我正在我的64位Ubuntu 14机器上编译FFMPEG。除了libvpx库，所有的东西都编译得很好，它不断抛出错误：
[AS] vp9/common/x86/vp9_subpixel_8t_ssse3.asm.o
vp9/common/x86/vp9_subpixel_8t_ssse3.asm:856: warning: label alone on a line without a colon might be in error
vp9/common/x86/vp9_subpixel_8t_ssse3.asm:897: warning: label alone on a line without a colon might be in error
vp9/common/x86/vp9_subpixel_8t_ssse3.asm:970: warning: label alone on a line without a colon might be in error
vp9/common/x86/vp9_subpixel_8t_ssse3.asm:1002: warning: label alone on a line without a colon might be in error
vp9/common/x86/vp9_subpixel_8t_ssse3.asm:340: error: invalid combination of opcode and operands
vp9/common/x86/vp9_subpixel_8t_ssse3.asm:457: error: invalid combination of opcode and operands
vp9/common/x86/vp9_subpixel_8t_ssse3.asm:897: error: invalid combination of opcode and operands
vp9/common/x86/vp9_subpixel_8t_ssse3.asm:1002: error: invalid combination of opcode and operands
make[1]: *** [vp9/common/x86/vp9_subpixel_8t_ssse3.asm.o] Error 1
make: *** [.DEFAULT] Error 2
我遵循以下指南：https://trac.ffmpeg.org/wiki/CompilationGuide/Ubuntu我不知道这个错误是什么意思，但在某个地方读到用NASM编译libvpx是坏的，但我不知道如何编译它。安装1.2或1.1版本没有任何区别。有什么想法吗？
用Yasm编译它成功了：
PATH="$PATH:$HOME/bin" ./configure --prefix="$HOME/ffmpeg_build" --disable-examples
PATH="$PATH:$HOME/bin" make
假设Yasm是在主目录中编译的