在Windows环境下，FFMPEG支持使用h264

FFmpeg version UNKNOWN, Copyright (c) 2000-2009 Fabrice Bellard, et al. configuration: --prefix=/f/usr/ffmpeg_build413 --enable-memalign-hack --enable -gpl --enable-nonfree --enable-shared --enable-libmp3lame --enable-libamr-nb --e nable-libamr-wb --enable-libfaac --enable-libfaad --enable-libx264 --enable-libx vid --enable-avisynth libavutil 50. 3. 0 / 50. 3. 0 libavcodec 52.25. 0 / 52.25. 0 libavformat 52.32. 0 / 52.32. 0 libavdevice 52. 2. 0 / 52. 2. 0 libswscale 0. 7. 1 / 0. 7. 1 built on Apr 13 2009 22:45:09, gcc: 4.3.2 At least one output file must be specified