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doc: update flask.md #223 89fddf6b6f

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@ -594,7 +594,8 @@ FFmpeg 参考，为开发人员分享快速参考备忘单。">
</span></code></pre>
<!--rehype:className=wrap-text -->
</div></div></div></div></div><div class="wrap h2body-exist"><div class="wrap-header h2wrap"><h2 id="视频过滤器"><a aria-hidden="true" tabindex="-1" href="#视频过滤器"><span class="icon icon-link"></span></a>视频过滤器</h2><div class="wrap-body">
</div></div><div class="h2wrap-body"><div class="wrap h3body-not-exist"><div class="wrap-header h3wrap"><h3 id="格式"><a aria-hidden="true" tabindex="-1" href="#格式"><span class="icon icon-link"></span></a>格式</h3><div class="wrap-body">
<!--rehype:body-class=cols-2-->
</div></div><div class="h2wrap-body cols-2"><div class="wrap h3body-not-exist"><div class="wrap-header h3wrap"><h3 id="格式"><a aria-hidden="true" tabindex="-1" href="#格式"><span class="icon icon-link"></span></a>格式</h3><div class="wrap-body">
<p>如果一个 fliter 有多个参数，需要使用 <code>,</code> 分隔</p>
<pre class="language-bash"><code class="language-bash code-highlight"><span class="code-line">$ ffmpeg <span class="token parameter variable">-i</span> test.avi <span class="token parameter variable">-c:v</span> libx264 <span class="token parameter variable">-vf</span> <span class="token string">"scale=1024:-1,transpose=1,crop=iw/3:ih/3"</span> output.mp4
</span></code></pre>
@ -624,8 +625,7 @@ FFmpeg 参考，为开发人员分享快速参考备忘单。">
</span><span class="code-line">ffmpeg <span class="token parameter variable">-i</span> <span class="token number">1</span>.mp4 <span class="token parameter variable">-b:v</span> 548k <span class="token parameter variable">-vf</span> <span class="token assign-left variable">delogo</span><span class="token operator">=</span>x<span class="token operator">=</span><span class="token number">10</span>:y<span class="token operator">=</span><span class="token number">10</span>:w<span class="token operator">=</span><span class="token number">120</span>:h<span class="token operator">=</span><span class="token number">45</span>:show<span class="token operator">=</span><span class="token number">1</span> output.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="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-->
</div></div></div><div class="wrap h3body-not-exist"><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">
<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">&#x3C;</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>
@ -659,7 +659,8 @@ FFmpeg 参考，为开发人员分享快速参考备忘单。">
</span><span class="code-line"> <span class="token parameter variable">-t</span> <span class="token number">10</span> out.mp4
</span></code></pre>
</div></div></div></div></div><div class="wrap h2body-exist"><div class="wrap-header h2wrap"><h2 id="音频过滤器"><a aria-hidden="true" tabindex="-1" href="#音频过滤器"><span class="icon icon-link"></span></a>音频过滤器</h2><div class="wrap-body">
</div></div><div class="h2wrap-body"><div class="wrap h3body-not-exist"><div class="wrap-header h3wrap"><h3 id="调节音量"><a aria-hidden="true" tabindex="-1" href="#调节音量"><span class="icon icon-link"></span></a>调节音量</h3><div class="wrap-body">
<!--rehype:body-class=cols-2-->
</div></div><div class="h2wrap-body cols-2"><div class="wrap h3body-not-exist"><div class="wrap-header h3wrap"><h3 id="调节音量"><a aria-hidden="true" tabindex="-1" href="#调节音量"><span class="icon icon-link"></span></a>调节音量</h3><div class="wrap-body">
<pre class="language-bash"><code class="language-bash code-highlight"><span class="code-line"><span class="token comment"># 增大音量</span>
</span><span class="code-line">$ ffmpeg <span class="token parameter variable">-i</span> test.mp4 <span class="token parameter variable">-af</span> <span class="token string">"volumn=1.5"</span> out.mp4
</span></code></pre>
@ -678,7 +679,8 @@ FFmpeg 参考，为开发人员分享快速参考备忘单。">
</span><span class="code-line">$ ffmpeg <span class="token parameter variable">-i</span> input.mp3 <span class="token parameter variable">-af</span> <span class="token string">"channelmap=1-0|1-1"</span> output.mp3
</span></code></pre>
</div></div></div></div></div><div class="wrap h2body-exist"><div class="wrap-header h2wrap"><h2 id="流处理"><a aria-hidden="true" tabindex="-1" href="#流处理"><span class="icon icon-link"></span></a>流处理</h2><div class="wrap-body">
</div></div><div class="h2wrap-body"><div class="wrap h3body-not-exist"><div class="wrap-header h3wrap"><h3 id="拉流"><a aria-hidden="true" tabindex="-1" href="#拉流"><span class="icon icon-link"></span></a>拉流</h3><div class="wrap-body">
<!--rehype:body-class=cols-2-->
</div></div><div class="h2wrap-body cols-2"><div class="wrap h3body-not-exist"><div class="wrap-header h3wrap"><h3 id="拉流"><a aria-hidden="true" tabindex="-1" href="#拉流"><span class="icon icon-link"></span></a>拉流</h3><div class="wrap-body">
<pre class="language-bash"><code class="language-bash code-highlight"><span class="code-line"><span class="token comment"># 拉取rtmp流并存储到本地</span>
</span><span class="code-line">$ ffmpeg <span class="token parameter variable">-i</span> <span class="token string">"rtsp://127.0.0.1/test"</span> test.mp4
</span></code></pre>
@ -686,7 +688,8 @@ FFmpeg 参考，为开发人员分享快速参考备忘单。">
<pre class="language-bash"><code class="language-bash code-highlight"><span class="code-line"><span class="token comment"># 推送test.mp4到远程</span>
</span><span class="code-line">$ ffmpeg <span class="token parameter variable">-re</span> <span class="token parameter variable">-i</span> test.mp4 <span class="token parameter variable">-f</span> flv rtmp://127.0.0.1/test
</span></code></pre>
</div></div></div><div class="wrap h3body-not-exist"><div class="wrap-header h3wrap"><h3 id="转发"><a aria-hidden="true" tabindex="-1" href="#转发"><span class="icon icon-link"></span></a>转发</h3><div class="wrap-body">
</div></div></div><div class="wrap h3body-not-exist col-span-2"><div class="wrap-header h3wrap"><h3 id="转发"><a aria-hidden="true" tabindex="-1" href="#转发"><span class="icon icon-link"></span></a>转发</h3><div class="wrap-body">
<!--rehype:wrap-class=col-span-2-->
<pre class="language-bash"><code class="language-bash code-highlight"><span class="code-line"><span class="token comment"># 拉取流并转发</span>
</span><span class="code-line">$ ffmpeg <span class="token parameter variable">-i</span> <span class="token string">"rtsp://127.0.0.1/test"</span> <span class="token parameter variable">-f</span> mpegts <span class="token parameter variable">-codec:v</span> mpeg1video http://127.0.0.1/demo
</span></code></pre>