2009/7/14 Marco Gittler <[email protected]>: > > Am 12.07.2009 um 22:39 schrieb Dan Dennedy: > >> 2009/7/11 Marco Gittler <[email protected]>: >>> >>> Am 10.07.2009 um 23:53 schrieb Dan Dennedy: >>> >>>> 2009/7/10 Marco Gittler <[email protected]>: >>>>> >>>>> @dan th title should be created with alpha channel. >>>>> how can i test in melt to overlay this title over a video ? >>>> >>>> Please make sure that your new producer only produces mlt_image_rgb24a >>>> and indicates it. Do not worry about conversion to mlt_image_yuv422 >>>> anymore. >>>> >>>>> melt kdenlivetitle:try.kdenlivetitle -track video.avi -attach >>>>> transition:mix >>>>> -> does not work :( >>>> >>>> add "*.kdenlivetitle=kdenlivetitle" to core/loader.dict >>>> >>>> melt video.avi -filter watermark:try.kdenlivetitle >>>> composite.progressive=1 >>> >>> nice, this works for pixbuf pictures. but with the kdenlivetitle :no >>> overlay >>> as standalone prodcuer the titleplayer works very well. >>> >>> does mlt_image_rgb24a, also include (like the name seems to say) the >>> alpha >>> channel ? >> >> Yes. >> >>> it seems the alpha will not be set. >> >> If you return mlt_image_rgb24a and do not include the alpha channel >> byte per pixel, then the image will skewed because downstream >> functions expect 4 bytes per pixel. Producer qimage supports this, but >> it must convert ARGB to RGBA. Maybe something in the way you render is >> writing alpha channel byte as 0xff. > > the image created i now rgb24a and includes real alpha data. > playing the kdenlivetitle alone plays correct. > but as overlay (watermark) with other producers will not show anything. > > tested with producer_qimage (works in both cases). > any idea what can go wrong ? (the producer_get_image is not large, but i > can't see any error )
Try this. Do not allocate QImage using the existing buffer. Let it create its own and return that from Title::drawKdenliveTitle. Then, copy from QImage to the MLT image buffer the same way that qimage_wrapper.cpp does - using qRed()..qAlpha(). -- +-DRD-+ ------------------------------------------------------------------------------ Enter the BlackBerry Developer Challenge This is your chance to win up to $100,000 in prizes! For a limited time, vendors submitting new applications to BlackBerry App World(TM) will have the opportunity to enter the BlackBerry Developer Challenge. See full prize details at: http://p.sf.net/sfu/Challenge _______________________________________________ Kdenlive-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/kdenlive-devel
