Footnote in Caption of Figure on latex - latex

Question

Although i have tried many code of a footnote in a caption of a figure , it doesn't work , really , where is the problem here
\documentclass[a4paper,12pt]{report}
\usepackage[utf8]{inputenc}
\usepackage{graphicx}
\usepackage{fancyhdr}
\makenomenclature
\usepackage[nottoc]{tocbibind}
\pagenumbering{Roman}
\usepackage{lipsum}
\setcounter{tocdepth}{5}
\setcounter{secnumdepth}{4}
\begin{document}
\begin{figure}
\centering
\includegraphics[width=0.8\textwidth{images/frog.jpg}
\caption[frog]{frog \footnotemark }
\label{fig:pic1}
\end{figure}
\footnotetext{frog}
\end{document}

Answer 1

Two problems:
you can't have the \makenomenclature macro in your code with a package which defines it, e.g. nomencl
the ] after the optional argument of your graphic is missing
With the split between \footnotetext and \footnotemark there is always the risk that the floating figure and the footnote will end up on different pages. You can lessen the risk by using [htbp] as floating specifier for your figure, this way you at least allowed the figure to be placed where the footnote is.
\documentclass[a4paper,12pt]{report}
\usepackage[utf8]{inputenc}
\usepackage{graphicx}
\usepackage{fancyhdr}
%\makenomenclature
\usepackage[nottoc]{tocbibind}
\pagenumbering{Roman}
\usepackage{lipsum}
\setcounter{tocdepth}{5}
\setcounter{secnumdepth}{4}
\begin{document}
\begin{figure}[htpb]
\centering
\includegraphics[width=0.8\textwidth]{example-image-duck}
\caption[frog]{frog \footnotemark }
\label{fig:pic1}
\end{figure}
\footnotetext{frog}
\end{document}