On date Tuesday 2009-12-01 00:57:59 +0100, Stefano Sabatini encoded: > On date Tuesday 2009-12-01 00:50:50 +0100, Vitor Sessak encoded: > > Artur Bodera wrote: > >> For those that have given up on ffmpeg and +libavfilter -vhook debacle. > >> > >> Here's a "just add water" solution to all your trouble: transparent PNG's > >> and watermarks in recent ffmpeg compilations. > >> > >> I'm attaching a working patch that will enable alpha-transparency in > >> overlay > >> filter. This, on the other hand, will let you use overlay filter to > >> superimpose a video clip or transparent png watermark on another video. > >> This > >> has been tested with recent revisions of svn:// > >> svn.ffmpeg.org/soc/libavfilter rev. 5387 and ffmpeg rev. 19868 (16 Sep > >> 2009). Compiled and running under both x86 and x86_64 on linux. > >> > >> > >> Example 1 - insert transparent PNG watermark in bottom left corner of the > >> video: > >> -vfilters "movie=0:png:logo.png [wm];[in][wm] > >> overlay=10:mainH-overlayH-10:1 > >> [out]" > >> > >> Notice the last parameter to overlay ":1" - this enables alpha blending. > >> > >> > >> Example 2 - insert 2 different transparent PNG watermarks (second watermark > >> on bottom right corner): > >> -vfilters "movie=0:png:logo.png [wm];movie=0:png:logo2.png [awm];[in][wm] > >> overlay=10:mainH-overlayH-10:1 [int];[int][awm] > >> overlay=mainW-overlayW-10:mainH-overlayH-10:1 [out]" > >> > >> You could chain and add more overlays this way but the efficiency of such > >> approach is yet to be tested. > >> > >> > >> This should save you a lot of time and you can continue to use your > >> favorite > >> transcoder for web video publishing! > > > > While I normally oppose making non-committed code more complex, I think > > this feature is so often requested that it is worth the extra work in > > the future. Stefano, Michael, any strong opinion about this? > > I'm fine with committing the patch to soc if tested, even better would > be to try to push the filter to the main repo. Does someone want to > volunteer for this?
I'll apply the patch soon as this feature is probably the most requested for lavfi, then I'll work on a proper filter integration when the lavfi test system will be ready (I hope within a month). Regards. _______________________________________________ FFmpeg-soc mailing list [email protected] https://lists.mplayerhq.hu/mailman/listinfo/ffmpeg-soc
