[Cin] bitstream filtering - does not crash but also not completely work?

I tried to fix our internal bitstream filtering on muxing using this code https://github.com/FFmpeg/FFmpeg/blob/master/libavformat/tee.c it works in sense it stopped crashing and adding simple filter like dump_extra makes file a bit bigger. But complex stuff like cropping or rotation still does not work :-( not sure, may be we need to add those options via av_dict_set too ?