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• ffmpeg conversion skips audio

  10 mars 2012, par user504879

  While converting a video to mp4 format using ffmpeg the audio gets skipped because of which the audio goes out of sync with the Video.

  One can have a look at the following Video: https://vialogues.com/vialogues/play/486

  I am using the following options for conversion

  /usr/local/bin/ffmpeg -y -i $inputfile -acodec libfaac -ar 44100 -ab 96k -vcodec libx264 -level 41 -bufsize 20000k -maxrate 25000k -g 250 -r 20 -s 480x270 -coder 1 -flags +loop -cmp +chroma -partitions +parti4x4+partp8x8+partb8x8 -flags2 +dct8x8+bpyramid -me_method umh -subq 7 -me_range 16 -keyint_min 25 -sc_threshold 40 -i_qfactor 0.71 -rc_eq 'blurCplx^(1-qComp)' -bf 16 -b_strategy 1 -bidir_refine 1 -refs 6 -crf 25 -deblockalpha 0 -vpre medium -deblockbeta 0 $outputfile
  

  Also the ffmpeg version is

  ffmpeg
  FFmpeg version 0.6.1, Copyright (c) 2000-2010 the FFmpeg developers
    built on Feb 19 2011 19:03:56 with gcc 4.4.5
    configuration: --enable-gpl --enable-version3 --enable-nonfree --enable-postproc --enable-libfaac --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxvid --enable-x11grab
    libavutil     50.15. 1 / 50.15. 1
    libavcodec    52.72. 2 / 52.72. 2
    libavformat   52.64. 2 / 52.64. 2
    libavdevice   52. 2. 0 / 52. 2. 0
    libswscale     0.11. 0 /  0.11. 0
    libpostproc   51. 2. 0 / 51. 2. 0
  Hyper fast Audio and Video encoder
  

  Any ideas as to why this would be happening?

• 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.

  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/'
  libavutil/../subdir.mak:26: warning: ignoring old commands for target `libavutil/'
  libavutil/../subdir.mak:96: warning: overriding commands for target `libavutil/'
  libavutil/../subdir.mak:96: warning: ignoring old commands for target `libavutil/'
  
  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'.  Stop.
  
  

  config.log contains

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

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

  Any solution to successfully build the code?

• Weird and unpredictable crash when using libx264 cross-compiled with MinGW

  2 mars 2012, par Daniel

  I'm working on a C++ project using Visual Studio 2010 on Windows. I'm linking dynamically against x264 which I built myself as a shared library using MinGW following the guide at

  http://www.ayobamiadewole.com/Blog/Others/x264compilation.aspx

  The strange thing is that my x264 code is working perfectly sometimes. Then when I change some line of code (or even change the comments in the file!) and recompile everything crashes on the line

  encoder_ = x264_encoder_open(&param);
  

  With the message

  Access violation reading location 0x00000000
  

  I'm not doing anything funky at all so it's probably not my code that is wrong but I guess there is something going wrong with the linking or maybe something is wrong with how I compiled x264.

  The full initialization code:

  x264_param_t param = { 0 };
  if (x264_param_default_preset(&param, "ultrafast", "zerolatency") < 0) {
    throw KStreamerException("x264_param_default_preset failed");
  }
  
  param.i_threads = 1;
  param.i_width = 640;
  param.i_height = 480;
  param.i_fps_num = 10;
  param.i_fps_den = 1;
  
  encoder_ = x264_encoder_open(&param); // <-----
  if (encoder_ == 0) {
    throw KStreamerException("x264_encoder_open failed");
  }
  
  x264_picture_alloc(&pic_, X264_CSP_I420, 640, 480);
  

  Edit: It turns out that it always works in Release mode and when using superfast instead of ultrafast it also works in Debug mode 100%. Could it be that the ultrafast mode is doing some crazy optimizations that the debugger doesn't like?

• What parameters are required to use x264 via ffmpeg ?

  15 février 2012, par nightWatcher

  i have an AVI file, i have decoded it into Raw form first, now i want to encode it in .h264 format. I am using libavcodec.dll and libavformat.dll. The point is when i try to open the codec from avcodec_open(AVCodecContext,AVCodec) It doesnot open. Am i missing some parameters that i need to specify for execution of this method for the lib x264? Any help will be deeply appreciated. Thanks

• x264_coeff_last64_sse2

  16 décembre 2011, par moose

  The x264 lib is crashing on Windows as always. Now, I'm trying to fix it, and I don't understand one thing. In the code we can see only the function signature:

  int x264_coeff_last64_sse2( dctcoef *dct );
  

  But, there is no implementation in *.h, *.c or *.asm source. How is that possible???

  (The function is called and it crashed, so it has to be linked in)