[FFmpeg-trac] #5636(avformat:new): Add user specified cache path to cache protocol

[FFmpeg]

#5636: Add user specified cache path to cache protocol
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             Reporter:  chinshou  |                     Type:  enhancement
               Status:  new       |                 Priority:  normal
            Component:  avformat  |                  Version:  git-master
             Keywords:            |               Blocked By:
             Blocking:            |  Reproduced by developer:  0
Analyzed by developer:  0         |
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 I create a patch that add a cache_path option to cache protocol.

 The reason for such option is that av_tempfile may fail on different
 android devices. (see https://trac.ffmpeg.org/ticket/5620).even with
 4c9d1c6f9a8f166703dc0333b53f5dba8dc5b414 fix , it still failed on my
 mobile phone.That may be due to some permission issues on different
 android devices. It is impossible to cover all the corner cases on
 different android devices.

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Ticket URL: <https://trac.ffmpeg.org/ticket/5636>
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