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• FFmpeg MSVC Compilation stuck

  10 mai 2017, par Earinor

  For several days now I try to build the FFmpeg Libraries. I’m using Windows7 64 Bit and MSVC2010. I followed this guide : https://trac.ffmpeg.org/wiki/CompilationGuide/MSVC

  I got rid of a view errors and configure is working finally. But when I try make, it runs for like half an hour and then gets stuck. It won’t proceed, I kept it running over night and nothing happend. I also tried different compiler options but it gets stuck every time at the same point.

  ffv1dec.o_converted.c
  
  d:\cpplibraries\ffmpeg-master\libavcodec\get_bits.h(308) : warning C4101: 're_cache' : unreferenced local variable
  
  d:\cpplibraries\ffmpeg-master\libavcodec\golomb.h(360) : warning C4245: '=' : conversion from 'int' to 'unsigned int', signed/unsigned mismatch

  I also tried setting up a minGW64 Msys2 Environment but have the same issue there.
  I also tried another setup but when I get rid of some errors I always get stuck at the exact same position.

  The cl.exe is running and is using memory but nothing happens.

  I also get a ton of warnings like conversions from int to unsigned int, Makro redefinitions, etc.

  I have no idea where to look to fix this, so I would appreciate some help.

• Compiling custom FFMPEG for mp3/wav to flac conversion

  3 décembre 2019, par Arttu

  I need to compile ffmpeg from source for CentOS. The goal it to convert MP3 and WAV to FLAC. I tried to compile ffmpeg with this guide : https://trac.ffmpeg.org/wiki/CompilationGuide/Centos
  and it worked fine, but took approximately 20min and compiled a bunch unnecessary things, even thought I did not used next options as recommended in guide, but used :

  PATH="$HOME/bin:$PATH" PKG_CONFIG_PATH="$HOME/ffmpeg_build/lib/pkgconfig" ./configure \
  
  --prefix="/opt/tmg/ffmpeg_build" \
  
  --pkg-config-flags="--static" \
  
  --extra-cflags="-I/opt/tmg/ffmpeg_build/include" \
  
  --extra-ldflags="-L/opt/tmg/ffmpeg_build/lib" \
  
  --extra-libs=-lpthread \
  
  --extra-libs=-lm \
  
  --bindir="/opt/tmg/ffmpeg_build/bin" \
  
  --enable-gpl \
  
  --enable-libfreetype

  My question is what do I need for MP3 and WAV to FLAC and how do I compile just that part ?

  I found in configuration --disable-all option, but what do I have to enable ?

  Thanks in advance.

• Convert WAV to AIFF with ffmpeg

  15 février 2021, par Arete

  How can I convert a wav file to an AIF file with ffmpeg ?

  



  I need to make various files one in 16 Bit, one in 24 bit and one in 32 Bit.

  



  I also need to make different sample rates. E.g one in 176,400 kHz and one in 44,100 kHz.

  



  I know ffmpeg -i input-file.wav output-file.aif will convert the file but I am not sure about the rest.

  



  https://www.ffmpeg.org/general.html#Audio-Codecs says ffmpeg supports AIFF but there is no documentation on the AIFF encoding : https://en.wikipedia.org/wiki/Audio_Interchange_File_Format#AIFF-C_common_compression_types