./configure --disable-yasm
make
make install

264 is available at ​http://www.videolan.org/developers/x264.html. FFmpeg depends on x264 when compiled with –enable-libx264 and x264 depends on FFmpeg when compiled with –enable-lavf-input. The best way to handle it is to install x264 first without –enable-lavf-input, then compile FFmpeg with –enable-libx264 and finally compile x264 again with –enable-lavf-input.

pdeneef@semarang:~/Projects/media-utils/n2.3# ffmpeg
FFmpeg version SVN-r26402, Copyright (c) 2000-2011 the FFmpeg developers
built on Aug 3 2013 14:56:13 with llvm_gcc 4.2.1 (Based on Apple Inc. build 5658) (LLVM build 2336.11.00)
configuration: –enable-libmp3lame –enable-shared –disable-mmx –arch=x86_64
libavutil 50.36. 0 / 50.36. 0
libavcore 0.16. 1 / 0.16. 1
libavcodec 52.108. 0 / 52.108. 0
libavformat 52.93. 0 / 52.93. 0
libavdevice 52. 2. 3 / 52. 2. 3
libavfilter 1.74. 0 / 1.74. 0
libswscale 0.12. 0 / 0.12. 0
Hyper fast Audio and Video encoder
usage: ffmpeg [options] [[infile options] -i infile]… {[outfile options] outfile}…

Use -h to get full help or, even better, run ‘man ffmpeg’
pdeneef@semarang:~/Projects/media-utils/n2.3# ffmppeg
-bash: ffmppeg: command not found
pdeneef@semarang:~/Projects/media-utils/n2.3# ./ffmpeg
ffmpeg version 2.3 Copyright (c) 2000-2014 the FFmpeg developers
built on Jul 26 2014 10:47:31 with Apple LLVM version 5.1 (clang-503.0.40) (based on LLVM 3.4svn)
configuration: –disable-yasm
libavutil 52. 92.100 / 52. 92.100
libavcodec 55. 69.100 / 55. 69.100
libavformat 55. 48.100 / 55. 48.100
libavdevice 55. 13.102 / 55. 13.102
libavfilter 4. 11.100 / 4. 11.100
libswscale 2. 6.100 / 2. 6.100
libswresample 0. 19.100 / 0. 19.100
Hyper fast Audio and Video encoder
usage: ffmpeg [options] [[infile options] -i infile]… {[outfile options] outfile}…

Use -h to get full help or, even better, run ‘man ffmpeg’
pdeneef@semarang:~/Projects/media-utils/n2.3#