after changing a lot, the copy of image/alpha works now.(QApplication cannot be run vom ...init (), else nothing will be seen in the buffer anymore, when overlaying)
the read/draw code is copied from kdenlive. if i set manualy the alpha value to 255, it works like expected.let QGraphicsScene render the scene, will result in very low alpha values (nearly nothing to see,
in contrast to the same routine in kdenlive, which shows the colors ) so the rest is now a Qt-based thing. maybe a second tester may give some remarks to this. regards marco Am 14.07.2009 um 23:24 schrieb Dan Dennedy:
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_yuv422anymore.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=1nice, this works for pixbuf pictures. but with the kdenlivetitle :nooverlay as standalone prodcuer the titleplayer works very well.does mlt_image_rgb24a, also include (like the name seems to say) thealpha 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 downstreamfunctions expect 4 bytes per pixel. Producer qimage supports this, but it must convert ARGB to RGBA. Maybe something in the way you render iswriting 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 ican'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 ChallengeThis 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 prizedetails at: http://p.sf.net/sfu/Challenge _______________________________________________ Kdenlive-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/kdenlive-devel
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