2012/2/17 Maksym Veremeyenko <ve...@m1stereo.tv>: > 16.02.12 18:56, Dan Dennedy написав(ла): > >> 2012/2/16 Maksym Veremeyenko<ve...@m1stereo.tv>: >>> >>> 02.02.12 19:03, Maksym Veremeyenko написав(ла): >>>> >>>> >>>> Hi, >>>> >>>> >>>> i am trying to decrease cpu usage, so i would like to use >>>> PIX_FMT_YUVA420P animation instead of PIX_FMT_BGRA (or other rgb with >>>> alpha channel) but has no luck.. >>>> >>>> video with such pixel format in *nut* container has detected by ffmpeg >>>> properly, but mlt did not use it alpha channel. >>>> >>>> i can provide a sample if required... >>>> >>> >>> alpha been ignored for PIX_FMT_YUVA420P and PIX_FMT_YUVA444P pixel >>> format. >>> moreover current implementation of libswscale drop alpha channel if >>> destination format has no alpha and not planar (even if buffer specified) >>> >>> attached patch extract alpha plane during image decoding. it works almost >>> fine except moments when image fetched from cache (even if *noimagecache* >>> specified). another problem is artifact that appear if last frame in >>> movie >>> is not transparent but producer specifies *out* out of animation. >>> >>> another attempt to fix this was to fix mlt_frame_clone (patch attached) >>> but >>> it has no luck too... >> >> >> OK, thank you for the start of this effort. I will look at it this >> weekend. >> > > attached updated version that works with cache. > > second patch is optional but could be usefull if frame with alpha been > cloned.
These look great, but I had to fix some minor formatting problems. We tend to prefer C++ style comments in .c files (but not headers). Also, some spacing around parenthesis. Sometimes I am OK to make these fixes myself, which I have done here in my local repo. Now I just need to figure out why this does not work: melt -profile atsc_1080i_50 noise: -track ~/Videos/tests/now-main_aut_2011_fullHD.nut -transition composite -- +-DRD-+ ------------------------------------------------------------------------------ Try before you buy = See our experts in action! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-dev2 _______________________________________________ Mlt-devel mailing list Mlt-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mlt-devel
