[FFmpeg-trac] #4126(ffmpeg:open): FFMPEG is very slow when trying to use a http url as source

[FFmpeg]

#4126: FFMPEG is very slow when trying to use a http url as source
------------------------------------+----------------------------------
             Reporter:  srikanth    |                    Owner:
                 Type:  defect      |                   Status:  open
             Priority:  important   |                Component:  ffmpeg
              Version:  git-master  |               Resolution:
             Keywords:  http        |               Blocked By:
             Blocking:              |  Reproduced by developer:  1
Analyzed by developer:  0           |
------------------------------------+----------------------------------
Changes (by cehoyos):

 * status:  reopened => open


Comment:

 The command (often) works without {{{-vn}}}
 {{{
 $ ffmpeg -i http://samples.ffmpeg.org/MPEG-4/video.mp4 -f null -vn -
 ffmpeg version N-72747-ga4557b7 Copyright (c) 2000-2015 the FFmpeg
 developers
   built with gcc 4.7 (SUSE Linux)
   configuration: --enable-gpl
   libavutil      54. 27.100 / 54. 27.100
   libavcodec     56. 41.100 / 56. 41.100
   libavformat    56. 36.100 / 56. 36.100
   libavdevice    56.  4.100 / 56.  4.100
   libavfilter     5. 16.101 /  5. 16.101
   libswscale      3.  1.101 /  3.  1.101
   libswresample   1.  2.100 /  1.  2.100
   libpostproc    53.  3.100 / 53.  3.100
 Input #0, mov,mp4,m4a,3gp,3g2,mj2, from
 'http://samples.ffmpeg.org/MPEG-4/video.mp4':
   Metadata:
     major_brand     : isom
     minor_version   : 0
     compatible_brands: mp41
     creation_time   : 2008-12-15 20:31:58
   Duration: 00:02:47.23, start: 0.000000, bitrate: 1333 kb/s
     Stream #0:0(eng): Video: mpeg4 (Simple Profile) (mp4v / 0x7634706D),
 yuv420p, 320x240 [SAR 1:1 DAR 4:3], 1191 kb/s, 29.97 fps, 29.97 tbr, 90k
 tbn, 29.97 tbc (default)
     Metadata:
       creation_time   : 2008-12-15 20:31:58
     Stream #0:1(eng): Data: none (rtp  / 0x20707472), 27 kb/s
     Metadata:
       creation_time   : 2008-12-15 20:32:08
     Stream #0:2(eng): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz,
 stereo, fltp, 97 kb/s (default)
     Metadata:
       creation_time   : 2008-12-15 20:32:10
     Stream #0:3(eng): Data: none (rtp  / 0x20707472), 13 kb/s
     Metadata:
       creation_time   : 2008-12-15 20:32:10
     Stream #0:4(eng): Data: none (mp4s / 0x7334706D), 0 kb/s (default)
     Metadata:
       creation_time   : 2008-12-15 20:32:11
     Stream #0:5(eng): Data: none (mp4s / 0x7334706D) (default)
     Metadata:
       creation_time   : 2008-12-15 20:32:11
 Output #0, null, to 'pipe:':
   Metadata:
     major_brand     : isom
     minor_version   : 0
     compatible_brands: mp41
     encoder         : Lavf56.36.100
     Stream #0:0(eng): Audio: pcm_s16le, 44100 Hz, stereo, s16, 1411 kb/s
 (default)
     Metadata:
       creation_time   : 2008-12-15 20:32:10
       encoder         : Lavc56.41.100 pcm_s16le
 Stream mapping:
   Stream #0:2 -> #0:0 (aac (native) -> pcm_s16le (native))
 Press [q] to stop, [?] for help
 [mov,mp4,m4a,3gp,3g2,mj2 @ 0x1e781c0] stream 2, offset 0x32a42c: partial
 file
 http://samples.ffmpeg.org/MPEG-4/video.mp4: Invalid data found when
 processing input
 size=N/A time=00:00:19.41 bitrate=N/A
 video:0kB audio:3344kB subtitle:0kB other streams:0kB global headers:0kB
 muxing overhead: unknown
 }}}

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Ticket URL: <https://trac.ffmpeg.org/ticket/4126#comment:6>
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