Less likely to change, and under our control.
Thanks-to: Michael Niedermayer
pattern of the other filters.
- ./configure ...
- make -j<whatever> ffmpeg
- - ./ffmpeg -i http://upload.wikimedia.org/wikipedia/en/2/24/Lenna.png -vf foobar foobar.png
+ - ./ffmpeg -i http://samples.ffmpeg.org/image-samples/lena.pnm -vf foobar foobar.png
Note here: you can obviously use a random local image instead of a remote URL.
If everything went right, you should get a foobar.png with Lena edge-detected.