id summary reporter owner description type status priority component version resolution keywords cc blockedby blocking reproduced analyzed 1980 ffmpeg process hangs with 100% CPU when getting a live rtsp stream (on redhat linux) muthuk "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@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@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@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@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@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" defect closed normal undetermined 1.0 needs_more_info rtsp person79@… 0 0