I would like to use pstool with beamer to create a presentation in pdflatex with figures processed by psfrag. However, as the simple example below shows, the figures are processed using the beamer documentclass, so that they each have a full beamer "frame" around them. Is there a way around this?
\documentclass{beamer}
\usepackage{lmodern}
\usepackage{graphicx}
\usepackage[process=all,crop=pdfcrop]{pstool}
\begin{document}
\begin{frame}
\frametitle{Circle}
\begin{figure}
\psfragfig[width=0.3\textwidth]{figures/circle}
{
\psfrag{1}{\(s\)}
}
\end{figure}
\end{frame}
\end{document}

I suspect that if it's possible to override the documentclass used by pstool to process the figures, that would be a solution, but I haven't found how to do this.
Thanks.
