linux FFMPEG 完整安装

    现在最新的FFMPEG 他自带有音频和视频解码的库，可能是因为版权的一些问题，它没有自带编码音频和视频的库，另外，如果需要使用ffplay 进行视频播放，还需要安装SDL。下面介绍在linux 下，以H264 和 MP3 视音频编码 SDL显示为例的安装。

    1、下载最新的安装代码。

        LAME 音频编码：http://lame.sourceforge.net/download.php

        X264 视频编码 ：http://www.videolan.org/developers/x264.html

        SDL 显示库： http://www.libsdl.org/download-2.0.php

        FFMPEG ： http://www.ffmpeg.org/download.html

 

    2、 安装MP3编码库

        ./configure
        make
        make install

 

    3、安装X264视频编码库

        ./configure --enable-shared
        make
        make install

        如果安装过程中提示yasm版本过低，可以使用 ./configure --enable-shared --disable-asm 关闭yasm，然后再安装。也可以自己先升级yasm后再安装。

 

    4、SDL显示安装

        ./configure
        make
        make install

 

    5、安装FFMPEG

        ./configure --enable-libmp3lame --enable-libx264 --enable-gpl

        make

        make install

 

安装测试：

    可以使用下面命令进行测试编解码:

         ffmpeg -i Forrest_Gump_IMAX.mp4 -vcodec libx264 -b:v 1200k -r 25 -acodec mp3 -ab 128k -ar 44100 output.mp4

    编解码信息：

Forrest_Gump_IMAX.mp4  Makefile  test  test.avi  transcoding.c  transcoding.o  Warcraft3_End.avi
licaibiao@ubuntu:~/test/FFMPEG/examples$ ffmpeg -i Forrest_Gump_IMAX.mp4 -vcodec libx264 -b:v 1200k -r 25 -acodec mp3 -ab 128k -ar 44100 output.mp4        
ffmpeg version 3.2.4 Copyright (c) 2000-2017 the FFmpeg developers
  built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.4) 20160609
  configuration: --enable-libmp3lame --enable-libx264 --enable-gpl --enable-shared --disable-yasm
  libavutil      55. 34.101 / 55. 34.101
  libavcodec     57. 64.101 / 57. 64.101
  libavformat    57. 56.101 / 57. 56.101
  libavdevice    57.  1.100 / 57.  1.100
  libavfilter     6. 65.100 /  6. 65.100
  libswscale      4.  2.100 /  4.  2.100
  libswresample   2.  3.100 /  2.  3.100
  libpostproc    54.  1.100 / 54.  1.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'Forrest_Gump_IMAX.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf56.19.100
  Duration: 00:00:31.21, start: -0.013061, bitrate: 878 kb/s
    Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 640x352, 748 kb/s, 23.98 fps, 23.98 tbr, 24k tbn, 47.95 tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 128 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
[libx264 @ 0xdb7040] using cpu capabilities: none!
[libx264 @ 0xdb7040] profile High, level 3.0
[libx264 @ 0xdb7040] 264 - core 148 r2762 90a61ec - H.264/MPEG-4 AVC codec - Copyleft 2003-2017 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=1 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=abr mbtree=1 bitrate=1200 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, mp4, to 'output.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf57.56.101
    Stream #0:0(und): Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 640x352, q=-1--1, 1200 kb/s, 25 fps, 12800 tbn, 25 tbc (default)
    Metadata:
      handler_name    : VideoHandler
      encoder         : Lavc57.64.101 libx264
    Side data:
      cpb: bitrate max/min/avg: 0/0/1200000 buffer size: 0 vbv_delay: -1
    Stream #0:1(und): Audio: mp3 (libmp3lame) (i[0][0][0] / 0x0069), 44100 Hz, stereo, fltp, 128 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
      encoder         : Lavc57.64.101 libmp3lame
Stream mapping:
  Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
  Stream #0:1 -> #0:1 (aac (native) -> mp3 (libmp3lame))
Press [q] to stop, [?] for help
frame=  776 fps= 15 q=21.0 Lsize=    4966kB time=00:00:31.21 bitrate=1303.1kbits/s dup=32 drop=0 speed=0.597x    
video:4448kB audio:488kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.592174%
[libx264 @ 0xdb7040] frame I:20    Avg QP:12.04  size: 31577
[libx264 @ 0xdb7040] frame P:249   Avg QP:16.40  size: 10618
[libx264 @ 0xdb7040] frame B:507   Avg QP:19.30  size:  2523
[libx264 @ 0xdb7040] consecutive B-frames:  6.2% 14.9% 15.5% 63.4%
[libx264 @ 0xdb7040] mb I  I16..4: 35.2% 18.1% 46.7%
[libx264 @ 0xdb7040] mb P  I16..4:  5.6%  8.1%  4.2%  P16..4: 29.1% 14.9%  9.8%  0.0%  0.0%    skip:28.3%
[libx264 @ 0xdb7040] mb B  I16..4:  0.5%  0.7%  0.5%  B16..8: 30.5%  6.3%  2.7%  direct: 3.6%  skip:55.0%  L0:46.7% L1:39.4% BI:13.9%
[libx264 @ 0xdb7040] final ratefactor: 16.45
[libx264 @ 0xdb7040] 8x8 transform intra:37.3% inter:44.7%
[libx264 @ 0xdb7040] coded y,uvDC,uvAC intra: 53.5% 56.6% 26.9% inter: 17.0% 15.4% 1.8%
[libx264 @ 0xdb7040] i16 v,h,dc,p: 44% 33% 11% 11%
[libx264 @ 0xdb7040] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 13% 32% 21%  4%  6%  5%  7%  5%  7%
[libx264 @ 0xdb7040] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 14% 32% 14%  5%  7%  7%  8%  6%  8%
[libx264 @ 0xdb7040] i8c dc,h,v,p: 50% 32% 11%  6%
[libx264 @ 0xdb7040] Weighted P-Frames: Y:24.1% UV:20.1%
[libx264 @ 0xdb7040] ref P L0: 60.8% 20.7% 14.7%  3.5%  0.3%
[libx264 @ 0xdb7040] ref B L0: 88.1% 10.3%  1.6%
[libx264 @ 0xdb7040] ref B L1: 98.3%  1.7%
[libx264 @ 0xdb7040] kb/s:1173.84

显示测试：

        执行  ffplay output.mp4   效果如下：

 

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====================2016.06.12日更新===========================

 SDL2 安装后，运行程序当调用SDL_OpenAudio出现SDL_OpenAudio: No such audio device 的错误

需要进行下面的操作：

sudo apt-get install xorg-dev
sudo apt-get build-dep xscreensaver vlc totem
sudo apt-get source xscreensaver totem -b

./configure
make
sudo make install
cd test
./configure
make
./testmultiaudio
正常时，运行SDL2自带的测试程序testmultiaudio 可以听到声音，表示设备和SDL2安装成功。

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