Filter sources do not free memory

[Bernardo]

Summary of the bug: Looks like some filter sources (color, nullsrc, rgbtestsrc, smptebars, testsrc) do not free memory and probably holds all the frames during operation.

Check the attatched image for memory usage during the first command:

$ ffmpeg -f lavfi -i 'nullsrc=s=1280x720' -t 60 dummy.mp4
$ ffplay -f lavfi -i 'testsrc=s=1280x720' -t 60

(ffmpeg version git-2013-03-11-73b40e2)

Using other filter sources, the problem doesn't occur. E.g.:

life=s=1280x720

[Bernardo]

memory usage with filter source

[Hendrik]

Please always test with latest git master, and not builds a month old.
2013-03-11 is already very old, and in fact a related thing was changed on 15th of march.

[Bernardo]

Sorry about that. It was really fixed on some newer commit.