[FFmpeg-trac] #7395(avformat:new): DASH demuxing error "unterminated entity reference" due to ampersand in URL

[FFmpeg]

#7395: DASH demuxing error "unterminated entity reference" due to ampersand in URL
-------------------------------------+-------------------------------------
             Reporter:  Starchild    |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:  avformat     |                  Version:  git-
             Keywords:  dash,        |  master
  dashdec                            |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Commit 7a63da8 broke the DASH demuxer if the manifest contains a BaseURL
 with an ampersand (&) or other characters that need to be escaped in
 XML.

 This is because the method resolve_content_path calls xmlNodeGetContent,
 which unescapes the string, and then passes it back to xmlNodeSetContent,
 which apparently expects an escaped string.

 Unfortunately I cannot provide an example MPD, but it should be easy
 enough to manufacture one by simply adding &v=3 or so to the BaseURL
 in a simple manifest.

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Ticket URL: <https://trac.ffmpeg.org/ticket/7395>
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