[FFmpeg-trac] #4099(avcodec:closed): Regression in mpeg12dec? coded_width/height are left uninitialized

[FFmpeg]

#4099: Regression in mpeg12dec? coded_width/height are left uninitialized
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             Reporter:  Underground78  |                    Owner:
                 Type:  defect         |                   Status:  closed
             Priority:  normal         |                Component:  avcodec
              Version:  git-master     |               Resolution:  invalid
             Keywords:                 |               Blocked By:
             Blocking:                 |  Reproduced by developer:  0
Analyzed by developer:  0              |
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Changes (by michael):

 * status:  new => closed
 * resolution:   => invalid


Comment:

 in mpeg1/2 the width/height is stored with the keyframes
 as soon as one is decoded you have the correct value. Before one is
 decoded the value is not always known. The code could leave your value but
 you could then just find that with the first frame that the actual width /
 height is different.
 The 0,0 shows clearly that the value isnt know yet, leaving them
 initialized to what the user set but then chaging them on the first frame
 seems more confusing to me

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Ticket URL: <https://trac.ffmpeg.org/ticket/4099#comment:3>
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