安裝FFmpeg後,發現沒有生成ffplay的解決辦法
壓縮包的格式是.tar.bz2,解壓壓縮檔案,以ffmpeg-3.3.4為例,這裡需要用到的命令是:
$ tar -jxvf ffmpeg-3.3.4.tar.bz2
然後到解壓下的資料夾下檢視INSTALL.md
$ cat INSTALL.md
#Installing FFmpeg:
1. Type `./configure` to create the configuration. A list of configure
options is printed by running `configure –help`.
`configure` can be launched from a directory different from the FFmpeg
sources to build the objects out of tree. To do this, use an absolute
path when launching `configure`, e.g. `/ffmpegdir/ffmpeg/configure`.
2. Then type `make` to build FFmpeg. GNU Make 3.81 or later is required.
3. Type `make install` to install all binaries and libraries you built.
NOTICE
——
- Non system dependencies (e.g. libx264, libvpx) are disabled by default.
很清楚地說明了上述三個步驟。
所以執行第一步:
$ ./configure
提示:yasm/nasm not found or too old. Use –disable-yasm for a crippled build.
發現沒有安裝yasm,所以安裝yasm:
$ sudo apt-get install yasm
安裝後重新執行上述第一步操作,生成配置檔案然後進行編譯:
$ make
編譯時會出現一些warning,應該是可以忽略的,只要最後編譯通過並沒有報錯,編譯後安裝:
$ make install
發現問題:
mkdir: cannot create directory ‘/usr/local/share/man/man1’: Permission denied
doc/Makefile:155: recipe for target ‘install-man’ failed
make: *** [install-man] Error 1
這個錯誤的原因是:建立資料夾是沒有 許可權,所以用超級使用者身份執行:
$ sudo <span class="hljs-built_in"><span class="hljs-built_in">make</span></span> install</code><div class="hljs-button" data-title="複製"></div></pre>安裝成功後檢視版本:<pre onclick="hljs.copyCode(event)"><code class="language-ruby hljs">$ ffmpeg -version
- ffmpeg version 3.3.4 Copyright (c) 2000-2017 the FFmpeg developers
- built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.4) 20160609
- configuration:
- libavutil 55. 58.100 / 55. 58.100
- libavcodec 57. 89.100 / 57. 89.100
- libavformat 57. 71.100 / 57. 71.100
- libavdevice 57. 6.100 / 57. 6.100
- libavfilter 6. 82.100 / 6. 82.100
- libswscale 4. 6.100 / 4. 6.100
- libswresample 2. 7.100 / 2. 7.100
最後發現並沒有編譯出ffplay,在使用ffplay播放視訊的時候沒有找到ffplay.然後檢視configure生成的config.mak檔案,發現其中的關於
FFPLAY的一行前面有感嘆號:
!CONFIG_FFPLAY=yes
也就是在生成配置檔案時由於某些原因並沒有成功生成編譯ffplay的配置,最後查詢原因是由於缺少了兩個庫:
sdl2.0
sdl1.2
$ sudo apt-get install libsdl1.2-dev
其中出現了一個錯誤:
E: Failed to fetch http://202.119.32.195/cache/8/01/cn.archive.ubuntu.com/3991d768c0651a8fda450b69be432e3d/libpcre3-dev_8.38-3.1_amd64.deb Writing more data than expected (117288 > 113824)
E: Unable to fetch some archives, maybe run apt-get update or try with –fix-missing?
所以按照提示:
$ sudo apt-get install libsdl1.2-dev --fix-missing
安裝成功。接下來安裝sdl2.0:
我下載的是.tar.gz包,下載之後解壓:
$ tar -zxvf SDL2-2.0.6.tar.gz
解壓之後進入資料夾,進行編譯安裝:
這樣就安裝了sdl2.0
- $ mkdir build</div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="2"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">$ cd build
- $ ../configure</div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="4"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">$ make
- $ sudo make install
最後進入ffmpeg的資料夾進行清理:
- $ sudo <span class="hljs-built_in"><span class="hljs-built_in">make</span></span> uninstall</div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="2"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">$ make distclean
清理之後在進行上述的安裝ffmpeg步驟:
也可以去看在configure後生成的config.mak檔案中的關於FFPLAY的一行中的!消失:
- $ mkdir build</div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="2"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">$ cd ./build
- $ ../configure</div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="4"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">$ make
- $ sudo make install
CONFIG_FFPLAY=yes
最後安裝完成,FFplay就可以使用了!