[FFmpeg-trac] #11571(undetermined:new): Unexpected shell variable overwrite with `read` and `ffmpeg`

[FFmpeg]

#11571: Unexpected shell variable overwrite with `read` and `ffmpeg`
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             Reporter:  Jimmy Leung  |                    Owner:  (none)
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:
                                     |  undetermined
              Version:  7.1          |               Resolution:
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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Comment (by Jimmy Leung):

 Maybe...(?)

 My other script has a loop like this, and the read buffer actually get
 piped to several utilities (sed, grep, curl, etc), and the missing
 character issue can only be found at the line I call `ffmpeg`.

 I still suspect it is `ffmpeg` handing, but anyway I get my workaround. If
 project maintainer think this error is irrelevant to `ffmpeg` itself, feel
 free to close this ticket :)
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Ticket URL: <https://trac.ffmpeg.org/ticket/11571#comment:2>
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