[FFmpeg-trac] #1073(avcodec:new): jpeg yuv444 input to yuv420 output

[FFmpeg]

#1073: jpeg yuv444 input to yuv420 output
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             Reporter:  kaijun61  |                     Type:  defect
               Status:  new       |                 Priority:  normal
            Component:  avcodec   |                  Version:  unspecified
             Keywords:  jpeg      |               Blocked By:
             Blocking:            |  Reproduced by developer:  0
Analyzed by developer:  0         |
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 When I input a yuv444 jpeg, but I got yuv420 output, I checked output size
 is 1.5 x width x height. I try ffplay in PC, it shows

 Input #0, image2, from '/home/tang/Pictures/15.jpg':
   Duration: 00:00:00.04, start: 0.000000, bitrate: N/A
     Stream #0.0: Video: mjpeg, yuvj444p, 854x480 [PAR 72:72 DAR 427:240],
 25 tbr, 25 tbn, 25 tbc
 [buffersink @ 0x7f4ddc001020] auto-inserting filter 'auto-inserted scaler
 0' between the filter 'src' and the filter 'out'
 [scale @ 0x7f4ddc0016e0] w:854 h:480 fmt:yuvj444p -> w:854 h:480
 fmt:yuv420p flags:0x4
    4.64 A-V:  0.000 s:0.0 aq=    0KB vq=    0KB sq=    0B f=0/0   0/0

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Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1073>
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