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I created Ogv -videos with gtk-recordMyDesktop -screecasting program, trying to tackle this problem here with bruteforce over X. You can view the videos with VLC. Now the puzzle is to find some ways to convert Ogv -videos into Gif -animations so I can display them in SE. How can I do that?

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2 Answers 2

take a look at this:

..... After the Desktop Recorder has saved the recording into an OGV video, MPlayer will be used to capture JPEG screenshots, saving them into the 'output' directory.

On a terminal:

mplayer -ao null <video file name> -vo jpeg:outdir=output

Use ImageMagick to convert the screenshots into an animated gifs.

convert output/* output.gif

you can optimize the screenshots this way:

convert output.gif -fuzz 10% -layers Optimize optimised.gif
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For a large number of images, I had to add -limit map 1 to convert (got a "Killed" otherwise). – Ax3l Sep 8 '14 at 15:12
With a 30 second ogv video, the convert command took all my cpu and was going for over 10 minutes before i stopped it. adding -limit map 1 to the command did not fix it. – mac splean Oct 21 at 21:19

echo '# Determine input WxH and FPS' 
eval "$(ffmpeg -i "$ifile" 2>&1 |sed -nr 's/.*Stream.*Video.* ([0-9]+x[0-9]+),.*[^[0-9.]([0-9.]+).*tbr,.*/WxH=\1;FPS=\2/p')"

echo '# Output multiple images from the input video'
ffmpeg -i "$ifile" -r $FPS -s $WxH -f image2 -vframes 100 -y ~/test-%03d.jpg 2>/dev/null

echo '# use ImageMagic "convert" to generate the animated .gif' 
convert -delay 20 ~/test-[0-9][0-9][0-9].jpg  ~/test.gif 

echo '# remove temp image files'    
rm -f  ~/test-[0-9][0-9][0-9].jpg

echo 'Done!'
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Suggest converting to PNG, not JPEG, larger but reduces re-compression artifacts. – ideasman42 Mar 30 '14 at 6:50

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