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• Linking to libx264 library from c code Ubuntu

  30 janvier 2012, par Martin Conaghan

  I'm trying to write a small C application which uses the x264 API, and I'm having problems compiling the code with a link to the x264 libaray.

  In the /project/ directory there are two sub-folders :
  /project/mycode/ and
  /project/x264-snapshot-20120120-2245.

  I have installed x264 in the latter subdirectory using ./configure and then 'make'. As such the library I think I want to link to is /project/x264-snapshot-20120120-2245/libx264.a

  In /project/mycode/ I have a single source code file (prototype.c), which has the following imports :

  #include 
  
  #include 
  
  #include "../x264-snapshot-20120120-2245/x264_config.h"
  
  #include "../x264-snapshot-20120120-2245/x264.h"

  As expected, if I try to compile without linking to the x264 library, I get an error :

  /project/mycode: gcc -o prototype prototype.c
  
  /tmp/cc5NwRTp.o: In function `main':
  
  prototype.c:(.text+0x6c): undefined reference to `x264_param_default_preset'
  
  prototype.c:(.text+0xf6): undefined reference to `x264_param_apply_profile'
  
  collect2: ld returned 1 exit status

  So I try to link the library I mentioned above, but it isn't found :

  /project/mycode: gcc -o prototype prototype.c -I../x264-snapshot-20120120-2245/ -llibx264.a
  
  /usr/bin/ld: cannot find -llibx264.a
  
  collect2: ld returned 1 exit status

  I've tried a few variations, like :

  gcc -o prototype prototype.c -I../x264-snapshot-20120120-2245/ -l ../x264-snapshot-20120120-2245/libx264.a
  
  gcc -o prototype prototype.c -I../x264-snapshot-20120120-2245/ -llibx264
  
  gcc -I ../x264-snapshot-20120120-2245/ -llibx264.a -o prototype prototype.c

  As is probably obvious by now, I'm fairly new to this, so I'm hoping there is an easy solution

• How to solve libx264 not found when building ffmpeg-with-libx264-enabled for android ?

  6 mars 2012, par newentry

  i am trying build android-ffmpeg-x264 downloaded from git. Link https://github.com/halfninja/android-ffmpeg-x264

  After running ./config_make_everything.sh i am getting following error

  ERROR : libx264 not found

  If you think configure made a mistake, make sure you are using the latest
  version from Git. If the latest version fails, report the problem to the
  ffmpeg-user@ffmpeg.org mailing list or IRC #ffmpeg on irc.freenode.net.
  Include the log file "config.log" produced by configure as this will help
  solving the problem.

  <pre>
  
  Makefile:1: config.mak: No such file or directory
  
  libavutil/Makefile:1: libavutil/../config.mak: No such file or directory
  
  libavutil/../subdir.mak:96: warning: overriding commands for target `libavutil/&#39;
  
  libavutil/../subdir.mak:26: warning: ignoring old commands for target `libavutil/&#39;
  
  libavutil/../subdir.mak:96: warning: overriding commands for target `libavutil/&#39;
  
  libavutil/../subdir.mak:96: warning: ignoring old commands for target `libavutil/&#39;
  
  
  
  tests/Makefile:44: /tests/fate.mak: No such file or directory
  
  tests/Makefile:45: /tests/fate2.mak: No such file or directory
  
  tests/Makefile:47: /tests/fate/aac.mak: No such file or directory
  
  tests/Makefile:48: /tests/fate/als.mak: No such file or directory
  
  tests/Makefile:49: /tests/fate/fft.mak: No such file or directory
  
  tests/Makefile:50: /tests/fate/h264.mak: No such file or directory
  
  tests/Makefile:51: /tests/fate/mp3.mak: No such file or directory
  
  tests/Makefile:52: /tests/fate/vorbis.mak: No such file or directory
  
  tests/Makefile:53: /tests/fate/vp8.mak: No such file or directory
  
  make: *** No rule to make target `/tests/fate/vp8.mak&#39;.  Stop.
  
  </pre>

  config.log contains

  <pre>
  
      ratecontrol.c:(.text+0xa400): undefined reference to `memset&#39;
  
  ratecontrol.c:(.text+0xa41c): undefined reference to `memset&#39;
  
  ratecontrol.c:(.text+0xa448): undefined reference to `__aeabi_l2d&#39;
  
  ratecontrol.c:(.text+0xa49c): undefined reference to `__aeabi_ldivmod&#39;
  
  ratecontrol.c:(.text+0xa4a0): undefined reference to `__aeabi_l2d&#39;
  
  ratecontrol.c:(.text+0xa4f8): undefined reference to `__aeabi_idivmod&#39;
  
  ratecontrol.c:(.text+0xa794): undefined reference to `__aeabi_l2d&#39;
  
  ../x264/libx264.a(set.o): In function `x264_validate_levels&#39;:
  
  set.c:(.text+0x200): undefined reference to `__aeabi_ldivmod&#39;
  
  set.c:(.text+0x334): undefined reference to `__aeabi_idiv&#39;
  
  ../x264/libx264.a(set.o): In function `x264_sei_version_write&#39;:
  
  set.c:(.text+0xeec): undefined reference to `strlen&#39;
  
  set.c:(.text+0xf10): undefined reference to `memcpy&#39;
  
  set.c:(.text+0xf3c): undefined reference to `sprintf&#39;
  
  set.c:(.text+0xf44): undefined reference to `strlen&#39;
  
  ../x264/libx264.a(set.o): In function `scaling_list_write&#39;:
  
  set.c:(.text+0x20b0): undefined reference to `memcmp&#39;
  
  set.c:(.text+0x2138): undefined reference to `memcmp&#39;
  
  set.c:(.text+0x2158): undefined reference to `memcmp&#39;
  
  ../x264/libx264.a(set.o): In function `x264_pps_write&#39;:
  
  set.c:(.text+0x5870): undefined reference to `memcmp&#39;
  
  set.c:(.text+0x5a7c): undefined reference to `memcmp&#39;
  
  ../x264/libx264.a(set.o):set.c:(.text+0x5a9c): more undefined references to `memcmp&#39; follow
  
  ../x264/libx264.a(macroblock.o): In function `x264_noise_reduction_update&#39;:
  
  macroblock.c:(.text+0xe10): undefined reference to `__aeabi_uldivmod&#39;
  
  ../x264/libx264.a(macroblock.o): In function `x264_predict_lossless_8x8_chroma&#39;:
  
  macroblock.c:(.text+0x3224): undefined reference to `memcpy&#39;
  
  macroblock.c:(.text+0x323c): undefined reference to `memcpy&#39;
  
  ../x264/libx264.a(cabac.o): In function `x264_macroblock_write_cabac&#39;:
  
  cabac.c:(.text+0x2c58): undefined reference to `__assert2&#39;
  
  cabac.c:(.text+0x2dd8): undefined reference to `__assert2&#39;
  
  cabac.c:(.text+0x2f80): undefined reference to `__assert2&#39;
  
  cabac.c:(.text+0x3020): undefined reference to `__assert2&#39;
  
  ../x264/libx264.a(rectangle.o): In function `x264_macroblock_cache_ref_1_1&#39;:
  
  rectangle.c:(.text+0x1e4): undefined reference to `__assert2&#39;
  
  ../x264/libx264.a(rectangle.o):rectangle.c:(.text+0x210): more undefined references to `__assert2&#39; follow
  
  ERROR: libx264 not found
  
  </pre>

  1.I am using fedora to build both ffmpeg and x264
  2.NDK r7

  Any solution to successfully build the code ?

• Create thumbnail image from video in server in php

  28 février 2014, par swamy

  In my website I have a option to upload video file by the user. In that I want to create a thumbnail image of that video. I have tried in local system with some coding it is working fine. I tried same coding in to service it is not working. I checked for ffmpeg enabled in server, it was disabled. Is their any other option to creating thumbnail in server with out enabling the ffmpeg ? Please help me to find the solution.