[FFmpeg-trac] #8000(ffmpeg:new): cache protocol unable to create temp files on windows 10

[FFmpeg]

#8000: cache protocol unable to create temp files on windows 10
-------------------------------------+-------------------------------------
             Reporter:               |                     Type:  defect
  andrewkpearce                      |
               Status:  new          |                 Priority:  important
            Component:  ffmpeg       |                  Version:
                                     |  unspecified
             Keywords:  Windows 10   |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Summary of the bug: when adding cache: in front of the URI, ffmpeg reports
 "failed to create tempfile".

 How to reproduce:

 Call avformat_open_input with cache: in front of the media URI


    73 static int cache_open(URLContext *h, const char *arg, int flags,
 AVDictionary **options)
    74 {
    75     char *buffername;
    76     Context *c= h->priv_data;
    77
    78     av_strstart(arg, "cache:", &arg);
    79
    80     c->fd = avpriv_tempfile("ffcache", &buffername, 0, h);
    81     if (c->fd < 0){
    82         av_log(h, AV_LOG_ERROR, "Failed to create tempfile\n");
    83         return c->fd;
    84     }
    85
    86     unlink(buffername);
    87     av_freep(&buffername);
    88
    89     return ffurl_open_whitelist(&c->inner, arg, flags,
 &h->interrupt_callback,
    90                                 options, h->protocol_whitelist,
 h->protocol_blacklist, h);
    91 }

 FFmpeg output is:

 FFmpeg (Error): [cache @ 0000021577e3d5c0] [TEMPFILE @ 00000092687fdd70]
 ff_tempfile: Cannot open temporary file ./ffcache1Apgjk

 FFmpeg (Error): [cache @ 0000021577e3d700] [TEMPFILE @ 00000092660fe2e0]
 ff_tempfile: Cannot open temporary file ./ffcacheBoLLC0

 FFmpeg (Error): [cache @ 0000021577e3d700] Failed to create tempfile

 FFmpeg (Error): [cache @ 0000021577e3d5c0] Failed to create tempfile

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Ticket URL: <https://trac.ffmpeg.org/ticket/8000>
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