mjhjmtu

I created OGV videos with the gtk-recordmydesktop screencasting program, trying to tackle this problem here with bruteforce over X. I can view the videos with VLC.

Now, the task is to find some ways to convert OGV videos into GIF animations so I can display them on SE. How can I do that?

take a look at this: https://askubuntu.com/questions/107726/how-to-create-animated-gif-images-of-a-screencast/107735#107735

..... 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

Simple script with good quality

Script:

inputFile=$1

FPS=15
WIDTH=320

#Generate palette for better quality
ffmpeg -i $inputFile -vf fps=$FPS,scale=$WIDTH:-1:flags=lanczos,palettegen tmp_palette.png

#Generate gif using palette
ffmpeg -i $inputFile -i tmp_palette.png -loop 0 -filter_complex "fps=$FPS,scale=$WIDTH:-1:flags=lanczos[x];[x][1:v]paletteuse" output.gif

rm tmp_palette.png

Code from: https://superuser.com/a/556031/295664

Without palette: (231 KB)

With palette:(573 KB)

This one-liner is working for me:

ffmpeg -i video.ogv video.gif

ifile=~/test.ogv

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!'