500,
 q=2-31, 200
  kb/s, 10 fps, 10 tbn, 10 tbc
     Metadata:
       encoder         : Lavc57.93.100 mpeg4
     Side data:
       cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: -1
 frame=   32 fps=0.0 q=31.0 Lsize=     317kB time=00:00:03.20 bitrate=
 812.7kbits
 /s speed=6.61x
 video:311kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB
 muxing o
 verhead: 2.030940%
 }}}

--
Ticket URL: <https://trac.ffmpeg.org/ticket/6340>
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