Pthreads
From FFmpeg on Windows
FFmpeg has support for native Win32 threads, but since some libraries use pthreads (like x264), it's preferable to use pthreads.
Go to pthreads-win32.
Get the latest version: download
Unpack it.
You will need to patch pthreads-win32 so it is usable by FFmpeg. There is a bug regarding POSIX compatibility. The patch is here: http://ffmpeg.arrozcru.org/wiki/images/1/12/Pthreads-w32-2-8-0.diff
Go to the folder and run make. You'll receive the following information:
Run one of the following command lines:
make clean GC (to build the GNU C dll with C cleanup code)
make clean GCE (to build the GNU C dll with C++ exception handling)
make clean GC-inlined (to build the GNU C inlined dll with C cleanup code)
make clean GCE-inlined (to build the GNU C inlined dll with C++ exception handling)
make clean GC-static (to build the GNU C inlined static lib with C cleanup code)
make clean GC-debug (to build the GNU C debug dll with C cleanup code)
make clean GCE-debug (to build the GNU C debug dll with C++ exception handling)
make clean GC-inlined-debug (to build the GNU C inlined debug dll with C cleanup code)
make clean GCE-inlined-debug (to build the GNU C inlined debug dll with C++ exception handling)
make clean GC-static-debug (to build the GNU C inlined static debug lib with C cleanup code)
If you want to use the static libraries, you will have to patch FFmpeg. The patch involves properly detecting the static library in configure and (un)initializing it. http://ffmpeg.arrozcru.org/wiki/images/d/dd/Ffmpeg_r15966_static_pthreads.diff
The pthreads-win32 developers suggest using the shared library.
We'll use the libraries with C cleanup code, since that's all we'll need.
Shared
make clean GC
Copy pthreadGC2.dll to your /lib folder.
Copy it again to the /bin folder, so that any executables linked to it can find it.
Copy it again to your /lib folder, without the GC2 part.
pthread.dll is necessary for the -lpthread flag to find it.
pthreadGC2.dll is the actual file that will be needed to run FFmpeg.
cp pthreadGC2.dll /mingw/lib
cp pthreadGC2.dll /mingw/bin
cp pthreadGC2.dll /mingw/lib/pthread.dll
Copy the necessary header files to your /include folder.
cp pthread.h sched.h /mingw/include
configure FFmpeg with --enable-pthreads, make and all should work fine.
Simplified instructions:
tar zxfv pthreads-w32-2-8-0-release.tar.gz
patch -p0 < pthreads-w32-2-8-0.diff
cd pthreads-w32-2-8-0-release
make clean GC
cp pthreadGC2.dll /mingw/lib
cp pthreadGC2.dll /mingw/bin
cp pthreadGC2.dll /mingw/lib/pthread.dll
cp pthread.h sched.h /mingw/include
Static
make clean GC-static
Copy libpthreadGC2.a to your /lib folder.
Copy the necessary header files to your /include folder.
Remember to patch FFmpeg to properly find the static pthreads-win32 library, then configure FFmpeg with --enable-pthreads, make and all should work fine.
Simplified instructions:
tar zxfv pthreads-w32-2-8-0-release.tar.gz
patch -p0 < pthreads-w32-2-8-0.diff
cd pthreads-w32-2-8-0-release
make clean GC-static
cp libpthreadGC2.a /mingw/lib
cp pthread.h sched.h /mingw/include
