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• How to use Visual Studio Compiled libs with MSYS pkg-config

  18 août 2017, par maxhap

  First a bit of background.

  I’m trying to compile ffmpeg on windows with the libass extensions/configuration option.

  Using the visual studio project libass-msvc I built libass using Visual Studio as a static lib.

  I then installed MinGW with MSYS and pkg-config. Following the instructions on the ffmpeg MSVC installation guide I configured the environment to build with the MSVC linker and to build in x64.

  When I try to configure libass for compilation using ./configure —enable-libass —toolchain=msvc I get the following error in the log file :

  File not found ass/ass.h
  
  pkg-config can not find libass

  I have tried the following to fix this.

  1. Create a .pc file for libass and add this to the PKG_CONFIG_PATH environment variable. See file content below. (After doing this pkg-config libass —version prints 0.81, not the right version number but at least something.)

  2. Copy libass .h files into a MinGW/include/ass folder and the .lib file into the MinGW/libs folder.

  3. Add libass include and bin folders to PATH environment variable

  4. Download libass and dependencies source then try to build it using MSYS with MSVC compiler. My aim here was to be able to use "make install" and let MinGW install libass to the correct locations. After hours of trying to fix linker errors, I abandoned this idea as some of the libass dependencies make files only work with the GCC GNU compiler.

  5. Compile libass with GCC GNU using MinGW make/make install then try and install libass using the GNU libs. Again this led to linker errors (I know this was a bad idea but was worth a try).

  6. Tried using extra lib and include build configuration options —extra-cflags="ffmpeg-dir/extra/include" \
     — extra-ldflags="ffmped-dir/extra/ffmpeg_build/lib" then adding the libs and .h files into those locations

  .pc file

  libass.pc:
  
  prefix=/MinGW
  
  includedir=libass-directory/include
  
  libdir=libass-director/x64/bin/
  
  
  
  Name: libass
  
  Description: Libass project
  
  Version: 0.13.7

  I am now completely stuck and out of ideas if anyone could give any insight or suggestions into what I’m doing wrong that would be fantastic.

  Thanks in advanced !

• Update Visual Studio 2005 files

  15 juillet 2019, par Erik de Castro Lopo

  Update Visual Studio 2005 files
  Patch-from : Janne Hyvärinen
  

  • [DH] src/libFLAC/libFLAC_dynamic.vcproj
  • [DH] src/libFLAC/libFLAC_static.vcproj

• How do I copy ALL metadata from flac/mp3 to alac with ffmpeg ? -movflags isn't working, default just copies basic metadata

  24 juillet 2021, par Architekt

  I've spent 2 days now reasearching this and all the info I've found doesn't work. If I do this simple command :

  


  ffmpeg -i test.mp3 -y -vn -c:a alac /storage/test.m4a


  


  it copies the standard tags. The -vn is to disable copying album art, I've given up on that. It's easier to just separately use AtomicParsley to handle it because some of the album art isn't height divisble by 2.

  


  Problem is, I have extra custom tags that I need as well. Not necessarily for this particular track, but for all the vinyl I spent 2 months archiving. I've tried using the -movflags use_metadata_tags option but that didn't do anything. In fact, it completely prevented the copying of any metadata whatsoever. Here's the command I tried :

  


  ffmpeg -i test.mp3 -y -movflags use_metadata_tags -vn -c:a alac /storage/test.m4a


  


  On my Windows machine, if I use Foobar2000 and convert the same file to m4a, it copies ALL metadata, 100% to the resultant m4a file. Sadly, I need to do this from a linux command line, as part of an automation process. Both commands I've tried show output metadata equivalent to the input (sans cover art), so I'm not sure what that's about. In case it helps, here's the full screen output when I use that latter command with the -movflags tag. I'm going to use a pastebin link so as to not clutter this post with the verbose output.

  


  I've tried -map_metadata 0 as well, same results, but that's to be expected as from what I've read that just copies the global/standard tags. This must be possible, otherwise I have no idea how foobar2000 would be able to do it. I'd love to just use that, but alas, as stated, I have to do this on Linux command line for this particular situation.