[FFmpeg-trac] #8854(undetermined:new): Theora encoding is broken in FFmpeg 64 bits

[FFmpeg]

#8854: Theora encoding is broken in FFmpeg 64 bits
-------------------------------------+-------------------------------------
             Reporter:  fireattack   |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:  git-
  undetermined                       |  master
             Keywords:  libtheora    |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Basically the same bug as #8040 described, the output video is choppy and
 pixelated.

 Summary of the bug:
 How to reproduce:
 {{{
 D:\!test>ffmpeg -i a.mp4 -c:v libtheora -q:v 10 -an -t 5 output.ogv -y
 ffmpeg version git-2020-08-16-5df9724 Copyright (c) 2000-2020 the FFmpeg
 developers
   built with gcc 10.2.1 (GCC) 20200805
   configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-
 fontconfig --enable-gnutls --enable-iconv --enabl
 e-libass --enable-libdav1d --enable-libbluray --enable-libfreetype
 --enable-libmp3lame --enable-libopencore-amrnb --enab
 le-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-
 libshine --enable-libsnappy --enable-libsoxr --enabl
 e-libsrt --enable-libtheora --enable-libtwolame --enable-libvpx --enable-
 libwavpack --enable-libwebp --enable-libx264 --
 enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-
 zlib --enable-gmp --enable-libvidstab --enable-l
 ibvmaf --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa
 --enable-libspeex --enable-libxvid --enable-libaom
 --enable-libgsm --enable-librav1e --enable-libsvtav1 --disable-w32threads
 --enable-libmfx --enable-ffnvcodec --enable-cu
 da-llvm --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec
 --enable-dxva2 --enable-avisynth --enable-libopenm
 pt --enable-amf
   libavutil      56. 58.100 / 56. 58.100
   libavcodec     58.100.100 / 58.100.100
   libavformat    58. 51.100 / 58. 51.100
   libavdevice    58. 11.101 / 58. 11.101
   libavfilter     7. 87.100 /  7. 87.100
   libswscale      5.  8.100 /  5.  8.100
   libswresample   3.  8.100 /  3.  8.100
   libpostproc    55.  8.100 / 55.  8.100
 Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'a.mp4':
   Metadata:
     major_brand     : mp42
     minor_version   : 0
     compatible_brands: mp42mp41iso4
     creation_time   : 2020-07-17T12:25:52.000000Z
   Duration: 00:00:11.68, start: 0.000000, bitrate: 639 kb/s
     Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p,
 1280x720, 506 kb/s, 30 fps, 30 tbr, 600 tbn, 60 t
 bc (default)
     Metadata:
       creation_time   : 2020-07-17T12:25:52.000000Z
       handler_name    : Vireo Eyes v2.5.3
       encoder         : AVC Coding
     Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz,
 stereo, fltp, 128 kb/s (default)
     Metadata:
       creation_time   : 2020-07-17T12:25:52.000000Z
       handler_name    : Vireo Ears v2.5.3
 Stream mapping:
   Stream #0:0 -> #0:0 (h264 (native) -> theora (libtheora))
 Press [q] to stop, [?] for help
 Output #0, ogv, to 'output.ogv':
   Metadata:
     major_brand     : mp42
     minor_version   : 0
     compatible_brands: mp42mp41iso4
     encoder         : Lavf58.51.100
     Stream #0:0(und): Video: theora (libtheora), yuv420p, 1280x720,
 q=2-31, 200 kb/s, 30 fps, 30 tbn, 30 tbc (default)
     Metadata:
       creation_time   : 2020-07-17T12:25:52.000000Z
       handler_name    : Vireo Eyes v2.5.3
       encoder         : Lavc58.100.100 libtheora
       major_brand     : mp42
       minor_version   : 0
       compatible_brands: mp42mp41iso4
 frame=  150 fps= 24 q=-0.0 Lsize=    3080kB time=00:00:05.00
 bitrate=5046.3kbits/s speed=0.808x
 video:3062kB audio:0kB subtitle:0kB other streams:0kB global headers:3kB
 muxing overhead: 0.579831%

 }}}


 Patches should be submitted to the ffmpeg-devel mailing list and not this
 bug tracker.

--
Ticket URL: <https://trac.ffmpeg.org/ticket/8854>
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