[FFmpeg-trac] #1980(FFmpeg:new): ffmpeg process hangs with 100% CPU when getting a live rtsp stream (on redhat linux)

[FFmpeg]

#1980: ffmpeg process hangs with 100% CPU when getting a live rtsp stream (on
redhat linux)
---------------------------------------+----------------------------------
             Reporter:  muthuk         |                     Type:  defect
               Status:  new            |                 Priority:  normal
            Component:  FFmpeg         |                  Version:  1.0
             Keywords:  rtsp 100% cpu  |               Blocked By:
             Blocking:                 |  Reproduced by developer:  0
Analyzed by developer:  0              |
---------------------------------------+----------------------------------
 Summary of the bug:
 ffmpeg process hangs with 100% CPU when getting a live rtsp stream (on
 redhat linux). This happens when 25 or more such processes are
 concurrently invoked.
 How to reproduce:
 On redhat linux (2.6+) launch 25 or more parallel live rtsp stream reads.

 Command line is as follows,
 /home/lsadm/StressTest/FFmpeg/bin/ffmpeg -i rtsp://xstream-bcast-
 grinder003:50554/5EErJWzqY7hSRkrUL030_A_QVGA+email.share at yahoo.com-
 5EErJWzqY7hSRkrUL030_A_QVGA.sdp -timelimit 306 -minrate 70k -maxrate 1400k
 -map 0 -t 306 -c:v copy -c:a alac -y
 /home/lsadm/StressTest/Outputs/mediaOutput/RTSP_DownStreamer-
 97_5EErJWzqY7hSRkrUL030.mov

 The generated console (stats) data is,
 ffmpeg version 1.0 Copyright (c) 2000-2012 the FFmpeg developers
   built on Nov 12 2012 13:10:29 with gcc 4.1.2 (GCC) 20080704 (Red Hat
 4.1.2-44)
   configuration: --disable-yasm --enable-nonfree
 --prefix=/home/lsadm/StressTest/FFmpeg/
   libavutil      51. 73.101 / 51. 73.101
   libavcodec     54. 59.100 / 54. 59.100
   libavformat    54. 29.104 / 54. 29.104
   libavdevice    54.  2.101 / 54.  2.101
   libavfilter     3. 17.100 /  3. 17.100
   libswscale      2.  1.101 /  2.  1.101
   libswresample   0. 15.100 /  0. 15.100
 [h264 @ 0x17d6f540] Missing reference picture
 [h264 @ 0x17d6f540] decode_slice_header error
 [h264 @ 0x17d6f540] concealing 300 DC, 300 AC, 300 MV errors in P frame
 [h264 @ 0x17d6f540] Missing reference picture
 [h264 @ 0x17d6f540] RTP: missed 15429 packets
 [h264 @ 0x17d6f540] RTP: missed 15430 packets
 [h264 @ 0x17d6f540] RTP: missed 15431 packets
 [h264 @ 0x17d6f540] RTP: missed 15432 packets
 [h264 @ 0x17d6f540] RTP: missed 15433 packets



 Below is a snapshot of the CPU captured with top command,
 Tasks: 404 total,   2 running, 402 sleeping,   0 stopped,   0 zombie
 Cpu(s):  6.3%us,  0.1%sy,  0.0%ni, 93.4%id,  0.2%wa,  0.0%hi,  0.0%si,
 0.0%st
 Mem:   6096740k total,  5990044k used,   106696k free,    10404k buffers
 Swap:  1020116k total,   336084k used,   684032k free,  3099316k cached

   PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
 22478 lsadm     25   0 27364 4732 1920 R 99.9  0.1  18:35.66 ffmpeg
 16383 lsadm     15   0 2695m 2.3g 2624 S  0.7 40.4  32:52.16 perl
 26991 lsadm     15   0 29340 6272 2776 S  0.3  0.1   0:00.73 ffmpeg
 26994 lsadm     15   0 28192 4904 2416 S  0.3  0.1   0:00.78 ffmpeg
 27319 lsadm     15   0 10988 1280  772 R  0.3  0.0   0:00.07 top
     1 root      15   0 10344   80   48 S  0.0  0.0   3:56.92 init


 [lsadm at grinder025 Scripts]$ ps -aef | grep 22478
 lsadm    22478 22476 99 17:30 pts/1    00:28:54
 /home/lsadm/StressTest/FFmpeg/bin/ffmpeg -i rtsp://xstream-bcast-
 grinder003:50554/5EErJWzqY7hSRkrUL030_A_QVGA+email.share at yahoo.com-
 5EErJWzqY7hSRkrUL030_A_QVGA.sdp -timelimit 306 -minrate 70k -maxrate 1400k
 -map 0 -t 306 -c:v copy -c:a alac -y
 /home/lsadm/StressTest/Outputs/mediaOutput/RTSP_DownStreamer-
 97_5EErJWzqY7hSRkrUL030.mov
 lsadm    29402  2890  0 17:59 pts/3    00:00:00 grep 22478
 [lsadm at grinder025 Scripts]$ ps -aef | grep 22476
 lsadm    22476 16383  0 17:30 pts/1    00:00:00 sh -c
 /home/lsadm/StressTest/FFmpeg/bin/ffmpeg -i 'rtsp://xstream-bcast-
 grinder003:50554/5EErJWzqY7hSRkrUL030_A_QVGA+email.share at yahoo.com-
 5EErJWzqY7hSRkrUL030_A_QVGA.sdp' -timelimit 306 -minrate 70k -maxrate
 1400k -map 0 -t 306 -c:v copy -c:a alac -y
 /home/lsadm/StressTest/Outputs/mediaOutput/RTSP_DownStreamer-
 97_5EErJWzqY7hSRkrUL030.mov 2> /home/lsadm/StressTest/Outputs/openRTSPLog
 /RTSP_DownStreamer-97_5EErJWzqY7hSRkrUL030.log

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1980>
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