[FFmpeg-trac] #979(undetermined:open): Unexpected Color Conversion (bgr->yuv vs rgb->yuv)

[FFmpeg]

#979: Unexpected Color Conversion (bgr->yuv vs rgb->yuv)
-------------------------------------+-------------------------------------
             Reporter:  natt         |                    Owner:
                 Type:  defect       |                   Status:  open
             Priority:  normal       |                Component:
              Version:  git-master   |  undetermined
             Keywords:               |               Resolution:
             Blocking:               |               Blocked By:
Analyzed by developer:  0            |  Reproduced by developer:  0
-------------------------------------+-------------------------------------

Comment (by natt):

 Replying to [comment:3 cehoyos]:
 > If there is an issue, is is reproducible with this command:

 Yes, I get exactly that.
 {{{
 >ffmpeg -i lena.pnm -pix_fmt yuv420p -f crc - -vf format=bgr24
 -pix_fmt yuv420p -f crc -
 ffmpeg version N-37541-g670229e Copyright (c) 2000-2012 the FFmpeg
 developers
   built on Feb  3 2012 20:07:47 with gcc 4.6.2
   configuration: --enable-gpl --enable-version3 --disable-w32threads
 --enable-ru
 ntime-cpudetect --enable-avisynth --enable-bzlib --enable-frei0r --enable-
 libope
 ncore-amrnb --enable-libopencore-amrwb --enable-libfreetype --enable-
 libgsm --en
 able-libmp3lame --enable-libopenjpeg --enable-librtmp --enable-
 libschroedinger -
 -enable-libspeex --enable-libtheora --enable-libvo-aacenc --enable-libvo-
 amrwben
 c --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxavs
 --enable-
 libxvid --enable-zlib
   libavutil      51. 37.100 / 51. 37.100
   libavcodec     54.  0.102 / 54.  0.102
   libavformat    54.  0.100 / 54.  0.100
   libavdevice    53.  4.100 / 53.  4.100
   libavfilter     2. 61.100 /  2. 61.100
   libswscale      2.  1.100 /  2.  1.100
   libswresample   0.  6.100 /  0.  6.100
   libpostproc    52.  0.100 / 52.  0.100
 Input #0, image2, from 'lena.pnm':
   Duration: 00:00:00.04, start: 0.000000, bitrate: N/A
     Stream #0:0: Video: ppm, rgb24, 256x256, 25 tbr, 25 tbn, 25 tbc
 [buffer @ 003DA880] w:256 h:256 pixfmt:rgb24 tb:1/1000000 sar:0/1
 sws_param:
 [buffersink @ 01B9D2A0] auto-inserting filter 'auto-inserted scale 0'
 between th
 e filter 'src' and the filter 'out'
 [scale @ 01B9D680] w:256 h:256 fmt:rgb24 -> w:256 h:256 fmt:yuv420p
 flags:0x4
 [buffer @ 01B9DB20] w:256 h:256 pixfmt:rgb24 tb:1/1000000 sar:0/1
 sws_param:
 [buffersink @ 01C1CCA0] auto-inserting filter 'auto-inserted scale 1'
 between th
 e filter 'Parsed_format_0' and the filter 'out'
 [format @ 01C1BE40] auto-inserting filter 'auto-inserted scale 2' between
 the fi
 lter 'src' and the filter 'Parsed_format_0'
 [scale @ 01C1AAA0] w:256 h:256 fmt:rgb24 -> w:256 h:256 fmt:bgr24
 flags:0x4
 [scale @ 01C1BDE0] w:256 h:256 fmt:bgr24 -> w:256 h:256 fmt:yuv420p
 flags:0x4
 Output #0, crc, to 'pipe:':
   Metadata:
     encoder         : Lavf54.0.100
     Stream #0:0: Video: rawvideo (I420 / 0x30323449), yuv420p, 256x256,
 q=2-31,
 200 kb/s, 90k tbn, 25 tbc
 Output #1, crc, to 'pipe:':
   Metadata:
     encoder         : Lavf54.0.100
     Stream #1:0: Video: rawvideo (I420 / 0x30323449), yuv420p, 256x256,
 q=2-31,
 200 kb/s, 90k tbn, 25 tbc
 Stream mapping:
   Stream #0:0 -> #0:0 (ppm -> rawvideo)
   Stream #0:0 -> #1:0 (ppm -> rawvideo)
 Press [q] to stop, [?] for help
 CRC=0x7db3d981
 CRC=0x74eb2924
 frame=    1 fps=  0 q=0.0 Lq=0.0 size=       0kB time=00:00:00.04 bitrate=
 3.0
 kbits/s
 video:192kB audio:0kB global headers:0kB muxing overhead -99.992371%
 }}}

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/979#comment:4>
FFmpeg <http://ffmpeg.org>
FFmpeg issue tracker