编译libav(ffmpeg)库
1、下载最新的yasm1.20,编译安装（最新的x264会用到）
http://www.tortall.net/projects/yasm/releases/yasm-1.2.0.tar.gz
2、下载最新的x264
3、下载最新的libav
其中：
http://www.tortall.net/projects/yasm/releases/yasm-1.2.0.tar.gz
2、下载最新的x264
export PATH=$PATH:/home/xy/mywork/av/yasm-1.2.0 ./configure --enable-gpl
3、下载最新的libav
sudo apt-get install libsdl1.2-dev (avplay 编译使用) http://libav.org/releases/libav-snapshot.tar.bz2 export PATH=$PATH:/home/xy/mywork/av/yasm-1.2.0 ./configure --enable-gpl --enable-libx264 --extra-cflags="-I/home/xy/mywork/av/x264-snapshot-20140218-2245" --extra-ldflags="-L/home/xy/mywork/av/x264-snapshot-20140218-2245" --extra-libs="-ldl"
其中：
1、编译加--enable-libx264选项时要加--enable-gql；为了找到x264要加上--extra-cflags和--extra-ldflags,要编译x264不出错；要加上--extra-libs="-ldl"
configure的结果：
xy@xy-laptop:~/mywork/av/libav-2014-03-02$ ./configure --enable-gpl --enable-libx264 --extra-cflags="-I/home/xy/mywork/av/x264-snapshot-20140218-2245" --extra-ldflags="-L/home/xy/mywork/av/x264-snapshot-20140218-2245" --extra-libs="-ldl" install prefix /usr/local source path . C compiler gcc C library glibc ARCH x86 (generic) big-endian no runtime cpu detection no yasm yes MMX enabled yes MMXEXT enabled yes 3DNow! enabled yes 3DNow! extended enabled yes SSE enabled yes SSSE3 enabled yes AVX enabled yes XOP enabled yes FMA3 enabled yes FMA4 enabled yes i686 features enabled yes CMOV is fast no EBX available yes EBP available yes debug symbols yes optimize for size no optimizations yes static yes shared no new filter support yes network support yes threading support pthreads safe bitstream reader yes SDL support no External libraries: libx264 zlib Enabled decoders: aac cllc lagarith aac_latm comfortnoise loco aasc cook mace3 ac3 cscd mace6 adpcm_4xm cyuv mdec adpcm_adx dca metasound adpcm_ct dfa mimic adpcm_ea dnxhd mjpeg adpcm_ea_maxis_xa dpx mjpegb adpcm_ea_r1 dsicinaudio mlp adpcm_ea_r2 dsicinvideo mmvideo adpcm_ea_r3 dvbsub motionpixels adpcm_ea_xas dvdsub mp1 adpcm_g722 dvvideo mp1float adpcm_g726 dxa mp2 adpcm_ima_amv dxtory mp2float adpcm_ima_apc eac3 mp3 adpcm_ima_dk3 eacmv mp3adu adpcm_ima_dk4 eamad mp3adufloat adpcm_ima_ea_eacs eatgq mp3float adpcm_ima_ea_sead eatgv mp3on4 adpcm_ima_iss eatqi mp3on4float adpcm_ima_qt eightbps mpc7 adpcm_ima_smjpeg eightsvx_exp mpc8 adpcm_ima_wav eightsvx_fib mpeg1video adpcm_ima_ws escape124 mpeg2video adpcm_ms escape130 mpeg4 adpcm_sbpro_2 ffv1 msa1 adpcm_sbpro_3 ffvhuff msmpeg4v1 adpcm_sbpro_4 fic msmpeg4v2 adpcm_swf flac msmpeg4v3 adpcm_thp flashsv msrle adpcm_xa flashsv2 mss1 adpcm_yamaha flic mss2 aic flv msvideo1 alac fourxm mszh als fraps mts2 amrnb frwu mxpeg amrwb g2m nellymoser amv g723_1 nuv anm gif pam ansi gsm pbm ape gsm_ms pcm_alaw ass h261 pcm_bluray asv1 h263 pcm_dvd asv2 h263i pcm_f32be atrac1 h264 pcm_f32le atrac3 hevc pcm_f64be atrac3p hnm4_video pcm_f64le aura huffyuv pcm_lxf aura2 iac pcm_mulaw avs idcin pcm_s16be bethsoftvid iff_byterun1 pcm_s16le bfi iff_ilbm pcm_s16le_planar bink imc pcm_s24be binkaudio_dct indeo2 pcm_s24daud binkaudio_rdft indeo3 pcm_s24le bmp indeo4 pcm_s24le_planar bmv_audio indeo5 pcm_s32be bmv_video interplay_dpcm pcm_s32le c93 interplay_video pcm_s32le_planar cavs jpeg2000 pcm_s8 cdgraphics jpegls pcm_s8_planar cdxl jv pcm_u16be cinepak kgv1 pcm_u16le cljr kmvc pcm_u24be pcm_u24le sipr vmdaudio pcm_u32be smackaud vmdvideo pcm_u32le smacker vmnc pcm_u8 smc vorbis pcm_zork sol_dpcm vp3 pcx sp5x vp5 pgm srt vp6 pgmyuv sunrast vp6a pgssub svq1 vp6f pictor svq3 vp8 png tak vp9 ppm targa vqa prores theora wavpack ptx thp webp qcelp tiertexseqvideo wmalossless qdm2 tiff wmapro qdraw tmv wmav1 qpeg truehd wmav2 qtrle truemotion1 wmavoice r10k truemotion2 wmv1 r210 truespeech wmv2 ra_144 tscc wmv3 ra_288 tscc2 wmv3image ralf tta wnv1 rawvideo twinvq ws_snd1 rl2 txd xan_dpcm roq ulti xan_wc3 roq_dpcm utvideo xan_wc4 rpza v210 xl rv10 v210x xsub rv20 v410 xwd rv30 vb yop rv40 vble zerocodec s302m vc1 zlib sgi vc1image zmbv shorten vcr1 Enabled encoders: a64multi h263p pcm_u32le a64multi5 huffyuv pcm_u8 aac jpegls pcx ac3 libx264 pgm ac3_fixed ljpeg pgmyuv adpcm_adx mjpeg png adpcm_g722 mp2 ppm adpcm_g726 mpeg1video prores adpcm_ima_qt mpeg2video qtrle adpcm_ima_wav mpeg4 ra_144 adpcm_ms msmpeg4v2 rawvideo adpcm_swf msmpeg4v3 roq adpcm_yamaha nellymoser roq_dpcm alac pam rv10 ass pbm rv20 asv1 pcm_alaw sgi asv2 pcm_f32be sunrast bmp pcm_f32le svq1 cljr pcm_f64be targa comfortnoise pcm_f64le tiff dnxhd pcm_mulaw utvideo dpx pcm_s16be v210 dvbsub pcm_s16le v410 dvdsub pcm_s24be vorbis dvvideo pcm_s24daud wmav1 eac3 pcm_s24le wmav2 ffv1 pcm_s32be wmv1 ffvhuff pcm_s32le wmv2 flac pcm_s8 xbm flashsv pcm_u16be xsub flv pcm_u16le xwd gif pcm_u24be zlib h261 pcm_u24le zmbv h263 pcm_u32be Enabled hwaccels: Enabled parsers: aac flac mpegvideo aac_latm gsm png ac3 h261 pnm adx h263 rv30 cavsvideo h264 rv40 cook hevc tak dca mjpeg vc1 dirac mlp vorbis dnxhd mpeg4video vp3 dvbsub mpegaudio vp8 dvdsub Enabled demuxers: aac image2 pcm_u32be ac3 image2pipe pcm_u32le adx ingenient pcm_u8 aea ipmovie pmp aiff iss pva amr iv8 qcp anm ivf r3d apc jv rawvideo ape latm rl2 asf lmlm4 rm ass lxf roq au m4v rpl avi matroska rso avs mjpeg rtp bethsoftvid mlp rtsp bfi mm sap bink mmf sdp bmv mov segafilm c93 mp3 shorten caf mpc siff cavsvideo mpc8 smacker cdg mpegps smjpeg cdxl mpegts sol daud mpegtsraw sox dfa mpegvideo spdif dirac msnwc_tcp srt dnxhd mtv str dsicin mvi swf dts mxf tak dv mxg thp dxa nc tiertexseq ea nsv tmv ea_cdata nut truehd eac3 nuv tta ffm ogg tty ffmetadata oma txd filmstrip pcm_alaw vc1 flac pcm_f32be vc1t flic pcm_f32le vmd flv pcm_f64be voc fourxm pcm_f64le vqf g722 pcm_mulaw w64 g723_1 pcm_s16be wav gsm pcm_s16le wc3 gxf pcm_s24be wsaud h261 pcm_s24le wsvqa h263 pcm_s32be wtv h264 pcm_s32le wv hevc pcm_s8 xa hls pcm_u16be xmv hnm pcm_u16le xwma idcin pcm_u24be yop iff pcm_u24le yuv4mpegpipe ilbc Enabled muxers: a64 image2 pcm_s16be ac3 image2pipe pcm_s16le adts ipod pcm_s24be adx ismv pcm_s24le aiff ivf pcm_s32be amr latm pcm_s32le asf m4v pcm_s8 asf_stream matroska pcm_u16be ass matroska_audio pcm_u16le au md5 pcm_u24be avi mjpeg pcm_u24le avm2 mlp pcm_u32be cavsvideo mmf pcm_u32le crc mov pcm_u8 daud mp2 psp dirac mp3 rawvideo dnxhd mp4 rm dts mpeg1system roq dv mpeg1vcd rso eac3 mpeg1video rtp f4v mpeg2dvd rtsp ffm mpeg2svcd sap ffmetadata mpeg2video segment filmstrip mpeg2vob smjpeg flac mpegts smoothstreaming flv mpjpeg sox framecrc mxf spdif framemd5 mxf_d10 srt g722 null swf gif nut tg2 gxf ogg tgp h261 oma truehd h263 pcm_alaw vc1t h264 pcm_f32be voc hds pcm_f32le wav hevc pcm_f64be webm hls pcm_f64le wv ilbc pcm_mulaw yuv4mpegpipe Enabled protocols: concat httpproxy rtmpt crypto md5 rtp ffrtmphttp mmsh srtp file mmst tcp gopher pipe udp hls rtmp unix http Enabled filters: aformat drawbox overlay amix fade pad anull fieldorder pixdesctest anullsink format resample anullsrc fps rgbtestsrc asetpts framepack scale ashowinfo gradfun select asplit hflip setdar asyncts hqdn3d setpts atrim interlace setsar blackframe join settb boxblur lut showinfo channelmap lutrgb split channelsplit lutyuv testsrc color movie transpose compand negate trim copy noformat unsharp crop null vflip cropdetect nullsink volume delogo nullsrc yadif Enabled bsfs: aac_adtstoasc imx_dump_header noise chomp mjpeg2jpeg remove_extradata dump_extradata mjpega_dump_header text2movsub h264_mp4toannexb mov2textsub Enabled indevs: dv1394 oss v4l2 fbdev Enabled outdevs: oss License: GPL version 2 or later Creating config.mak and config.h... config.h is unchanged config.asm is unchanged libavutil/avconfig.h is unchanged xy@xy-laptop:~/mywork/av/libav-2014-03-02$ make -j20
相关代码已打包上传到：
http://download.csdn.net/detail/xyyangkun/6990663