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• ffmpeg performance with hundreds of cuts (atrim)

  25 mai 2021, par drakon

  I have audio files (think 2h) where I want to cut out a lot of pieces out of it (500+) and a ffmpeg command like this one :

  


  ['ffmpeg', '-i', 'pipe:', '-filter_complex', 
'[0]atrim=end=30.69:start=0.0[s0];
 [0]atrim=end=34.31:start=31.18[s1];
 [0]atrim=end=38.65:start=34.43[s2]; 
 (... hundreds more)
 [s37][s38][s39][s40][s41]concat=a=1:n=42:v=0[s42]', '-map', '[s42]']


  


  Stream mapping built with ffmpeg-python :

  


    Stream #0:0 (mp3float) -> atrim
  (... hundreds more)
  Stream #0:0 (mp3float) -> atrim
  concat -> Stream #0:0 (libmp3lame)


  


  Now this works as expected but it takes locally something like 10mins for the files I have and when I deploy it to some server in the cloud it takes something like an hour. It definitely depends on the machine obviously and I definitely scale there the speed but I'd also like to know if there's a way to speed up the processing with ffmpeg itself.

  


  Thanks for any pointers !

  


• fatal error : Uncaught exception 'Alchemy\BinaryDriver\Exception\ExecutableNotFoundException' with message 'Executable not found, proposed

  6 septembre 2023, par arvindpundir

  I have installed https://github.com/PHP-FFMpeg/PHP-FFMpeg on linux

  



  hosting path is

  



  /public_html/videoconversion/


  



  I got this error.

  



  Fatal error: Uncaught exception 'Alchemy\BinaryDriver\Exception\ExecutableNotFoundException' with message 
'Executable not found, proposed : 
    public_html/videoconversion/' in 
        /home/deveducate/public_html/videoconversion/vendor/alchemy/binary-driver/src/Alchemy/BinaryDriver/AbstractBinary.php:160 Stack trace: 
        #0 /home/deveducate/public_html/videoconversion/vendor/php-ffmpeg/php-ffmpeg/src/FFMpeg/Driver/FFProbeDriver.php(48): 
            Alchemy\BinaryDriver\AbstractBinary::load('public_html/vid...', NULL, Object(Alchemy\BinaryDriver\Configuration)) 
        #1 /home/deveducate/public_html/videoconversion/vendor/php-ffmpeg/php-ffmpeg/src/FFMpeg/FFProbe.php(226): FFMpeg\Driver\FFProbeDriver::create(Array, NULL) 
        #2 /home/deveducate/public_html/videoconversion/vendor/php-ffmpeg/php-ffmpeg/src/FFMpeg/FFMpeg.php(117): FFMpeg\FFProbe::create(Array, NULL, NULL) 
        #3 /home/deveducate/public_html/videoconversion/convert_to_mp4.php(10): FFMpeg\FFMpeg::create(Array, NULL) 
        #4 {main} Next exception 'FFMpeg\Exception\ExecutableNotFoundException' with message 
           'U in /home/deveducate/public_html/videoconversion/vendor/php-ffmpeg/php-ffmpeg/src/FFMpeg/Driver/FFProbeDriver.php on line 50


  



  file

  



  require 'vendor/autoload.php';
$ffmpeg = FFMpeg\FFMpeg::create(array(
'ffmpeg.binaries'  => '/opt/local/ffmpeg/bin/ffmpeg',
'ffprobe.binaries' => '/opt/local/ffmpeg/bin/ffprobe',
'timeout'          => 3600, // The timeout for the underlying process
'ffmpeg.threads'   => 12,   // The number of threads that FFMpeg should 
 use
 ), $logger);
 $video = $ffmpeg->open('video.mpg');
$video
->filters()
->resize(new FFMpeg\Coordinate\Dimension(320, 240))
->synchronize();
$video
->frame(FFMpeg\Coordinate\TimeCode::fromSeconds(10))
->save('frame.jpg');
$video
->save(new FFMpeg\Format\Video\X264(), 'export-x264.mp4')


  



  May any one let me know where to update path.

  



  Thanks

  


• undefined reference to 'memset' while configuring ffmpeg

  20 mai 2013, par Jacques Giraudel

  I want to port ffmpeg on android to use it in an app (to convert video files in webm format).

  I use the following command to configure FFMPEG :

  ./configure --target-os=linux \
  
      --cross-prefix=arm-linux-androideabi \
  
      --arch=arm-linux \
  
      --sysroot=$TC_SYSROOT \
  
      --nm=$NM \
  
      --ar=$AR \
  
      --cc=$CC \
  
      --ld=$LD \
  
      --disable-symver \
  
      --enable-small \
  
      --enable-libvorbis \
  
      --enable-libvpx \
  
      --extra-cflags="-I$PROJECT_BASE/jni/libvorbis/build/include -I$PROJECT_BASE/jni/libogg/build/include -I$PROJECT_BASE/jni/libvpx/libvpx -I$PROJECT_BASE/jni/libvpx/libvpx/build/install/include" \
  
      --extra-ldflags="-L$PROJECT_BASE/jni/libvorbis/build/lib -L$PROJECT_BASE/jni/libogg/build/lib -L$PROJECT_BASE/jni/libvpx/libvpx/build/install/lib" \
  
      --prefix=$PROJECT_BASE/jni/ffmpeg/build

  I use a standalone toolchain (NDK compiler version : 4.6). I dont use the AS of the toolchain, when I try the command block (I have waited for 10 minutes without response, some starting infos in the config.log and it seems to block at the beginning of the compilation). The different lib and directory added are the build install of the libraries needed (ogg, vorbis and vpx).

  I obtain this message :

   /Bureau/TripApp/jni/ffmpeg /Bureau/TripApp/jni /Bureau/TripApp/jni
  ERROR : libvpx decoder version must be >=0.9.1

  When I look at the config.log file, I have :

  check_lib2 vpx/vpx_decoder.h vpx/vp8dx.h vpx_codec_dec_init_ver -lvpx
  
  check_func_headers vpx/vpx_decoder.h vpx/vp8dx.h vpx_codec_dec_init_ver -lvpx
  
  check_ld cc -lvpx
  
  check_cc
  
  BEGIN /tmp/ffconf.TOBhIIiF.c
  
      1   #include <vpx></vpx>vpx_decoder.h>
  
      2   #include <vpx></vpx>vp8dx.h>
  
      3   long check_vpx_codec_dec_init_ver(void) { return (long) vpx_codec_dec_init_ver; }
  
      4   int main(void) { return 0; }
  
  END /tmp/ffconf.TOBhIIiF.c
  
  /home/jacques/my-android-toolchain2/bin/arm-linux-androideabi-gcc --sysroot=/home/jacques/my-android-toolchain2/sysroot -D_ISOC99_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -DPIC -I/home/jacques/Bureau/TripApp/jni/libvorbis/build/include -I/home/jacques/Bureau/TripApp/jni/libogg/build/include -I/home/jacques/Bureau/TripApp/jni/libvpx/libvpx -I/home/jacques/Bureau/TripApp/jni/libvpx/libvpx/build/install/include -march=armv5te -std=c99 -fomit-frame-pointer -fPIC -marm -c -o /tmp/ffconf.bbOA0x5j.o /tmp/ffconf.TOBhIIiF.c
  
  /home/jacques/my-android-toolchain2/bin/arm-linux-androideabi-ld -L/home/jacques/Bureau/TripApp/jni/libvorbis/build/lib -L/home/jacques/Bureau/TripApp/jni/libogg/build/lib -L/home/jacques/Bureau/TripApp/jni/libvpx/libvpx/build/install/lib --sysroot=/home/jacques/my-android-toolchain2/sysroot -o /tmp/ffconf.IqRLz1B9 /tmp/ffconf.bbOA0x5j.o -lvpx -lvorbisenc -lvorbis -logg -lm -lz
  
  /home/jacques/my-android-toolchain2/bin/arm-linux-androideabi-ld: /home/jacques/Bureau/TripApp/jni/libvpx/libvpx/build/install/lib/libvpx.a(vpx_decoder.c.o): in function vpx_codec_dec_init_ver:(.text+0xc0): **error: undefined reference to &#39;memset&#39;**
  
  ERROR: libvpx decoder version must be >=0.9.1

  I have also a warning at the beginning of the file :

  WARNING: arm-linux-androideabipkg-config not found, library detection may fail.

  And many other errors which seem to be not blocking (eg : related to the support of older ARM version than the targeted one)

  libvpx is configured using the following command (the make succeeds) :

  ./libvpx/configure --target=armv5te-android-gcc --disable-examples \
  
                      --sdk-path=$NDK_BASE --prefix=$PROJECT_BASE/jni/libvpx/libvpx/build

  The NDK version used is r8e.

  My search on this :
  The libvpx version used is 1.1.0, memset is a function defined in string.h. String.h is present in the include dir of the sysroot used (and memset is defined).

  Do you see what could be the source of the problem ?