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== On Windows ==
 
== On Windows ==
  
The MXE builds >= 4.0.1-rc3 already includes the ffmpeg libs so video should run out of the box.
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=== using official mxe-build and ffmpeg binaries ===
  
[[Category:Octave Forge]]
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This is at the moment the preferred way for windows users and assumes that you've installed Octave from the official MXE build from https://ftp.gnu.org/gnu/octave/windows/ to the default path.
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Download the ffmpeg binaries for windows from https://ffmpeg.zeranoe.com/builds/. You need the "32-bit Dev" and "32-bit Shared" archive. These instructions were tested with
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* ffmpeg-20160105-git-68eb208-win32-shared.7z
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* ffmpeg-20160105-git-68eb208-win32-dev.7z
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Now
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* Extract the bin/*.dll from ffmpeg-20160105-git-68eb208-win32-shared.7z to C:\Octave\Octave-4.0.0\bin
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* Extract include/* from ffmpeg-20160105-git-68eb208-win32-dev.7z to C:\Octave\Octave-4.0.0\include (You should now, for example, see C:\Octave\Octave-4.0.0\include\libavutil\version.h)
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* Extract lib/* from ffmpeg-20160105-git-68eb208-win32-dev.7z to C:\Octave\Octave-4.0.0\lib
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Compile and install from Octave with
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<code>
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pkg -verbose -forge install video
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</code>
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Load it before any usage:
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<code>
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pkg load video
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</code>
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=== mxe-octave ===
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You can also use mxe-octave to include ffmpeg, there is already a target for it. Future versions of MXE-Octave builds will already have video included.
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= Known bugs =
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* On MXE-Octave with ffmpeg crosscompiled "clear all" after using "addframe" causes a segmentation fault
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<code>
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Program received signal SIGSEGV, Segmentation fault.
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[Switching to Thread 1956.0xdd4]
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0x77d6e3c6 in ntdll!RtlInitUnicodeString () from C:\Windows\SysWOW64\ntdll.dll
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(gdb) bt
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#0  0x77d6e3c6 in ntdll!RtlInitUnicodeString ()
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  from C:\Windows\SysWOW64\ntdll.dll
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#1  0x19380000 in ?? ()
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#2  0x77d6e013 in ntdll!RtlFreeHeap () from C:\Windows\SysWOW64\ntdll.dll
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#3  0x778698cd in msvcrt!free () from C:\Windows\syswow64\msvcrt.dll
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#4  0x19380000 in ?? ()
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#5  0x1dc016c6 in AVHandler::~AVHandler (this=0x1da579a8,
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    __in_chrg=<optimized out>) at AVHandler.cc:99
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#6  0x1dc0384a in Avifile::~Avifile (this=0x1dac8570,
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    __in_chrg=<optimized out>) at oct-avifile.cc:149
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</code>
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[[Category:Octave-Forge]]

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