 class="fu">fps</span><span class="op">(</span><span class="va">x</span><span class="op">)</span></span>
<span></span>
<span><span class="co"># S3 method for class 'VideoStack'</span></span>
<span><span class="fu">fps</span><span class="op">(</span><span class="va">x</span><span class="op">)</span></span>
<span></span>
<span><span class="co"># S3 method for class 'Rcpp_VideoWriter'</span></span>
<span><span class="fu">fps</span><span class="op">(</span><span class="va">x</span><span class="op">)</span></spa