[Libav-user] Seeking for libavfilter functionality: overlay of grid over image, invert colors

[Andrey Utkin]

As letter subject says, i seek for such pieces of functionality.
Looking at filters list in docs i see there are no such filters. But i
am also interested, is there any libraries rich for such and similar
functionality, which are pluggable to libavfilter? Secondly, will
libavfilter major developers agree with inclusion of such filters into
upstream?

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Andrey Utkin