[FFmpeg-trac] #1235(avformat:new): ffio_limit does not work correctly with named pipes on OSX (Snow Leopard)

[FFmpeg]

#1235: ffio_limit does not work correctly with named pipes on OSX (Snow Leopard)
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             Reporter:  ls          |                    Owner:
                 Type:  defect      |                   Status:  new
             Priority:  normal      |                Component:  avformat
              Version:  git-master  |               Resolution:
             Keywords:              |               Blocked By:
             Blocking:              |  Reproduced by developer:  0
Analyzed by developer:  0           |
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Comment (by ls):

 On OSX in ffio_limit `s->seekable` is 0 when process substitution is used
 (ffmpeg reads from /dev/fd/xx) while on Linux `s->seekable` is 1.
 Furthermore `s->maxsize` is always 16384 on OSX. I do not understand if
 avio_size is supposed to work for non seekable streams. Currently I have
 applied this:
 {{{
 diff --git a/libavformat/utils.c b/libavformat/utils.c
 index 1bf5ac5..a066cd7 100644
 --- a/libavformat/utils.c
 +++ b/libavformat/utils.c
 @@ -276,7 +276,7 @@ AVInputFormat *av_find_input_format(const char
 *short_name)

  int ffio_limit(AVIOContext *s, int size)
  {
 -    if(s->maxsize>=0){
 +    if(s->maxsize>=0 && s->seekable){
          int64_t remaining= s->maxsize - avio_tell(s);
          if(remaining < size){
              int64_t newsize= avio_size(s);
 }}}

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Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1235#comment:1>
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