[FFmpeg-trac] #6209(undetermined:new): lagarith decoder is not bitexact

[FFmpeg]

#6209: lagarith decoder is not bitexact
-------------------------------------+-------------------------------------
               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
-------------------------------------+-------------------------------------
 what I did to test:

 1. created rawvideo rgb24 "input.avi" file

 2. ffmpeg -i input.avi -f rawvideo input.raw

 3. imported "input.avi" file into VirtualDub and encoded it as lagarith
 rgb (default) - lararith.avi

 4. ffmpeg -i lagarith.avi -f rawvideo lagarith.raw

 5. compared input.raw with lagarith.raw - files are not identical

 6. imported "lagarith.avi" into VirtualDub and decoded it to rawvideo
 rgb24 - lagadec.avi

 7. ffmpeg -i lagadec.avi -f rawvideo lagadec.raw

 8. compared input.raw with lagadec.raw - files are identical


 {{{
 C:\>ffmpeg -i C:\lagarith.avi out.avi
 ffmpeg version 3.2.git Copyright (c) 2000-2017 the FFmpeg developers
   built with gcc 4.6.2 (GCC)
   configuration: --disable-pthreads --disable-ffprobe --enable-gpl
   libavutil      55. 47.100 / 55. 47.100
   libavcodec     57. 81.100 / 57. 81.100
   libavformat    57. 66.102 / 57. 66.102
   libavdevice    57.  2.100 / 57.  2.100
   libavfilter     6. 74.100 /  6. 74.100
   libswscale      4.  3.101 /  4.  3.101
   libswresample   2.  4.100 /  2.  4.100
   libpostproc    54.  2.100 / 54.  2.100
 [lagarith @ 0237d5e0] Warning: not compiled with thread support, using
 thread em
 ulation
 Input #0, avi, from 'C:\lagarith.avi':
   Duration: 00:00:03.20, start: 0.000000, bitrate: 6636 kb/s
     Stream #0:0: Video: lagarith (LAGS / 0x5347414C), rgb24, 500x500, 6827
 kb/s,
  10 fps, 10 tbr, 10 tbn, 10 tbc
 [lagarith @ 0271fce0] Warning: not compiled with thread support, using
 thread em
 ulation
 [mpeg4 @ 02374c40] Warning: not compiled with thread support, using thread
 emula
 tion
 Output #0, avi, to 'out.avi':
   Metadata:
     ISFT            : Lavf57.66.102
     Stream #0:0: Video: mpeg4 (FMP4 / 0x34504D46), yuv420p, 500x500,
 q=2-31, 200
  kb/s, 10 fps, 10 tbn, 10 tbc
     Metadata:
       encoder         : Lavc57.81.100 mpeg4
     Side data:
       cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: -1
 Stream mapping:
   Stream #0:0 -> #0:0 (lagarith (native) -> mpeg4 (native))
 Press [q] to stop, [?] for help
 frame=   32 fps=0.0 q=25.7 Lsize=     268kB time=00:00:03.20 bitrate=
 685.2kbits
 /s speed=12.8x
 video:261kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB
 muxing o
 verhead: 2.418098%
 }}}

--
Ticket URL: <https://trac.ffmpeg.org/ticket/6209>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker