[FFmpeg-trac] #5288(ffmpeg:new): FFmpeg -progress url Isn't working

[FFmpeg]

#5288: FFmpeg -progress url Isn't working
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             Reporter:  BlackDream  |                    Owner:
                 Type:  defect      |                   Status:  new
             Priority:  normal      |                Component:  ffmpeg
              Version:  git-master  |               Resolution:
             Keywords:              |               Blocked By:
             Blocking:              |  Reproduced by developer:  1
Analyzed by developer:  1           |
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Changes (by c-14):

 * analyzed:  0 => 1
 * reproduced:  0 => 1


Comment:

 The "problem" as such is that ffmpeg uses a single continuous chunked post
 to post the progress information to the server and the HTTP server sees
 this as a single request and therefore only processes it once when the
 request finishes.

 The only way to "fix" this (besides not using http) would be to create a
 new http muxer that creates a new post request every time ffurl_write is
 called on it (and then force that muxer for use with progress), or close
 and reopen the AVIOContext when writing progress information (hacky, but
 works). Neither of those options seems particularly clean though.

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Ticket URL: <https://trac.ffmpeg.org/ticket/5288#comment:7>
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