/tags/ffmpeg/Recent content in Ffmpeg on My BlogHugoen-usThu, 25 Oct 2018 00:00:00 +0000/2018/10/25/ffmepg/Thu, 25 Oct 2018 00:00:00 +0000/2018/10/25/ffmepg/<!-- toc --> <p>[TOC]</p> <h1 id="ffmpeg">FFmpeg</h1> <p>ffmpeg也可以读取文件和从设备中读取视频信号，还可以从多个音视频文件中读取，然后输出多个音视频文件。</p> <h2 id="centos">centos</h2> <div class="highlight"><pre tabindex="0" style="color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4;-webkit-text-size-adjust:none;"><code class="language-shell" data-lang="shell"><span style="display:flex;"><span>yum install ffmpeg </span></span><span style="display:flex;"><span><span style="color:#75715e"># centos系统自带的ffmpeg一般都是 2.x的版本，很难满足现在很多需求，可以添加其他第三方源来安装，或者编译安装。</span> </span></span><span style="display:flex;"><span>yum install yum-utils </span></span><span style="display:flex;"><span>yum-config-manager --add-repo https://negativo17.org/repos/epel-multimedia.repo </span></span><span style="display:flex;"><span>yum remove libva1-1.3.1-11.el7.x86_64 </span></span><span style="display:flex;"><span>yum install ffmpeg </span></span></code></pre></div><h2 id="ubuntu">ubuntu</h2> <div class="highlight"><pre tabindex="0" style="color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4;-webkit-text-size-adjust:none;"><code class="language-shell" data-lang="shell"><span style="display:flex;"><span>sudo apt install ffmpeg </span></span></code></pre></div><h2 id="conda">conda</h2> <div class="highlight"><pre tabindex="0" style="color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4;-webkit-text-size-adjust:none;"><code class="language-shell" data-lang="shell"><span style="display:flex;"><span><span style="color:#75715e"># conda安装的ffmpeg值存在于当前env环境中。</span> </span></span><span style="display:flex;"><span>conda install ffmpeg </span></span></code></pre></div><p>语法格式如下：</p> <pre tabindex="0"><code>ffmpeg [global_options] {[input_file_options] -i input_url} ... {[output_file_options] output_url} ... # 从视频文件读取 -i test.avi # 从设备读取 -i /dev/video0 # 从视频流读取 -i rtsp://your_ip:port/ # 设置尺寸 -s 640*480 # 输出为文件，直接在后面写出文件名即可 ffmpeg -f video4linux -r 10 -i /dev/video0 test.asf # 输出到视频流 ffmpeg -i /dev/video0 -f mpegts -codec:v mpeg1video http://localhost:8081/supersecret </code></pre><p>ffmpeg功能强大，参数巨多。详情请看<a href="https://www.ffmpeg.org/ffmpeg.html">ffmpeg官方文档</a></p>