Beamer animate package error

Question

I'm generating an error when I try to run an animation in beamer. I have a set of 100 png files titled 0.png, 1.png, etc. Calling with this code,

\documentclass{beamer}
\usepackage{animate}
\begin{document}
\begin{frame}
\frametitle{a}
    \animategraphics[autoplay,loop]{20}{figs/animBending/}{0}{100}
\end{frame}
\end{document}

I generate the error

libpng error: Not a PNG file

I've tried renaming all my files with extensions .png and .PNG, both give the same error. What's the issue here?

Edit: .log file here

Edit: 0.png here

Welcome to TeX.SX! I can't reproduce the error, it works for me. — Bobyandbob, Mar 15 '18 at 16:52
Interesting. Never tested with files having a zero basename but just numbers. — AlexG, Mar 15 '18 at 16:54
I just tested and with pdflatex from texlive2017 it works fine for me. — samcarter_is_at_topanswers.xyz, Mar 15 '18 at 17:05
Well, I tried a small set of files 0.png, 1.png, 2.png, 3.png residing in a subfolder and had no problems either. Phew!! — AlexG, Mar 15 '18 at 17:05
Libpng obviously complains about your files. Could you try to look at them in some image processing software (e. g. ImageMagick)? — AlexG, Mar 15 '18 at 17:09
@AlexG I don't know much about command line software like that, I do all my TeXing through an IDE and never have to worry about it. Windows lists it as a png file though, and I can open it as such in any windows-based image programs that I try. — avikarto, Mar 15 '18 at 17:14
@avikarto one step back to make sure your images are OK. Does \includegraphics{./figs/animBending/0} and \includegraphics{./figs/animBending/0.png} work? — samcarter_is_at_topanswers.xyz, Mar 15 '18 at 17:18
@samcarter Good call. This also generates the error. It must be that my files are screwed up, as AlexG suggested. — avikarto, Mar 15 '18 at 17:20
@avikarto the image you linked to seems to be a .gif and not a .png — samcarter_is_at_topanswers.xyz, Mar 15 '18 at 17:23
@avikarto see https://tex.stackexchange.com/q/240243/36296 for some suggestions how to convert an animated gif to png — samcarter_is_at_topanswers.xyz, Mar 15 '18 at 17:30
@samcarter Per the post, I used imagemagick to split the gif into pngs, and now the individual image shows with includegraphics (thanks!). However, with animategraphics, still only the first image shows. — avikarto, Mar 15 '18 at 17:40
Scratch that last. The animation plays fine. It simply wasn't showing up in the PDF reader I was using. — avikarto, Mar 15 '18 at 18:54

score 1 · Answer 1 · answered Mar 15 '18 at 17:25

1

The images in question were apparently gif files even though windows recognized them as .png. This was the source of the errors.

answered Mar 15 '18 at 17:25

avikarto

121

1

Therefore: Never suppress showing the file endings in WindosExplorer. There must be a switch somewhere to configure this. – AlexG Mar 15 '18 at 17:26
@AlexG I have windows set to show extensions, and the extensions are .png. The tool I used to convert the images must have simply renamed files .gif->.png instead of converting for real. – avikarto Mar 15 '18 at 17:27

Beamer animate package error

1 Answers1