[FFmpeg-trac] #2855(undetermined:new): Multiple ffmpeg instances are not independent

[FFmpeg]

#2855: Multiple ffmpeg instances are not independent
-------------------------------------+-------------------------------------
             Reporter:  samsonradu   |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:
  undetermined                       |  unspecified
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 I'm using ffmpeg to capture jpeg images from an rtmp stream. Here is the
 commands I use in 2 Ubuntu 12.04 terminals:

     /usr/local/bin/ffmpeg -threads 4 -i rtmp://..../chat/mp4:100000.mp4
     -q:v 0.6 -r 15 -s 320x240 /frames/10021237_data/frame-%0999d.jpg

     /usr/local/bin/ffmpeg -threads 4 -i rtmp://..../chat/mp4:100001.mp4
     -q:v 0.6 -r 15 -s 320x240 /frames/10021237_data/frame-%0999d.jpg

 I get this output from both:

     ffmpeg version N-55388-g9386f33 Copyright (c) 2000-2013 the FFmpeg
 developers
       built on Aug  8 2013 14:07:38 with gcc 4.7 (Ubuntu/Linaro
 4.7.2-2ubuntu1)
       configuration:
       libavutil      52. 41.100 / 52. 41.100
       libavcodec     55. 24.100 / 55. 24.100
       libavformat    55. 13.102 / 55. 13.102
       libavdevice    55.  3.100 / 55.  3.100
       libavfilter     3. 82.100 /  3. 82.100
       libswscale      2.  4.100 /  2.  4.100
       libswresample   0. 17.103 /  0. 17.103
     Input #0, flv, from 'rtmp://......./mp4:10021237.mp4':
       Duration: N/A, start: 0.000000, bitrate: N/A
         Stream #0:0: Video: h264 (Main), yuv420p, 640x480 [SAR 1:1 DAR
 4:3], 1.92 tbr, 1k tbn, 40 tbc
         Stream #0:1: Audio: nellymoser, 44100 Hz, mono, flt
     [swscaler @ 0x1910000] deprecated pixel format used, make sure you did
 set range correctly
     Output #0, image2, to '/frames/10021237_data/frame-%0999d.jpg':
       Metadata:
         encoder         : Lavf55.13.102
         Stream #0:0: Video: mjpeg, yuvj420p, 320x240 [SAR 1:1 DAR 4:3],
 q=2-31, 200 kb/s, 90k tbn, 15 tbc
     Stream mapping:
       Stream #0:0 -> #0:0 (h264 -> mjpeg)
     Press [q] to stop, [?] for help


 However after I stop one of the instances I get this line on the other
 (before the process cleanly exits):

     video:5264kB audio:0kB subtitle:0 global headers:0kB muxing overhead
 -100.000408%

 So when one stops streaming all the ffmpeg processes end. Is there a way
 to make them independent?

 How can I make 2 ffmpeg instances independent so as killing one does not
 kill the other. Is this behaviour expected?

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2855>
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