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<p>本备忘清单是 <a href="https://ffmpeg.org/">FFmpeg</a> 中常见视频处理操作的备忘清单</p>
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</svg></div><div class="menu-modal"><a aria-hidden="true" class="leve2 tocs-link" href="#参数参考">参数参考</a><a aria-hidden="true" class="leve3 tocs-link" href="#常用开关">常用开关</a><a aria-hidden="true" class="leve3 tocs-link" href="#音频">音频</a><a aria-hidden="true" class="leve3 tocs-link" href="#比特率">比特率</a><a aria-hidden="true" class="leve4 tocs-link" href="#视频">视频</a><a aria-hidden="true" class="leve2 tocs-link" href="#视频编辑">视频编辑</a><a aria-hidden="true" class="leve3 tocs-link" href="#裁剪">裁剪</a><a aria-hidden="true" class="leve3 tocs-link" href="#缩放">缩放</a><a aria-hidden="true" class="leve3 tocs-link" href="#视频帧速率">视频帧速率</a><a aria-hidden="true" class="leve3 tocs-link" href="#剪切视频部分">剪切视频部分</a><a aria-hidden="true" class="leve3 tocs-link" href="#h265-2-pass-编码">H265 2-pass 编码</a><a aria-hidden="true" class="leve3 tocs-link" href="#视频比特率设置">视频比特率设置</a><a aria-hidden="true" class="leve3 tocs-link" href="#固定旋转">固定旋转</a><a aria-hidden="true" class="leve3 tocs-link" href="#放慢视频速度">放慢视频速度</a><a aria-hidden="true" class="leve3 tocs-link" href="#缩放到特定宽度">缩放到特定宽度</a><a aria-hidden="true" class="leve2 tocs-link" href="#重新包装">重新包装</a><a aria-hidden="true" class="leve3 tocs-link" href="#提取音频流">提取音频流</a><a aria-hidden="true" class="leve3 tocs-link" href="#创建缩略图">创建缩略图</a><a aria-hidden="true" class="leve3 tocs-link" href="#处理-id3-标签">处理 id3 标签</a><a aria-hidden="true" class="leve3 tocs-link" href="#重新采样转换音频">重新采样/转换音频</a><a aria-hidden="true" class="leve3 tocs-link" href="#切换容器转换类型">切换容器(转换类型)</a><a aria-hidden="true" class="leve3 tocs-link" href="#音视频同步">音视频同步</a><a aria-hidden="true" class="leve3 tocs-link" href="#图片中的视频">图片中的视频</a><a aria-hidden="true" class="leve3 tocs-link" href="#将视频拆分为图像">将视频拆分为图像</a><a aria-hidden="true" class="leve3 tocs-link" href="#转换为-gif">转换为 Gif</a><a aria-hidden="true" class="leve3 tocs-link" href="#移除音频">移除音频</a><a aria-hidden="true" class="leve3 tocs-link" href="#字幕">字幕</a><a aria-hidden="true" class="leve3 tocs-link" href="#音量">音量</a><a aria-hidden="true" class="leve2 tocs-link" href="#另见">另见</a></div></div><div class="h1wrap-body"><div class="wrap h2body-exist"><div class="wrap-header h2wrap"><h2 id="参数参考"><a aria-hidden="true" tabindex="-1" href="#参数参考"><span class="icon icon-link"></span></a>参数参考</h2><div class="wrap-body">
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</div></div><div class="h2wrap-body"><div class="wrap h3body-not-exist"><div class="wrap-header h3wrap"><h3 id="常用开关"><a aria-hidden="true" tabindex="-1" href="#常用开关"><span class="icon icon-link"></span></a>常用开关</h3><div class="wrap-body">
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<pre class="language-bash"><code class="language-bash code-highlight"><span class="code-line"><span class="token parameter variable">-codecs</span> <span class="token comment"># 列出编解码器</span>
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</span><span class="code-line"><span class="token parameter variable">-c:v</span> <span class="token comment"># 视频编解码器(-vcodec)-'copy'复制流</span>
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</span><span class="code-line"><span class="token parameter variable">-c:a</span> <span class="token comment"># 音频编解码器(-acodec)</span>
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</span><span class="code-line"><span class="token parameter variable">-fs</span> SIZE <span class="token comment"># 限制文件大小（字节）</span>
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</span></code></pre>
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</div></div></div><div class="wrap h3body-not-exist"><div class="wrap-header h3wrap"><h3 id="音频"><a aria-hidden="true" tabindex="-1" href="#音频"><span class="icon icon-link"></span></a>音频</h3><div class="wrap-body">
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<pre class="language-bash"><code class="language-bash code-highlight"><span class="code-line"><span class="token parameter variable">-aq</span> QUALITY <span class="token comment"># 音频质量（特定于编解码器）</span>
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</span><span class="code-line"><span class="token parameter variable">-ar</span> <span class="token number">44100</span> <span class="token comment"># 音频采样率 (Hz)</span>
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</span><span class="code-line"><span class="token parameter variable">-ac</span> <span class="token number">1</span> <span class="token comment"># 音频通道（1=单声道，2=立体声）</span>
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</span><span class="code-line"><span class="token parameter variable">-an</span> <span class="token comment"># 没有音频</span>
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</span><span class="code-line"><span class="token parameter variable">-vol</span> N <span class="token comment"># 音量（256=正常）</span>
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</span></code></pre>
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</div></div></div><div class="wrap h3body-exist"><div class="wrap-header h3wrap"><h3 id="比特率"><a aria-hidden="true" tabindex="-1" href="#比特率"><span class="icon icon-link"></span></a>比特率</h3><div class="wrap-body">
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<pre class="language-bash"><code class="language-bash code-highlight"><span class="code-line"><span class="token parameter variable">-b:v</span> 1M <span class="token comment"># 视频比特率（1M = 1Mbit/s）</span>
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</span><span class="code-line"><span class="token parameter variable">-b:a</span> 1M <span class="token comment"># 音频比特率</span>
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</span></code></pre>
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</div></div><div class="h3wrap-body"><h4 id="视频"><a aria-hidden="true" tabindex="-1" href="#视频"><span class="icon icon-link"></span></a>视频</h4>
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<pre class="language-bash"><code class="language-bash code-highlight"><span class="code-line"><span class="token parameter variable">-aspect</span> RATIO <span class="token comment"># 纵横比（4:3、16:9 或 1.25）</span>
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</span><span class="code-line"><span class="token parameter variable">-r</span> RATE <span class="token comment"># 每秒帧率</span>
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</span><span class="code-line"><span class="token parameter variable">-s</span> WIDTHxHEIGHT <span class="token comment"># 帧大小</span>
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</span><span class="code-line"><span class="token parameter variable">-vn</span> <span class="token comment"># 没有视频</span>
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</span></code></pre>
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</div></div></div></div><div class="wrap h2body-exist"><div class="wrap-header h2wrap"><h2 id="视频编辑"><a aria-hidden="true" tabindex="-1" href="#视频编辑"><span class="icon icon-link"></span></a>视频编辑</h2><div class="wrap-body">
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<!--rehype:body-class=cols-2-->
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</div></div><div class="h2wrap-body cols-2"><div class="wrap h3body-not-exist row-span-2"><div class="wrap-header h3wrap"><h3 id="裁剪"><a aria-hidden="true" tabindex="-1" href="#裁剪"><span class="icon icon-link"></span></a>裁剪</h3><div class="wrap-body">
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<!--rehype:wrap-class=row-span-2-->
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<pre class="wrap-text "><code class="language-bash code-highlight"><span class="code-line">$ ffmpeg <span class="token parameter variable">-i</span> <span class="token operator"><</span>input<span class="token operator">></span> <span class="token parameter variable">-filter:v</span> <span class="token string">"crop=640:480:100:25"</span> <span class="token operator"><</span>output<span class="token operator">></span>
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</span></code></pre>
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<!--rehype:className=wrap-text -->
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<p>通过从输入视频中复制偏移 <code>x=100px</code> <code>y=25px</code> 的相应窗口来创建 <code>640x480</code> 大小的输出视频</p>
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<pre class="wrap-text "><code class="language-bash code-highlight"><span class="code-line"><span class="token comment"># 裁剪到宽度 360，高度 640</span>
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</span><span class="code-line">$ ffmpeg <span class="token parameter variable">-i</span> input.mov <span class="token parameter variable">-filter:v</span> <span class="token string">'crop=360:640:0:0'</span> <span class="token parameter variable">-codec:a</span> copy output.mov
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</span></code></pre>
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<!--rehype:className=wrap-text -->
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<p>裁剪到宽度 360，高度 640，从坐标 (10, 20) 开始</p>
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<pre class="wrap-text "><code class="language-bash code-highlight"><span class="code-line">$ ffmpeg <span class="token parameter variable">-i</span> input.mov <span class="token parameter variable">-filter:v</span> <span class="token string">'crop=360:640:10:20'</span> <span class="token parameter variable">-codec:a</span> copy output.mov
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</span></code></pre>
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<!--rehype:className=wrap-text -->
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</div></div></div><div class="wrap h3body-not-exist"><div class="wrap-header h3wrap"><h3 id="缩放"><a aria-hidden="true" tabindex="-1" href="#缩放"><span class="icon icon-link"></span></a>缩放</h3><div class="wrap-body">
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<pre class="wrap-text "><code class="language-bash code-highlight"><span class="code-line">$ ffmpeg <span class="token parameter variable">-i</span> <span class="token operator"><</span>输入<span class="token operator">></span> <span class="token parameter variable">-vf</span> <span class="token assign-left variable">scale</span><span class="token operator">=</span><span class="token number">640</span>:480 <span class="token operator"><</span>输出<span class="token operator">></span>
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</span></code></pre>
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<!--rehype:className=wrap-text -->
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</div></div></div><div class="wrap h3body-not-exist"><div class="wrap-header h3wrap"><h3 id="视频帧速率"><a aria-hidden="true" tabindex="-1" href="#视频帧速率"><span class="icon icon-link"></span></a>视频帧速率</h3><div class="wrap-body">
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<pre class="language-bash"><code class="language-bash code-highlight"><span class="code-line">$ ffmpeg <span class="token parameter variable">-i</span> input.avi <span class="token parameter variable">-r</span> <span class="token number">24</span> output.avi
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</span></code></pre>
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<p>将输出文件的帧速率强制为 24 fps</p>
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<pre class="language-bash"><code class="language-bash code-highlight"><span class="code-line">$ ffmpeg <span class="token parameter variable">-r</span> <span class="token number">1</span> <span class="token parameter variable">-i</span> input.m2v <span class="token parameter variable">-r</span> <span class="token number">24</span> output.avi
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</span></code></pre>
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<p>将输入文件的帧速率（仅对原始格式有效）强制为 1 fps，将输出文件的帧速率强制为 24 fps</p>
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</div></div></div><div class="wrap h3body-not-exist col-span-2"><div class="wrap-header h3wrap"><h3 id="剪切视频部分"><a aria-hidden="true" tabindex="-1" href="#剪切视频部分"><span class="icon icon-link"></span></a>剪切视频部分</h3><div class="wrap-body">
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<!--rehype:wrap-class=col-span-2-->
|
||
<pre class="wrap-text "><code class="language-bash code-highlight"><span class="code-line">$ ffmpeg <span class="token parameter variable">-i</span> <span class="token operator"><</span>input<span class="token operator">></span> <span class="token parameter variable">-ss</span> 00:01:45 <span class="token parameter variable">-t</span> 00:02:35 <span class="token parameter variable">-vcodec</span> copy <span class="token parameter variable">-acodec</span> copy <span class="token operator"><</span>output<span class="token operator">></span>
|
||
</span><span class="code-line">$ ffmpeg <span class="token parameter variable">-ss</span> 00:00:30 <span class="token parameter variable">-i</span> orginalfile.mpg <span class="token parameter variable">-t</span> 00:00:05 <span class="token parameter variable">-vcodec</span> copy <span class="token parameter variable">-acodec</span> copy newfile.mpg
|
||
</span><span class="code-line"><span class="token comment"># 从 4.5 秒开始的 5 秒长的视频</span>
|
||
</span><span class="code-line">$ ffmpeg <span class="token parameter variable">-i</span> in.mp4 <span class="token parameter variable">-ss</span> <span class="token number">4.5</span> <span class="token parameter variable">-t</span> <span class="token number">5</span> out.mp4
|
||
</span></code></pre>
|
||
<!--rehype:className=wrap-text -->
|
||
</div></div></div><div class="wrap h3body-not-exist row-span-2"><div class="wrap-header h3wrap"><h3 id="h265-2-pass-编码"><a aria-hidden="true" tabindex="-1" href="#h265-2-pass-编码"><span class="icon icon-link"></span></a>H265 2-pass 编码</h3><div class="wrap-body">
|
||
<!--rehype:wrap-class=row-span-2-->
|
||
<pre class="wrap-text "><code class="language-bash code-highlight"><span class="code-line">$ ffmpeg <span class="token parameter variable">-y</span> <span class="token parameter variable">-i</span> <span class="token operator"><</span>input<span class="token operator">></span> <span class="token parameter variable">-c:v</span> libx265 <span class="token parameter variable">-b:v</span> 2600k <span class="token punctuation">\</span>
|
||
</span><span class="code-line"> -x265-params <span class="token assign-left variable">pass</span><span class="token operator">=</span><span class="token number">1</span> <span class="token punctuation">\</span>
|
||
</span><span class="code-line"> <span class="token parameter variable">-an</span> <span class="token parameter variable">-f</span> mp4 /dev/null <span class="token operator">&&</span> <span class="token punctuation">\</span>
|
||
</span><span class="code-line"> ffmpeg <span class="token parameter variable">-i</span> <span class="token operator"><</span>input<span class="token operator">></span> <span class="token punctuation">\</span>
|
||
</span><span class="code-line"> <span class="token parameter variable">-c:v</span> libx265 <span class="token parameter variable">-b:v</span> 2600k <span class="token punctuation">\</span>
|
||
</span><span class="code-line"> -x265-params <span class="token assign-left variable">pass</span><span class="token operator">=</span><span class="token number">2</span> <span class="token punctuation">\</span>
|
||
</span><span class="code-line"> <span class="token parameter variable">-c:a</span> aac <span class="token parameter variable">-b:a</span> 128k output.mp4
|
||
</span></code></pre>
|
||
<!--rehype:className=wrap-text -->
|
||
<p>对于 <code>H265 2-pass</code> 编码，您需要组合 <code>2</code> 个 <code>ffmpeg</code> 调用</p>
|
||
</div></div></div><div class="wrap h3body-not-exist"><div class="wrap-header h3wrap"><h3 id="视频比特率设置"><a aria-hidden="true" tabindex="-1" href="#视频比特率设置"><span class="icon icon-link"></span></a>视频比特率设置</h3><div class="wrap-body">
|
||
<pre class="language-bash"><code class="language-bash code-highlight"><span class="code-line">$ ffmpeg <span class="token parameter variable">-i</span> input.avi <span class="token parameter variable">-b:v</span> 64k <span class="token parameter variable">-bufsize</span> 64k output.avi
|
||
</span></code></pre>
|
||
<p>将输出文件的视频比特率设置为 64 kbit/s</p>
|
||
</div></div></div><div class="wrap h3body-not-exist"><div class="wrap-header h3wrap"><h3 id="固定旋转"><a aria-hidden="true" tabindex="-1" href="#固定旋转"><span class="icon icon-link"></span></a>固定旋转</h3><div class="wrap-body">
|
||
<pre class="wrap-text "><code class="language-bash code-highlight"><span class="code-line">$ ffmpeg <span class="token parameter variable">-i</span> <span class="token operator"><</span>input<span class="token operator">></span> <span class="token parameter variable">-c</span> copy -metadata:s:v:0 <span class="token assign-left variable">rotate</span><span class="token operator">=</span><span class="token number">90</span> <span class="token operator"><</span>output<span class="token operator">></span>
|
||
</span></code></pre>
|
||
<!--rehype:className=wrap-text -->
|
||
<p>不要为旋转重新编码，而是简单地为旋转角度添加一个视频元数据字段</p>
|
||
</div></div></div><div class="wrap h3body-not-exist"><div class="wrap-header h3wrap"><h3 id="放慢视频速度"><a aria-hidden="true" tabindex="-1" href="#放慢视频速度"><span class="icon icon-link"></span></a>放慢视频速度</h3><div class="wrap-body">
|
||
<pre class="language-bash"><code class="language-bash code-highlight"><span class="code-line">$ ffmpeg <span class="token parameter variable">-i</span> in.mp4 <span class="token parameter variable">-filter:v</span> <span class="token string">"setpts=4.0*PTS"</span> out.mp4
|
||
</span></code></pre>
|
||
<p>使用过滤器减慢视频。 此示例将视频减慢四倍</p>
|
||
</div></div></div><div class="wrap h3body-not-exist"><div class="wrap-header h3wrap"><h3 id="缩放到特定宽度"><a aria-hidden="true" tabindex="-1" href="#缩放到特定宽度"><span class="icon icon-link"></span></a>缩放到特定宽度</h3><div class="wrap-body">
|
||
<pre class="language-bash"><code class="language-bash code-highlight"><span class="code-line">$ ffmpeg <span class="token parameter variable">-i</span> in.mp4 <span class="token parameter variable">-filter:v</span> <span class="token assign-left variable">scale</span><span class="token operator">=</span><span class="token string">"538:trunc(ow/a/2)*2"</span> <span class="token parameter variable">-c:a</span> copy out.mp4
|
||
</span></code></pre>
|
||
<p>给定所需的视频宽度，例如 538 像素，您可以使用以下方法将视频调整为该宽度，同时保持宽高比</p>
|
||
</div></div></div></div></div><div class="wrap h2body-exist"><div class="wrap-header h2wrap"><h2 id="重新包装"><a aria-hidden="true" tabindex="-1" href="#重新包装"><span class="icon icon-link"></span></a>重新包装</h2><div class="wrap-body">
|
||
</div></div><div class="h2wrap-body"><div class="wrap h3body-not-exist"><div class="wrap-header h3wrap"><h3 id="提取音频流"><a aria-hidden="true" tabindex="-1" href="#提取音频流"><span class="icon icon-link"></span></a>提取音频流</h3><div class="wrap-body">
|
||
<pre class="wrap-text "><code class="language-bash code-highlight"><span class="code-line">$ ffmpeg <span class="token parameter variable">-i</span> file.mp4 <span class="token parameter variable">-vn</span> <span class="token parameter variable">-acodec</span> copy output.aac
|
||
</span></code></pre>
|
||
<!--rehype:className=wrap-text -->
|
||
<p>将<code>-vn</code>（无视频）与 <code>-acodec copy</code> 结合起来。请注意，输出文件扩展名必须与输入文件中的音频编解码器匹配，<code>-acodec copy</code> 才能工作。</p>
|
||
</div></div></div><div class="wrap h3body-not-exist row-span-2"><div class="wrap-header h3wrap"><h3 id="创建缩略图"><a aria-hidden="true" tabindex="-1" href="#创建缩略图"><span class="icon icon-link"></span></a>创建缩略图</h3><div class="wrap-body">
|
||
<!--rehype:wrap-class=row-span-2-->
|
||
<p>在 10 秒时创建一个缩略图</p>
|
||
<pre class="wrap-text "><code class="language-bash code-highlight"><span class="code-line">$ ffmpeg <span class="token parameter variable">-ss</span> <span class="token number">10</span> <span class="token parameter variable">-i</span> <span class="token operator"><</span>input file<span class="token operator">></span> <span class="token parameter variable">-vframes</span> <span class="token number">1</span> <span class="token parameter variable">-vcodec</span> png <span class="token parameter variable">-an</span> thumb.png
|
||
</span></code></pre>
|
||
<!--rehype:className=wrap-text -->
|
||
<p>例如，要每 <code>n</code> 秒创建一次缩略图，请使用 <code>-vf fps=1/n</code></p>
|
||
<pre class="wrap-text "><code class="language-bash code-highlight"><span class="code-line">$ ffmpeg <span class="token parameter variable">-i</span> <span class="token operator"><</span>input file<span class="token operator">></span> <span class="token parameter variable">-vf</span> <span class="token assign-left variable">fps</span><span class="token operator">=</span><span class="token number">1</span>/60 thumbnails/thumb%03d.png
|
||
</span></code></pre>
|
||
<!--rehype:className=wrap-text -->
|
||
</div></div></div><div class="wrap h3body-not-exist row-span-2"><div class="wrap-header h3wrap"><h3 id="处理-id3-标签"><a aria-hidden="true" tabindex="-1" href="#处理-id3-标签"><span class="icon icon-link"></span></a>处理 id3 标签</h3><div class="wrap-body">
|
||
<!--rehype:wrap-class=row-span-2-->
|
||
<p>提取</p>
|
||
<pre class="wrap-text "><code class="language-bash code-highlight"><span class="code-line">$ ffmpeg <span class="token parameter variable">-i</span> file.mp3 <span class="token parameter variable">-f</span> ffmetadata metadata.txt
|
||
</span></code></pre>
|
||
<!--rehype:className=wrap-text -->
|
||
<p>设置</p>
|
||
<pre class="wrap-text "><code class="language-bash code-highlight"><span class="code-line">$ ffmpeg <span class="token parameter variable">-i</span> file.mp3 <span class="token parameter variable">-acodec</span> copy <span class="token parameter variable">-metadata</span> <span class="token assign-left variable">title</span><span class="token operator">=</span><span class="token string">"<title>"</span> <span class="token parameter variable">-metadata</span> <span class="token assign-left variable">artist</span><span class="token operator">=</span><span class="token string">"<artist>"</span> <span class="token parameter variable">-metadata</span> <span class="token assign-left variable">album</span><span class="token operator">=</span><span class="token string">"<album>"</span> out.mp3
|
||
</span></code></pre>
|
||
<!--rehype:className=wrap-text -->
|
||
<p>更多<a href="https://gist.github.com/eyecatchup/0757b3d8b989fe433979db2ea7d95a01">请查看</a></p>
|
||
</div></div></div><div class="wrap h3body-not-exist"><div class="wrap-header h3wrap"><h3 id="重新采样转换音频"><a aria-hidden="true" tabindex="-1" href="#重新采样转换音频"><span class="icon icon-link"></span></a>重新采样/转换音频</h3><div class="wrap-body">
|
||
<pre class="wrap-text "><code class="language-bash code-highlight"><span class="code-line">$ ffmpeg <span class="token parameter variable">-i</span> file.aac <span class="token parameter variable">-acodec</span> mp3 <span class="token parameter variable">-ar</span> <span class="token number">44100</span> <span class="token parameter variable">-ab</span> <span class="token number">128000</span> output.mp3
|
||
</span></code></pre>
|
||
<!--rehype:className=wrap-text -->
|
||
</div></div></div><div class="wrap h3body-not-exist row-span-2"><div class="wrap-header h3wrap"><h3 id="切换容器转换类型"><a aria-hidden="true" tabindex="-1" href="#切换容器转换类型"><span class="icon icon-link"></span></a>切换容器(转换类型)</h3><div class="wrap-body">
|
||
<!--rehype:wrap-class=row-span-2-->
|
||
<p>将容器从 <code>MKV</code> 更改为 <code>MP4</code></p>
|
||
<pre class="wrap-text "><code class="language-bash code-highlight"><span class="code-line">$ ffmpeg <span class="token parameter variable">-i</span> file.mkv <span class="token parameter variable">-acodec</span> copy <span class="token parameter variable">-vcodec</span> copy file.mp4
|
||
</span></code></pre>
|
||
<!--rehype:className=wrap-text -->
|
||
<p>要将视频从 <code>.mov</code> 更改为 <code>.mp4</code></p>
|
||
<pre class="language-bash"><code class="language-bash code-highlight"><span class="code-line">$ ffmpeg <span class="token parameter variable">-i</span> in.mov out.mp4
|
||
</span></code></pre>
|
||
</div></div></div><div class="wrap h3body-not-exist row-span-2"><div class="wrap-header h3wrap"><h3 id="音视频同步"><a aria-hidden="true" tabindex="-1" href="#音视频同步"><span class="icon icon-link"></span></a>音视频同步</h3><div class="wrap-body">
|
||
<!--rehype:wrap-class=row-span-2-->
|
||
<p>将音频延迟 3 秒</p>
|
||
<pre class="wrap-text "><code class="language-bash code-highlight"><span class="code-line">$ ffmpeg <span class="token parameter variable">-i</span> input.mov <span class="token parameter variable">-itsoffset</span> <span class="token number">3</span> <span class="token parameter variable">-i</span> input.mov <span class="token parameter variable">-map</span> <span class="token number">0</span>:v <span class="token parameter variable">-map</span> <span class="token number">1</span>:a <span class="token parameter variable">-codec:a</span> copy <span class="token parameter variable">-codec:v</span> copy output.mov
|
||
</span></code></pre>
|
||
<!--rehype:className=wrap-text -->
|
||
<p>将视频延迟 3 秒（即将音频提前 3 秒）</p>
|
||
<pre class="wrap-text "><code class="language-bash code-highlight"><span class="code-line">$ ffmpeg <span class="token parameter variable">-i</span> input.mov <span class="token parameter variable">-itsoffset</span> <span class="token number">3</span> <span class="token parameter variable">-i</span> input.mov <span class="token parameter variable">-map</span> <span class="token number">1</span>:v <span class="token parameter variable">-map</span> <span class="token number">0</span>:a <span class="token parameter variable">-codec:a</span> copy <span class="token parameter variable">-codec:v</span> copy output.mov
|
||
</span></code></pre>
|
||
<!--rehype:className=wrap-text -->
|
||
</div></div></div><div class="wrap h3body-not-exist"><div class="wrap-header h3wrap"><h3 id="图片中的视频"><a aria-hidden="true" tabindex="-1" href="#图片中的视频"><span class="icon icon-link"></span></a>图片中的视频</h3><div class="wrap-body">
|
||
<p>如果您有多个编号的图像 image1.jpg、image2.jpg... 像这样从它们创建一个视频</p>
|
||
<pre class="wrap-text "><code class="language-bash code-highlight"><span class="code-line">$ ffmpeg <span class="token parameter variable">-f</span> image2 <span class="token parameter variable">-i</span> image%d.jpg video.mp4
|
||
</span></code></pre>
|
||
<!--rehype:className=wrap-text -->
|
||
</div></div></div><div class="wrap h3body-not-exist"><div class="wrap-header h3wrap"><h3 id="将视频拆分为图像"><a aria-hidden="true" tabindex="-1" href="#将视频拆分为图像"><span class="icon icon-link"></span></a>将视频拆分为图像</h3><div class="wrap-body">
|
||
<pre class="language-bash"><code class="language-bash code-highlight"><span class="code-line">$ ffmpeg <span class="token parameter variable">-i</span> video.mp4 image%d.jpg
|
||
</span></code></pre>
|
||
</div></div></div><div class="wrap h3body-not-exist col-span-2"><div class="wrap-header h3wrap"><h3 id="转换为-gif"><a aria-hidden="true" tabindex="-1" href="#转换为-gif"><span class="icon icon-link"></span></a>转换为 Gif</h3><div class="wrap-body">
|
||
<!--rehype:wrap-class=col-span-2-->
|
||
<pre class="wrap-text "><code class="language-bash code-highlight"><span class="code-line">$ ffmpeg <span class="token parameter variable">-ss</span> <span class="token number">2</span> <span class="token parameter variable">-t</span> <span class="token number">28</span> <span class="token parameter variable">-i</span> input.mp4 <span class="token parameter variable">-vf</span> <span class="token string">"fps=10,scale=1080:-1:flags=lanczos,split[s0][s1];[s0]palettegen[p];[s1][p]paletteuse"</span> <span class="token parameter variable">-loop</span> <span class="token number">0</span> output.gif
|
||
</span></code></pre>
|
||
<!--rehype:className=wrap-text -->
|
||
<p>上面有关更多信息，请参阅 <a href="https://superuser.com/a/556031">StackOverflow 问题</a></p>
|
||
<pre class="language-bash"><code class="language-bash code-highlight"><span class="code-line"><span class="token comment"># 转换为 GIF</span>
|
||
</span><span class="code-line">$ ffmpeg <span class="token parameter variable">-i</span> input.mov output.gif
|
||
</span><span class="code-line"><span class="token comment"># 从 GIF 转换</span>
|
||
</span><span class="code-line">$ ffmpeg <span class="token parameter variable">-i</span> input.gif output.mov
|
||
</span><span class="code-line"><span class="token comment"># 在非 GIF 格式之间转换</span>
|
||
</span><span class="code-line">$ ffmpeg <span class="token parameter variable">-i</span> input.mov <span class="token parameter variable">-codec:v</span> copy <span class="token parameter variable">-codec:a</span> copy output.mp4
|
||
</span></code></pre>
|
||
</div></div></div><div class="wrap h3body-not-exist"><div class="wrap-header h3wrap"><h3 id="移除音频"><a aria-hidden="true" tabindex="-1" href="#移除音频"><span class="icon icon-link"></span></a>移除音频</h3><div class="wrap-body">
|
||
<pre class="wrap-text "><code class="language-bash code-highlight"><span class="code-line">$ ffmpeg <span class="token parameter variable">-i</span> input.mov <span class="token parameter variable">-codec:v</span> copy <span class="token parameter variable">-an</span> output.mov
|
||
</span></code></pre>
|
||
<!--rehype:className=wrap-text -->
|
||
</div></div></div><div class="wrap h3body-not-exist col-span-2"><div class="wrap-header h3wrap"><h3 id="字幕"><a aria-hidden="true" tabindex="-1" href="#字幕"><span class="icon icon-link"></span></a>字幕</h3><div class="wrap-body">
|
||
<!--rehype:wrap-class=col-span-2-->
|
||
<p>将字幕写入视频</p>
|
||
<pre class="language-bash"><code class="language-bash code-highlight"><span class="code-line">$ ffmpeg <span class="token parameter variable">-i</span> input.mov <span class="token parameter variable">-filter:v</span> <span class="token string">'subtitles=subtitles.srt'</span> <span class="token parameter variable">-codec:a</span> copy output.mov
|
||
</span></code></pre>
|
||
<p>将字幕写入视频，具有自定义字幕样式</p>
|
||
<pre class="language-bash"><code class="language-bash code-highlight"><span class="code-line">$ ffmpeg <span class="token parameter variable">-i</span> input.mov <span class="token parameter variable">-filter:v</span> <span class="token string">"subtitles=subtitles.srt:force_style='FontName=Menlo Bold,Fontsize=18'"</span> <span class="token parameter variable">-codec:a</span> copy output.mov
|
||
</span></code></pre>
|
||
</div></div></div><div class="wrap h3body-not-exist col-span-2"><div class="wrap-header h3wrap"><h3 id="音量"><a aria-hidden="true" tabindex="-1" href="#音量"><span class="icon icon-link"></span></a>音量</h3><div class="wrap-body">
|
||
<!--rehype:wrap-class=col-span-2-->
|
||
<p>将音量减半</p>
|
||
<pre class="language-bash"><code class="language-bash code-highlight"><span class="code-line">$ ffmpeg <span class="token parameter variable">-i</span> input.mov <span class="token parameter variable">-codec:v</span> copy <span class="token parameter variable">-filter:a</span> <span class="token string">'volume=0.5'</span> output.mov
|
||
</span></code></pre>
|
||
<p>音量加倍</p>
|
||
<pre class="language-bash"><code class="language-bash code-highlight"><span class="code-line">$ ffmpeg <span class="token parameter variable">-i</span> input.mov <span class="token parameter variable">-codec:v</span> copy <span class="token parameter variable">-filter:a</span> <span class="token string">'volume=2'</span> output.mov
|
||
</span></code></pre>
|
||
</div></div></div></div></div><div class="wrap h2body-not-exist"><div class="wrap-header h2wrap"><h2 id="另见"><a aria-hidden="true" tabindex="-1" href="#另见"><span class="icon icon-link"></span></a>另见</h2><div class="wrap-body">
|
||
<ul>
|
||
<li><a href="https://ffmpeg.org/">FFmpeg 官网地址</a> <em>(ffmpeg.org)</em></li>
|
||
<li><a href="https://lzone.de/cheat-sheet/ffmpeg">FFmpeg Cheat Sheet</a> <em>(lzone.de)</em></li>
|
||
<li><a href="https://devhints.io/ffmpeg">FFmpeg Cheat Sheet</a> <em>(devhints.io)</em></li>
|
||
<li><a href="https://github.com/yuanqing/ffmpeg-cheatsheet">FFmpeg Cheat Sheet</a> <em>(github.com)</em></li>
|
||
</ul>
|
||
</div></div></div></div></div><footer class="footer-wrap"><footer class="max-container">© 2022 Kenny Wang, All rights reserved.</footer></footer><script>
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||
|
||
function updateAnchor(element) {
|
||
const anchorContainer = document.querySelectorAll('.menu-tocs .menu-modal a.tocs-link');
|
||
anchorContainer.forEach((tocanchor) => {
|
||
tocanchor.classList.remove('is-active-link');
|
||
});
|
||
const anchor = element || document.querySelector(`a.tocs-link[href='${decodeURIComponent(window.location.hash)}']`);
|
||
if (anchor) {
|
||
anchor.classList.add('is-active-link');
|
||
}
|
||
}
|
||
// toc 定位
|
||
updateAnchor()
|
||
const anchor = document.querySelectorAll('.menu-tocs .menu-modal a.tocs-link');
|
||
anchor.forEach((item) => {
|
||
item.addEventListener('click', (e) => {
|
||
updateAnchor()
|
||
})
|
||
})
|
||
</script></body>
|
||
</html>
|