[FFmpeg-trac] #5633(avfilter:new): Incorrect colours when padding for yuvj4xx

[FFmpeg]

#5633: Incorrect colours when padding for yuvj4xx
--------------------------------------+----------------------------------
               Reporter:  cehoyos     |                  Owner:
                   Type:  defect      |                 Status:  new
               Priority:  normal      |              Component:  avfilter
                Version:  git-master  |               Keywords:  pad
             Blocked By:              |               Blocking:
Reproduced by developer:  0           |  Analyzed by developer:  0
--------------------------------------+----------------------------------
 http://thread.gmane.org/gmane.comp.video.ffmpeg.user/62858
 The pad filter accepts yuvj4xx as input format but uses yuv4xx data and
 produces gray output.
 {{{
 $ ffmpeg -f lavfi -i color=s=4x4:color=white -vf
 format=yuvj420p,scale,pad=1920:1080:color=white -f rawvideo -vframes 1 out
 ffmpeg version N-80268-g9e9286e Copyright (c) 2000-2016 the FFmpeg
 developers
   built with gcc 4.7 (SUSE Linux)
   configuration: --enable-gpl
   libavutil      55. 24.100 / 55. 24.100
   libavcodec     57. 46.100 / 57. 46.100
   libavformat    57. 37.101 / 57. 37.101
   libavdevice    57.  0.101 / 57.  0.101
   libavfilter     6. 46.101 /  6. 46.101
   libswscale      4.  1.100 /  4.  1.100
   libswresample   2.  0.101 /  2.  0.101
   libpostproc    54.  0.100 / 54.  0.100
 Input #0, lavfi, from 'color=s=4x4:color=white':
   Duration: N/A, start: 0.000000, bitrate: N/A
     Stream #0:0: Video: rawvideo (I420 / 0x30323449), yuv420p, 4x4 [SAR
 1:1 DAR 1:1], 25 tbr, 25 tbn, 25 tbc
 [swscaler @ 0x37126c0] deprecated pixel format used, make sure you did set
 range correctly
 [rawvideo @ 0x3704e40] Using AVStream.codec to pass codec parameters to
 muxers is deprecated, use AVStream.codecpar instead.
 Output #0, rawvideo, to 'out':
   Metadata:
     encoder         : Lavf57.37.101
     Stream #0:0: Video: rawvideo (I420 / 0x30323449), yuvj420p, 1920x1080
 [SAR 1:1 DAR 16:9], q=2-31, 200 kb/s, 25 fps, 25 tbn, 25 tbc
     Metadata:
       encoder         : Lavc57.46.100 rawvideo
 Stream mapping:
   Stream #0:0 -> #0:0 (rawvideo (native) -> rawvideo (native))
 Press [q] to stop, [?] for help
 [swscaler @ 0x37126c0] Warning: data is not aligned! This can lead to a
 speedloss
 frame=    1 fps=0.0 q=-0.0 Lsize=    3038kB time=00:00:00.04
 bitrate=622080.0kbits/s speed=12.2x
 video:3038kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB
 muxing overhead: 0.000000%
 }}}
 {{{
 $ hexdump -C out
 00000000  ff ff ff ff eb eb eb eb  eb eb eb eb eb eb eb eb
 |................|
 00000010  eb eb eb eb eb eb eb eb  eb eb eb eb eb eb eb eb
 |................|
 *
 00000780  ff ff ff ff eb eb eb eb  eb eb eb eb eb eb eb eb
 |................|
 00000790  eb eb eb eb eb eb eb eb  eb eb eb eb eb eb eb eb
 |................|
 *
 00000f00  ff ff ff ff eb eb eb eb  eb eb eb eb eb eb eb eb
 |................|
 00000f10  eb eb eb eb eb eb eb eb  eb eb eb eb eb eb eb eb
 |................|
 *
 00001680  ff ff ff ff eb eb eb eb  eb eb eb eb eb eb eb eb
 |................|
 00001690  eb eb eb eb eb eb eb eb  eb eb eb eb eb eb eb eb
 |................|
 *
 001fa400  80 80 80 80 80 80 80 80  80 80 80 80 80 80 80 80
 |................|
 *
 002f7600
 }}}

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Ticket URL: <https://trac.ffmpeg.org/ticket/5633>
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