in gui test, remove useless ffmpegcolorspace and capsfilter in source
in gui test, remove useless ffmpegcolorspace and capsfilter in source

tieto/farstream,ahmedammar/skype_farsight2,kakaroto/farstream,tieto/farstream,kakaroto/farstream,pexip/farstream,kakaroto/farstream,shadeslayer/farstream,tieto/farstream,kakaroto/farstream,pexip/farstream,ahmedammar/skype_farsight2,ahmedammar/skype_farsight2,pexip/farstream,shadeslayer/farstream,tieto/farstream,tieto/farstream,ahmedammar/skype_farsight2,shadeslayer/farstream,pexip/farstream,shadeslayer/farstream