如何在 MacOSX Lion 上构建 pHash(使用最新的 ffmpeg-devel) [英] How to build pHash on MacOSX Lion (using latest ffmpeg-devel)

问题描述

在 OSX 上构建 pHash 0.9.4 可能会很棘手.对于那些遇到问题的人，我下面有点冗长的回答可能会有所帮助.

Building pHash 0.9.4 on OSX can turn out to be tricky. For those of you who've run into issues, my somewhat lengthy answer below might help.

推荐答案

确保您的 macports 已完全更新并正常工作.这意味着最近的 Xcode，在 Xcode 首选项->下载->组件中安装命令行工具！

Make sure you've got macports fully updated and working. This means a recent Xcode, and inside Xcode preferences->downloads->components install Command-Line Tools !

$ sudo port selfupdate

# if you've had previous build issues:
$ sudo port clean --all

# get pHash
wget http://www.phash.org/releases/pHash-0.9.4.tar.gz
tar zxvf pHash-0.9.4.tar.gz
cd pHash-0.9.4

# remove old versions of ffmpeg, e.g.
$ sudo port installed ffmpeg
$ sudo port uninstall --follow-dependents ffmpeg @0.7.11_1+mmx
$ sudo port uninstall --follow-dependents ffmpeg @0.7.8_0

# install latest ffmpeg-devel version (@20120329 for me) - enable the non-free stuff as well
$ sudo port install ffmpeg-devel +nonfree

# double check that you have some new header files
$ ll -tr /opt/local/include/

total 8816
-rw-r--r--    1 root  admin      191 Dec 23  2004 lua.hpp
-rw-r--r--    1 root  admin     1026 Dec 27  2007 lualib.h
-rw-r--r--    1 root  admin     5777 Dec 27  2007 lauxlib.h
...

drwxr-xr-x    6 root  admin      204 Jul 12 17:27 libmodplug
drwxr-xr-x    3 root  admin      102 Jul 12 17:32 libswscale
drwxr-xr-x    3 root  admin      102 Jul 12 17:32 libswresample
drwxr-xr-x    3 root  admin      102 Jul 12 17:32 libpostproc
drwxr-xr-x   41 root  admin     1394 Jul 12 17:32 libavutil
drwxr-xr-x    5 root  admin      170 Jul 12 17:32 libavformat
drwxr-xr-x    8 root  admin      272 Jul 12 17:32 libavfilter
drwxr-xr-x    3 root  admin      102 Jul 12 17:32 libavdevice
drwxr-xr-x   10 root  admin      340 Jul 12 17:32 libavcodec

# get CImg and copy CImg.h into your pHash dir
$ cd ..
$ wget http://downloads.sourceforge.net/project/cimg/CImg-1.5.0.zip
$ unzip CImg-1.5.0.zip
$ cp CImg-1.5.0/CImg.h pHash-0.9.4/
$ cd pHash-0.9.4

# copy the JNI headers from your Java SDK into your pHash dir - for 1.7.0 they're here:
$ cp /Library/Java//JavaVirtualMachines/1.7.0.jdk/Contents/Home/include/jni.h ./
$ cp /Library/Java//JavaVirtualMachines/1.7.0.jdk/Contents/Home/include/darwin/jni_md.h ./

# install libsndfile, libsamplerate and mpg123 if not installed already
$ sudo port install libsndfile
$ sudo port install libsamplerate
$ sudo port install mpg123

# now run configure, with Java enabled as you likely want those cool bindings, and expect the missing libavcodec error:
$ ./configure --enable-java 

或者这更有意义:

OR this which would make more sense:

$ ./configure --enable-java CPPFLAGS="-I/opt/local/include" LDFLAGS="-L/opt/local/lib" 

但是 configure 完全忽略了新的包含/lib 路径:( 似乎因为它们是硬编码在 configure 中的.

but configure completely ignores the new include/lib paths stated :( Seemingly as they're hardcoded inside configure.

...
checking CImg.h usability... no
checking CImg.h presence... no
checking for CImg.h... no
checking whether CImg.h is in the current or src directory.... yes

*** Configuring video Hash ***

checking whether FFmpeg is present... checking for avcodec_alloc_frame in -lavcodec... no
configure: error: 

*** libavcodec not found.

那么既然 configure 期望所有的库和包含在/usr/local/(不是/opt/local)中，我不能让它在别处寻找，唯一要做的就是暴力破解它！:D

So then since configure expects all the libs and includes to be in /usr/local/ (not /opt/local) and I cant't get it to look elsewhere, the only thing left to do is brute-force it ! :D

# edit ./configure as follows
$ nano configure
CTRL-W -> search for ' -L/' (note the space)

# edit the lines as follows
LDFLAGS="$LDFLAGS -L/usr/local/lib -L/opt/local/lib"
CPPFLAGS="$CPPFLAGS -I/usr/local/include -I/opt/local/include"  

# Or do the newbie version (I actually did this the first time!)
$ sudo mv /usr/local/lib /usr/local/lib-foo
$ sudo mv /usr/local/include/ /usr/local/include-foo
$ sudo ln -s /opt/local/lib /usr/local/lib
$ sudo ln -s /opt/local/include /usr/local/include

$ ll /usr/local/

total 16
drwxr-xr-x  32 root  wheel  1088 Jun 29 18:04 bin
drwxr-xr-x   3 root  wheel   102 Mar  6 14:40 etc
lrwxr-xr-x   1 root  wheel    18 Jul 12 19:27 include -> /opt/local/include
drwxr-xr-x  11 root  wheel   374 Jul 12 19:22 include-foo
lrwxr-xr-x   1 root  wheel    14 Jul 12 19:27 lib -> /opt/local/lib
drwxr-xr-x  25 root  wheel   850 Jul 12 19:23 lib-foo
drwxr-xr-x   8 root  wheel   272 Oct 11  2010 sbin
drwxr-xr-x   4 root  wheel   136 Jun 12 11:52 share

# at this point ./configure should work ok

是时候运行 make - 你会得到一堆错误:

Time to run make - you'll get a bunch of errors:

$ make

# on to the code bits:
# we need to adjust src/cimgffmpeg.cpp to support the latest version of ffmpeg
# a few things have moved from being deprecated to having been completely changed:

$ make 2>&1 | grep error

cimgffmpeg.cpp:57: error: 'av_open_input_file' was not declared in this scope
cimgffmpeg.cpp:70: error: 'CODEC_TYPE_VIDEO' was not declared in this scope
cimgffmpeg.cpp:134: error: 'avcodec_decode_video' was not declared in this scope
cimgffmpeg.cpp:202: error: 'av_open_input_file' was not declared in this scope
cimgffmpeg.cpp:216: error: 'CODEC_TYPE_VIDEO' was not declared in this scope
cimgffmpeg.cpp:283: error: 'avcodec_decode_video' was not declared in this scope
cimgffmpeg.cpp:339: error: 'av_open_input_file' was not declared in this scope
cimgffmpeg.cpp:357: error: 'av_open_input_file' was not declared in this scope
cimgffmpeg.cpp:368: error: 'CODEC_TYPE_VIDEO' was not declared in this scope
cimgffmpeg.cpp:399: error: 'av_open_input_file' was not declared in this scope
cimgffmpeg.cpp:410: error: 'CODEC_TYPE_VIDEO' was not declared in this scope

# change as follows; left: original downloaded source, right: modified source 

$ diff ~/Downloads/pHash-0.9.4-fresh/src/cimgffmpeg.cpp ~/dev/pHash-0.9.4/src/cimgffmpeg.cpp

57c57
<       if(av_open_input_file(&st_info->pFormatCtx, st_info->filename, NULL, 0, NULL)!=0)
---
>       if(avformat_open_input(&st_info->pFormatCtx, st_info->filename, NULL, NULL)!=0)

70c70
<       if(st_info->pFormatCtx->streams[i]->codec->codec_type==CODEC_TYPE_VIDEO) 
---
>       if(st_info->pFormatCtx->streams[i]->codec->codec_type==AVMEDIA_TYPE_VIDEO) 

134c134
<         avcodec_decode_video(st_info->pCodecCtx, pFrame, &frameFinished,packet.data, packet.size);
---
>         avcodec_decode_video2(st_info->pCodecCtx, pFrame, &frameFinished, &packet);

202c202
<       if(av_open_input_file(&(st_info->pFormatCtx),st_info->filename,NULL,0,NULL)!=0){
---
>       if(avformat_open_input(&(st_info->pFormatCtx),st_info->filename,NULL,NULL)!=0){

216c216
<           if(st_info->pFormatCtx->streams[i]->codec->codec_type==CODEC_TYPE_VIDEO) 
---
>           if(st_info->pFormatCtx->streams[i]->codec->codec_type==AVMEDIA_TYPE_VIDEO) 

282,283c282
<           avcodec_decode_video(st_info->pCodecCtx, pFrame, &frameFinished,
<                                packet.data,packet.size);
---
>           avcodec_decode_video2(st_info->pCodecCtx, pFrame, &frameFinished, &packet);

339c338
<   if (av_open_input_file(&pFormatCtx, file, NULL, 0, NULL))
---
>   if (avformat_open_input(&pFormatCtx, file, NULL, NULL))

357c356
<   if (av_open_input_file(&pFormatCtx, file, NULL, 0, NULL))
---
>   if (avformat_open_input(&pFormatCtx, file, NULL, NULL))

368c367
<        if(pFormatCtx->streams[i]->codec->codec_type==CODEC_TYPE_VIDEO) 
---
>        if(pFormatCtx->streams[i]->codec->codec_type==AVMEDIA_TYPE_VIDEO) 

399c398
<   if (av_open_input_file(&pFormatCtx, filename, NULL, 0, NULL))
---
>   if (avformat_open_input(&pFormatCtx, filename, NULL, NULL))

410c409
<            if(pFormatCtx->streams[i]->codec->codec_type==CODEC_TYPE_VIDEO) 
---
>            if(pFormatCtx->streams[i]->codec->codec_type==AVMEDIA_TYPE_VIDEO) 

我敢肯定，那真是太有趣了，不用担心我们快到了.

That was tons of fun I'm sure, no worries we're almost there.

# make should now complete with only useless warnings
$ make
$ sudo make -n install

# if all went well you've not got pHash with Java bindings
# let's build the Java files and test it

$ cd ll bindings/java/org/phash/
$ javac *.java

# go back to the Java bindins root and run
$ cd ../..

# oh yeah.. if you actually DID rename the include/lib dirs previously then: 
$ sudo rm /usr/local/lib
$ sudo rm /usr/local/include
$ sudo mv /usr/local/include-foo/ /usr/local/include
$ sudo mv /usr/local/lib-foo/ /usr/local/lib

# drum roll..
$ java -Djava.library.path=/usr/local/lib org/phash/pHash -mh ~/Downloads/s01.jpg ~/Downloads/s02.jpg 
File 1: /Users/xxx/Downloads/s01.jpg
File 2: /Users/xxx/Downloads/s02.jpg
0.3159722222222222

# now go try out your image recognition app ideas ;)

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