尝试将两个视频与pHash库及其ruby绑定进行比较时出现Segmentation Fault错误

我已经用最新的ffmpeg和pHash库(ffmpeg-2.2.1和pHash-0.9.6(以及pHash-ruby-gem设置了我的系统(https://github.com/toy/pHash)。

我正在使用ruby并尝试比较两个视频文件，如下所示：

require 'phash/video'
video1 = Phash::Video.new('video1.mp4')
video2 = Phash::Video.new('video2.mp4')
video1 % video2

执行此脚本会导致分段故障：

..../gems/pHash-1.1.4/lib/phash/video.rb:20: [BUG] Segmentation fault
ruby 1.9.3p545 (2014-02-24 revision 45159) [x86_64-darwin13.1.0]
-- Control frame information -----------------------------------------------
c:0008 p:---- s:0029 b:0029 l:000028 d:000028 CFUNC  :ph_dct_videohash
c:0007 p:0042 s:0024 b:0024 l:000023 d:000023 METHOD .../gems/pHash-1.1.4/lib/phash/video.rb:20
c:0006 p:0038 s:0017 b:0017 l:000016 d:000016 METHOD .../gems/pHash-1.1.4/lib/phash.rb:43
c:0005 p:0025 s:0014 b:0014 l:000013 d:000013 METHOD .../gems/pHash-1.1.4/lib/phash.rb:39
c:0004 p:0011 s:0011 b:0011 l:000010 d:000010 METHOD .../gems/pHash-1.1.4/lib/phash.rb:48
c:0003 p:0050 s:0006 b:0006 l:000128 d:0011b8 EVAL   video_test_phash.rb:3
c:0002 p:---- s:0004 b:0004 l:000003 d:000003 FINISH
c:0001 p:0000 s:0002 b:0002 l:000128 d:000128 TOP   
-- Ruby level backtrace information ----------------------------------------
video_test_phash.rb:3:in `<main>'
.../gems/pHash-1.1.4/lib/phash.rb:48:in `similarity'
.../gems/pHash-1.1.4/lib/phash.rb:39:in `phash'
.../gems/pHash-1.1.4/lib/phash.rb:43:in `compute_phash'
.../gems/pHash-1.1.4/lib/phash/video.rb:20:in `video_hash'
.../gems/pHash-1.1.4/lib/phash/video.rb:20:in `ph_dct_videohash'
...
Abort trap: 6

崩溃似乎发生在ph_dct_videohash函数中，该函数是pHash库的一部分。这个函数在文件pHash.cpp中。我把它复制到这里，以防它对某人有意义：

ulong64* ph_dct_videohash(const char *filename, int &Length){
    CImgList<uint8_t> *keyframes = ph_getKeyFramesFromVideo(filename);
    if (keyframes == NULL)
    return NULL;
    Length = keyframes->size();
    ulong64 *hash = (ulong64*)malloc(sizeof(ulong64)*Length);
    CImg<float> *C = ph_dct_matrix(32);
    CImg<float> Ctransp = C->get_transpose();
    CImg<float> dctImage;
    CImg<float> subsec;
    CImg<uint8_t> currentframe;
    for (unsigned int i=0;i < keyframes->size(); i++){
    currentframe = keyframes->at(i);
    currentframe.blur(1.0);
    dctImage = (*C)*(currentframe)*Ctransp;
    subsec = dctImage.crop(1,1,8,8).unroll('x');
    float med = subsec.median();
    hash[i] =     0x0000000000000000;
    ulong64 one = 0x0000000000000001;
    for (int j=0;j<64;j++){
        if (subsec(j) > med)
        hash[i] |= one;
        one = one << 1;
    }
    }
    keyframes->clear();
    delete keyframes;
    keyframes = NULL;
    delete C;
    C = NULL;
    return hash;
}

非常感谢您的帮助！