[FFmpeg-trac] #5777(avfilter:new): No support for coloured emoji with drawtext filter

[FFmpeg]

#5777: No support for coloured emoji with drawtext filter
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             Reporter:  Illya     |                     Type:  defect
               Status:  new       |                 Priority:  minor
            Component:  avfilter  |                  Version:  git-master
             Keywords:            |               Blocked By:
             Blocking:            |  Reproduced by developer:  0
Analyzed by developer:  0         |
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 Summary of the bug:
 Using the drawtext filter and a capable emoji font, the colour is changed
 by whatever the {{{ fontcolor }}} parameter is. The emoji should stay it's
 original colour (in this case, red), rather than being changed.

 How to reproduce:
 {{{
 % ffmpeg -t 100 -s 640x480 -f rawvideo -pix_fmt rgb24 -r 25 -i /dev/zero
 -vf drawtext="emojione.ttf: text='Nice 💯 !': fontcolor=white:
 fontsize=24: x=(w-text_w)/2: y=(h-text_h-line_h)/2" -codec:a copy
 output.mp4 -y
 ffmpeg version N-81321-g17eb004 Copyright (c) 2000-2016 the FFmpeg
 developers
   built with Apple LLVM version 7.3.0 (clang-703.0.31)
   configuration: --samples=fate --enable-libopenmpt --enable-libdc1394
 --enable-libfreetype --enable-fontconfig
   libavutil      55. 28.100 / 55. 28.100
   libavcodec     57. 51.100 / 57. 51.100
   libavformat    57. 46.100 / 57. 46.100
   libavdevice    57.  0.102 / 57.  0.102
   libavfilter     6. 51.100 /  6. 51.100
   libswscale      4.  1.100 /  4.  1.100
   libswresample   2.  1.100 /  2.  1.100
 Input #0, rawvideo, from '/dev/zero':
   Duration: N/A, start: 0.000000, bitrate: 184320 kb/s
     Stream #0:0: Video: rawvideo (RGB[24] / 0x18424752), rgb24, 640x480,
 184320 kb/s, 25 tbr, 25 tbn, 25 tbc
 [mp4 @ 0x7f9495800600] Using AVStream.codec to pass codec parameters to
 muxers is deprecated, use AVStream.codecpar instead.
 Output #0, mp4, to 'output.mp4':
   Metadata:
     encoder         : Lavf57.46.100
     Stream #0:0: Video: mpeg4 ( [0][0][0] / 0x0020), yuv420p, 640x480,
 q=2-31, 200 kb/s, 25 fps, 12800 tbn, 25 tbc
     Metadata:
       encoder         : Lavc57.51.100 mpeg4
     Side data:
       cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: -1
 Stream mapping:
   Stream #0:0 -> #0:0 (rawvideo (native) -> mpeg4 (native))
 Press [q] to stop, [?] for help
 frame= 2500 fps=545 q=2.0 Lsize=    1209kB time=00:01:39.96 bitrate=
 99.1kbits/s speed=21.8x
 video:1197kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB
 muxing overhead: 0.954954%
 }}}

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Ticket URL: <https://trac.ffmpeg.org/ticket/5777>
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