Crash in the motion estimation with merange=128

ffmpeg_g -y -r 50 -start_number 07111 -i /Video/SGI/vqeg.its.bldrdoc.gov/HDTV/SVT_MultiFormat/2160p50_CgrLevels_Master_SVTdec05_/1_CrowdRun_2160p50_CgrLevels_MASTER_SVTdec05_/%05d.sgi -c:v libx265 -x265-params me=2:**merange=128**:b-adapt=2:bframes=4:bitrate=16000 -s 1920x1080 ~/Video/HEVC/1_CrowdRun_1080p50_CgrLevels_MASTER_SVTdec05.hevc

ffmpeg version N-61460-g33fb2ba Copyright (c) 2000-2014 the FFmpeg developers
  built on Mar 14 2014 17:55:44 with gcc 4.8.2 (GCC) 20140120 (Red Hat 4.8.2-14)
  configuration: --enable-libx264 --enable-libx265 --enable-libdc1394 --enable-libvorbis --enable-libtheora --disable-static --enable-shared --enable-pic --enable-gpl --enable-version3 --enable-nonfree --prefix=/usr --libdir=/usr/lib64 --shlibdir=/usr/lib64 --samples=/usr/src/FFmpeg/tests/ref/fate --enable-debug --disable-doc
  libavutil      52. 66.101 / 52. 66.101
  libavcodec     55. 52.102 / 55. 52.102
  libavformat    55. 34.101 / 55. 34.101
  libavdevice    55. 11.100 / 55. 11.100
  libavfilter     4.  3.100 /  4.  3.100
  libswscale      2.  5.101 /  2.  5.101
  libswresample   0. 18.100 /  0. 18.100
  libpostproc    52.  3.100 / 52.  3.100
Input #0, image2, from '/Video/SGI/vqeg.its.bldrdoc.gov/HDTV/SVT_MultiFormat/2160p50_CgrLevels_Master_SVTdec05_/1_CrowdRun_2160p50_CgrLevels_MASTER_SVTdec05_/%05d.sgi':
  Duration: 00:00:19.64, start: 0.000000, bitrate: N/A
    Stream #0:0: Video: sgi, rgb48be, 3840x2160 [SAR 1:1 DAR 16:9], 25 tbr, 25 tbn, 25 tbc
[New Thread 0x7fffed894700 (LWP 3876)]
[New Thread 0x7fffed093700 (LWP 3877)]
[New Thread 0x7fffec892700 (LWP 3878)]
x265 [info]: using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.1 Cache64
x265 [info]: Main profile, Level-4.1 (Main tier)
[New Thread 0x7fffec091700 (LWP 3879)]
[New Thread 0x7fffeb890700 (LWP 3880)]
x265 [info]: WPP streams / pool / frames         : 17 / 2 / 1
x265 [info]: CU size                             : 64
x265 [info]: Max RQT depth inter / intra         : 1 / 1
x265 [info]: ME / range / subpel / merge         : umh / 128 / 2 / 2
x265 [info]: Keyframe min / max / scenecut       : 25 / 250 / 40
x265 [info]: Lookahead / bframes / badapt        : 20 / 4 / 2
x265 [info]: b-pyramid / weightp / refs          : 1 / 1 / 3
x265 [info]: Rate Control / AQ-Strength / CUTree : ABR-16000 kbps / 1.0 / 1
x265 [info]: tools: rect amp rd=3 lft sao-lcu sign-hide 
[New Thread 0x7fffe9a13700 (LWP 3881)]
Output #0, hevc, to '/home/peter.kovar/Video/HEVC/1_CrowdRun_1080p50_CgrLevels_MASTER_SVTdec05.hevc':
  Metadata:
    encoder         : Lavf55.34.101
    Stream #0:0: Video: hevc (libx265), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 200 kb/s, 90k tbn, 50 tbc
Stream mapping:
  Stream #0:0 -> #0:0 (sgi -> libx265)
Press [q] to stop, [?] for help
**frame=  209** fps=0.3 q=0.0 size=    7450kB time=00:00:03.74 bitrate=16317.4kbits/s    
Program received signal SIGSEGV, Segmentation fault.

Dump of assembler code for function x265_pixel_sad_8x4_mmx2:
   0x00007ffff35d97f0 <+0>:     pxor   %mm0,%mm0
   0x00007ffff35d97f3 <+3>:     movq   (%rdi),%mm1
   0x00007ffff35d97f6 <+6>:     movq   (%rdi,%rsi,1),%mm2
=> 0x00007ffff35d97fa <+10>:    psadbw (%rdx),%mm1
   0x00007ffff35d97fd <+13>:    psadbw (%rdx,%rcx,1),%mm2
   0x00007ffff35d9801 <+17>:    lea    (%rdi,%rsi,2),%rdi
Attached is the backtrace.
This happens with the motion estimation range equal to 128. Without this parameter encoder runs whole sequence without any faults.
Question: how could I better describe this bug?
Comments (4)
