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• Scalable video file integrity verification in python [closed]

  20 juillet 2024, par Discombobulous

  I have directory with 1 million video files nested under 100 sub-directories. I want to write a python script that verifies that these files are not corrupted, then delete the files that are corrupted. What's the most efficient way of doing this ? The machine it's running has 64 cpu-cores.

  


• (MinGW) libvorbis : system 'gcc' not recognized

  14 septembre 2016, par DuoDynamo

  I’m trying to compile some files with MinGW for use with ffmpeg (as per this tutorial). For some reason, whenever I try to run the following line for libvorbis :

  ./configure --prefix=/mingw --target=x86_64-win64-gcc

  I get the following error :

  checking build system type... i686-pc-mingw32
  checking host system type... i686-pc-mingw32
  checking target system type... Invalid configuration x86_64-win64-gcc’ : systemgcc’ not recognized
  configure : error : /bin/sh ./config.sub x86_64-win64-gcc failed

  This is very odd, seeing as the exact same line worked normally when working with libogg. It’s literally the same line, so I’m at a loss as to what could have gone wrong.

  I did try using an alternate line that goes as follows :

  ./configure --prefix=/mingw --target=x86_64-mingw64

  It did run (only with libvorbis-1.3.5, 1.3.3 still yields the same error as before), but at the end I got the following message :

  Could not run Ogg test program, checking why...
  The test program failed to compile or link. See the file config.log for the
  exact error that occured. This usually means Ogg was incorrectly installed
  or that you have moved Ogg since it was installed.
  configure : error : must have Ogg installed !

  And after this, I’m unable to use the make command. It gives me this message :

  make : *** No targets specified and no makefile found. Stop.

  Thanks in advance for any help.

• How to set CONFIG_PATH in Heroku buildpack

  3 avril 2015, par johnklawlor

  Before I elaborate on the problem, I should let you know that I’ve successfully installed ffmpegthumbnailer on heroku’s bash (heroku run bash).

  I’m trying to build ffmpegthumbnailer using a custom Heroku buildpack I’ve written, but when I run ./configure && make install in the bin/compile buildpack file, ffmpegthumbnailer tells me that it can’t find the ffmpeg libs (util, format, codec, scale) and suggest that I set the PKG_CONFIG_PATH. So I set the PKG_CONFIG_PATH and it still can’t seem to find the libraries.

  I’ve tried setting the PKG_CONFIG_PATH every which way. echo export, export, directly set it via PKG_CONFIG_PATH=/app... I’ve always set it inline with the .configure command. I even set PKG_CONFIG_PATH as a heroku config var, and tried to acces it via the ENV_DIR variable that’s passed into the buildpack as the third parameter, but I soon realized that I was simply setting a variable PKG_CONFIG_PATH to the contents of the file called PKG_CONFIG_PATH, i.e. I was setting PKG_CONFIG_PATH=/app/vendor..., which I’ve already done !! None of these have worked. Also, as you can see in the compile file and the log, echo $PKG_CONFIG_PATH prints the correct path.

  What more debugging can i do ? What is going on ?

  Below is my bin/compile buildpack file, and the log after I deploy my app to heroku.

  #!/bin/sh
  
  
  
  indent() {
  
    sed -u 's/^/       /'
  
  }
  
  
  
  echo "-----> Install ffmpeg-thumbnailer"
  
  BUILD_DIR=$1
  
  VENDOR_DIR="vendor"
  
  DOWNLOAD_URL="https://ffmpegthumbnailer.googlecode.com/files/ffmpegthumbnailer-2.0.8.tar.gz"
  
  
  
  echo "DOWNLOAD_URL = " $DOWNLOAD_URL | indent
  
  
  
  cd $BUILD_DIR
  
  mkdir -p $VENDOR_DIR
  
  cd $VENDOR_DIR
  
  curl -L --silent $DOWNLOAD_URL | tar xz
  
  cd ffmpegthumbnailer-2.0.8/
  
  export PKG_CONFIG_PATH="$PKG_CONFIG_PATH:/app/vendor/ffmpeg/lib/pkgconfig/"
  
  echo $PKG_CONFIG_PATH
  
  ./configure --prefix /app/vendor/ffmpegthumbnailer && make install
  
  
  
  echo "exporting PATH and LIBRARY_PATH" | indent
  
  PROFILE_PATH="$BUILD_DIR/.profile.d/ffmpeg-thumbnailer.sh"
  
  mkdir -p $(dirname $PROFILE_PATH)
  
  echo 'export PATH="$PATH:vendor/ffmpeg-thumbnailer/bin"' >> $PROFILE_PATH
  
  echo 'export LD_LIBRARY_PATH="$LD_LIBRARY_PATH:vendor/ffmpeg-thumbnailer/lib"' >> $PROFILE_PATH

  And my heroku deployment log...

  Fetching repository, done.
  
  Counting objects: 5, done.
  
  Delta compression using up to 2 threads.
  
  Compressing objects: 100% (3/3), done.
  
  Writing objects: 100% (3/3), 311 bytes, done.
  
  Total 3 (delta 2), reused 0 (delta 0)
  
  
  
  -----> Fetching custom git buildpack... done
  
  -----> Multipack app detected
  
  =====> Downloading Buildpack: https://github.com/shunjikonishi/heroku-buildpack-ffmpeg
  
  =====> Detected Framework: ffmpeg
  
  -----> Install ffmpeg
  
         DOWNLOAD_URL =  http://flect.github.io/heroku-binaries/libs/ffmpeg.tar.gz
  
         exporting PATH and LIBRARY_PATH
  
  =====> Downloading Buildpack: https://github.com/johnklawlor/heroku-buildpack-ffmpeg-thumbnailer
  
  =====> Detected Framework: ffmpeg
  
  -----> Install ffmpeg-thumbnailer
  
  HERE COMES PKG_CONFIG!
  
  /app/vendor/ffmpeg/lib/pkgconfig
  
         DOWNLOAD_URL =  https://ffmpegthumbnailer.googlecode.com/files/ffmpegthumbnailer-2.0.8.tar.gz
  
  /app/vendor/ffmpeg/lib/pkgconfig
  
  checking for a BSD-compatible install... /usr/bin/install -c
  
  checking whether build environment is sane... yes
  
  checking for a thread-safe mkdir -p... /bin/mkdir -p
  
  checking for gawk... no
  
  checking for mawk... mawk
  
  checking whether make sets $(MAKE)... yes
  
  checking for g++... g++
  
  checking whether the C++ compiler works... yes
  
  checking for C++ compiler default output file name... a.out
  
  checking for suffix of executables...
  
  checking whether we are cross compiling... no
  
  checking for suffix of object files... o
  
  checking whether we are using the GNU C++ compiler... yes
  
  checking whether g++ accepts -g... yes
  
  checking for style of include used by make... GNU
  
  checking dependency style of g++... gcc3
  
  checking build system type... x86_64-unknown-linux-gnu
  
  checking host system type... x86_64-unknown-linux-gnu
  
  checking how to print strings... printf
  
  checking for gcc... gcc
  
  checking whether we are using the GNU C compiler... yes
  
  checking whether gcc accepts -g... yes
  
  checking for gcc option to accept ISO C89... none needed
  
  checking dependency style of gcc... gcc3
  
  checking for a sed that does not truncate output... /bin/sed
  
  checking for grep that handles long lines and -e... /bin/grep
  
  checking for egrep... /bin/grep -E
  
  checking for fgrep... /bin/grep -F
  
  checking for ld used by gcc... /usr/bin/ld
  
  checking if the linker (/usr/bin/ld) is GNU ld... yes
  
  checking for BSD- or MS-compatible name lister (nm)... /usr/bin/nm -B
  
  checking the name lister (/usr/bin/nm -B) interface... BSD nm
  
  checking whether ln -s works... yes
  
  checking the maximum length of command line arguments... 1572864
  
  checking whether the shell understands some XSI constructs... yes
  
  checking whether the shell understands "+="... yes
  
  checking how to convert x86_64-unknown-linux-gnu file names to x86_64-unknown-linux-gnu format... func_convert_file_noop
  
  checking how to convert x86_64-unknown-linux-gnu file names to toolchain format... func_convert_file_noop
  
  checking for /usr/bin/ld option to reload object files... -r
  
  checking for objdump... objdump
  
  checking how to recognize dependent libraries... pass_all
  
  checking for dlltool... no
  
  checking how to associate runtime and link libraries... printf %s\n
  
  checking for ar... ar
  
  checking for archiver @FILE support... @
  
  checking for strip... strip
  
  checking for ranlib... ranlib
  
  checking command to parse /usr/bin/nm -B output from gcc object... ok
  
  checking for sysroot... no
  
  checking for mt... mt
  
  checking if mt is a manifest tool... no
  
  checking how to run the C preprocessor... gcc -E
  
  checking for ANSI C header files... yes
  
  checking for sys/types.h... yes
  
  checking for sys/stat.h... yes
  
  checking for stdlib.h... yes
  
  checking for string.h... yes
  
  checking for memory.h... yes
  
  checking for strings.h... yes
  
  checking for inttypes.h... yes
  
  checking for stdint.h... yes
  
  checking for unistd.h... yes
  
  checking for dlfcn.h... yes
  
  checking for objdir... .libs
  
  checking if gcc supports -fno-rtti -fno-exceptions... no
  
  checking for gcc option to produce PIC... -fPIC -DPIC
  
  checking if gcc PIC flag -fPIC -DPIC works... yes
  
  checking if gcc static flag -static works... yes
  
  checking if gcc supports -c -o file.o... yes
  
  checking if gcc supports -c -o file.o... (cached) yes
  
  checking whether the gcc linker (/usr/bin/ld -m elf_x86_64) supports shared libraries... yes
  
  checking whether -lc should be explicitly linked in... no
  
  checking dynamic linker characteristics... GNU/Linux ld.so
  
  checking how to hardcode library paths into programs... immediate
  
  checking whether stripping libraries is possible... yes
  
  checking if libtool supports shared libraries... yes
  
  checking whether to build shared libraries... yes
  
  checking whether to build static libraries... yes
  
  checking how to run the C++ preprocessor... g++ -E
  
  checking for ld used by g++... /usr/bin/ld -m elf_x86_64
  
  checking if the linker (/usr/bin/ld -m elf_x86_64) is GNU ld... yes
  
  checking whether the g++ linker (/usr/bin/ld -m elf_x86_64) supports shared libraries... yes
  
  checking for g++ option to produce PIC... -fPIC -DPIC
  
  checking if g++ PIC flag -fPIC -DPIC works... yes
  
  checking if g++ static flag -static works... yes
  
  checking if g++ supports -c -o file.o... yes
  
  checking if g++ supports -c -o file.o... (cached) yes
  
  checking whether the g++ linker (/usr/bin/ld -m elf_x86_64) supports shared libraries... yes
  
  checking dynamic linker characteristics... (cached) GNU/Linux ld.so
  
  checking how to hardcode library paths into programs... immediate
  
  checking for special C compiler options needed for large files... no
  
  checking for _FILE_OFFSET_BITS value needed for large files... no
  
  checking whether make supports nested variables... yes
  
  checking for ANSI C header files... (cached) yes
  
  checking for inttypes.h... (cached) yes
  
  checking for sys/stat.h... (cached) yes
  
  checking whether /usr/bin/ld -m elf_x86_64 accepts --as-needed... yes
  
  checking for pkg-config... /usr/bin/pkg-config
  
  checking pkg-config is at least version 0.9.0... yes
  
  checking for FFMPEG... no
  
  configure: error: Package requirements (libavutil libavformat libavcodec >= 52.26.0 libswscale) were not met:
  
  
  
  No package 'libavutil' found
  
  No package 'libavformat' found
  
  No package 'libavcodec' found
  
  No package 'libswscale' found
  
  
  
  Consider adjusting the PKG_CONFIG_PATH environment variable if you
  
  installed software in a non-standard prefix.
  
  
  
  Alternatively, you may set the environment variables FFMPEG_CFLAGS
  
  and FFMPEG_LIBS to avoid the need to call pkg-config.
  
  See the pkg-config man page for more details.
  
         exporting PATH and LIBRARY_PATH
  
  =====> Downloading Buildpack: https://github.com/heroku/heroku-buildpack-ruby