[FFmpeg-trac] #5690(undetermined:new): Codec hevc_nvenc (GPU M4000) + HLS memory leak

[FFmpeg]

#5690: Codec hevc_nvenc (GPU M4000) + HLS memory leak
-------------------------------------+-------------------------------------
             Reporter:  milanc       |                     Type:  defect
               Status:  new          |                 Priority:  important
            Component:               |                  Version:  git-
  undetermined                       |  master
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Summary of the bug:
 driver: nvidia-358, CUDA 7.5, NVAPI 3.6

 Hi, I have problem with hevc_nvenc encoding from DVB-S source into HLS.
 More encoding instances (channels) means faster loss of memory.
 For example 8xFullHD streams corresponds to loss 5MB/s of RAM.

 I try to use valgrind and I see that some cuda 352 libraries are used.
 The cuda7.5 package is depended on 352 driver (?) and I can't change it.

 {{{
 ==5808== 341,531 bytes in 109 blocks are possibly lost in loss record
 1,631 of 1,655
 ==5808==    at 0x4C2AB80: malloc (in /usr/lib/valgrind/vgpreload_memcheck-
 amd64-linux.so)
 ==5808==    by 0x1DB5CF1D: ??? (in /usr/lib/x86_64-linux-
 gnu/libcuda.so.352.79)
 ==5808==    by 0x1DB0D34C: ??? (in /usr/lib/x86_64-linux-
 gnu/libcuda.so.352.79)
 ==5808==    by 0x1DB1E11F: ??? (in /usr/lib/x86_64-linux-
 gnu/libcuda.so.352.79)
 ==5808==    by 0x1DB24D25: ??? (in /usr/lib/x86_64-linux-
 gnu/libcuda.so.352.79)
 ==5808==    by 0x1DA9EC19: ??? (in /usr/lib/x86_64-linux-
 gnu/libcuda.so.352.79)
 ==5808==    by 0x1DA9EECB: ??? (in /usr/lib/x86_64-linux-
 gnu/libcuda.so.352.79)
 ==5808==    by 0x1DA82352: ??? (in /usr/lib/x86_64-linux-
 gnu/libcuda.so.352.79)
 ==5808==    by 0x1DA50350: cuCtxCreate_v2 (in /usr/lib/x86_64-linux-
 gnu/libcuda.so.352.79)
 ==5808==    by 0x472136: ??? (in /usr/local/bin/ffmpeg)
 ==5808==    by 0xAF686D: ??? (in /usr/local/bin/ffmpeg)
 ==5808==    by 0x4A1562: ??? (in /usr/local/bin/ffmpeg)
 ==5808==
 ==5808== LEAK SUMMARY:
 ==5808==    definitely lost: 72 bytes in 1 blocks
 ==5808==    indirectly lost: 0 bytes in 0 blocks
 ==5808==      possibly lost: 999,476 bytes in 1,104 blocks
 ==5808==    still reachable: 1,883,507,503 bytes in 11,898 blocks
 ==5808==         suppressed: 0 bytes in 0 blocks
 ==5808== Reachable blocks (those to which a pointer was found) are not
 shown.
 ==5808== To see them, rerun with: --leak-check=full --show-leak-kinds=all
 ==5808==
 ==5808== For counts of detected and suppressed errors, rerun with: -v
 ==5808== Use --track-origins=yes to see where uninitialised values come
 from
 ==5808== ERROR SUMMARY: 557 errors from 172 contexts (suppressed: 0 from
 0)
 }}}


 {{{
 ffmpeg version N-80900-g77eb05a Copyright (c) 2000-2016 the FFmpeg
 developers
   built with gcc 4.8 (Ubuntu 4.8.4-2ubuntu1~14.04.3)
   configuration: --prefix=/FFMPEG --pkg-config-flags=--static
 --bindir=/root/bin --enable-gpl --enable-nonfree --enable-libfdk-aac
 --enable-libmp3lame --enable-libx264 --enable-libx265 --enable-nvenc
 --enable-libmfx --enable-version3 --enable-pthreads --enable-runtime-
 cpudetect --disable-ffserver --enable-libfreetype --enable-filter=drawtext
   libavutil      55. 28.100 / 55. 28.100
   libavcodec     57. 48.101 / 57. 48.101
   libavformat    57. 41.100 / 57. 41.100
   libavdevice    57.  0.102 / 57.  0.102
   libavfilter     6. 47.100 /  6. 47.100
   libswscale      4.  1.100 /  4.  1.100
   libswresample   2.  1.100 /  2.  1.100
   libpostproc    54.  0.100 / 54.  0.100
 Hyper fast Audio and Video encoder
 }}}

 My command...

 {{{
 ffmpeg -i "udp://@SOURCE_IP?fifo_size=1000000&overrun_nonfatal=1" -flags
 -global_header -map v:0 -c:v hevc_nvenc -b:v 3000k -maxrate 4000k -bufsize
 3000k -deinterlace -vf crop=in_w-0:in_h-0,scale=1920:1080,null -keyint_min
 30 -g 100 -map a:0 -c:a libfdk_aac -b:a 128k -ar 44100 -ac 2 -hls_time 5
 -hls_list_size 6 -hls_base_url http://A.B.C.D/101/ -hls_flags
 delete_segments -hls_segment_filename /hls/101/mystream-%08d.ts
 /hls/101/mystream.m3u8
 }}}

--
Ticket URL: <https://trac.ffmpeg.org/ticket/5690>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker