How do I detect an animated GIF's ticks per second?

I'm looking for a way to detect the (average) frame rate of an animated GIF using Linux. PHP's I开发者_JAVA技巧magick class seems to provide this functionality but I rather avoid installing a ton of libraries to get it to work.

http://www.php.net/manual/en/function.imagick-getimagetickspersecond.php

Is there a simple way to do this?

---

I think ImageMagick really is your best bet.

This is what a identify filename.gif on an animated GIF looks like:

gif.gif[1] GIF 350x350 350x350+0+0 8-bit PseudoClass 256c 145KB 0.000u 0:00.003
gif.gif[2] GIF 350x350 350x350+0+0 8-bit PseudoClass 256c 145KB 0.000u 0:00.006
gif.gif[3] GIF 350x350 350x350+0+0 8-bit PseudoClass 256c 145KB 0.000u 0:00.010

this doesn't give you the frame rate - which is good, because animated GIFs don't have a global frame rate, they have an individual one between frames.

---

You can customize the info format of what ImageMagick's identify should display to you:

identify \
      -format "%T ticks:  %f: Frame[%s]  %m %wx%h %P%O %r %z-bit\n" \
       anim.gif

That should do the trick.

Example output:

 50 ticks:  anim.gif: Frame[0]  GIF 128x128 128x128+0+0 PseudoClass sRGB Matte 8-bit
 10 ticks:  anim.gif: Frame[1]  GIF 128x128 128x128+0+0 PseudoClass sRGB Matte 8-bit
 10 ticks:  anim.gif: Frame[2]  GIF 128x128 128x128+0+0 PseudoClass sRGB Matte 8-bit
 10 ticks:  anim.gif: Frame[3]  GIF 128x128 128x128+0+0 PseudoClass sRGB Matte 8-bit
 10 ticks:  anim.gif: Frame[4]  GIF 128x128 128x128+0+0 PseudoClass sRGB Matte 8-bit
 50 ticks:  anim.gif: Frame[5]  GIF 128x128 128x128+0+0 PseudoClass sRGB Matte 8-bit
 10 ticks:  anim.gif: Frame[6]  GIF 1x1 128x128+0+0 PseudoClass sRGB Matte 8-bit
 10 ticks:  anim.gif: Frame[7]  GIF 128x128 128x128+0+0 PseudoClass sRGB Matte 8-bit
 10 ticks:  anim.gif: Frame[8]  GIF 128x128 128x128+0+0 PseudoClass sRGB Matte 8-bit
 10 ticks:  anim.gif: Frame[9]  GIF 128x128 128x128+0+0 PseudoClass sRGB Matte 8-bit
 10 ticks:  anim.gif: Frame[10]  GIF 128x128 128x128+0+0 PseudoClass sRGB Matte 8-bit