On Tue, Jun 17, 2014 at 09:59:25PM +0200, Anton Khirnov wrote: > > On Wed, 7 May 2014 00:37:41 +0200, Alessandro Ghedini <[email protected]> > wrote: > > Hi, > > > > I've been working on merging the GIF encoder from ffmpeg, since libav's > > doesn't > > seem to work very well (in my tests anyway), and my initial approach has > > been to > > simply copy/paste lavc/gif.{c,h} and lavf/gif.c, make them compile and see > > how > > it goes (I'm using libav.git). > > > > While I've been able to compile the whole thing (with a little bit of work, > > due > > to missing av_copy_packet() and ff_alloc_packet2()), I'm still having > > problems > > apparently related to pixel formats. > > > > Basically, when I'm using ffmpeg (ffmpeg -i test.mkv test.ffmpeg.gif) it > > selects > > "bgr8" and everything goes fine. > > > > > Output #0, gif, to 'test.ffmpeg.gif': > > > Stream #0:0: Video: gif, bgr8, 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, > > > 200 kb/s, 100 tbn, 30 tbc > > > > but when I use avconv, it selects "gray" (which is not what I want): > > > > > Output #0, gif, to 'test.libav.gif': > > > Stream #0.0: Video: gif, gray, 1920x1080 [PAR 1:1 DAR 16:9], q=2-31, > > > 200 kb/s, 100 tbn, 1k tbc > > > > and if I use "-pix_fmt bgr8" the output image is broken. > > > > Compare [0] generated with ffmpeg, and [1] genenerated with "improved" > > avconv. > > > > I've also tried copying lavu/pixdesc.{c,h} too, but nothing changed, and it > > happens with all the other input files I've tried, so it shouldn't be > > specific > > to the input file used. > > > > Does anyone have an idea of what may be causing this? (e.g. if there's a > > special > > avconv option I have to use, or if it is a bug in the gif encoder or in > > other > > parts of libav). > > > > If you want to test this I've setup a fork of libav.git at [2] with my WIP > > patches (they still need to be split in proper commits) in the "gif" branch. > > > > ping > So what happened to sending this?
There's some more work to do (fix tests, fix vf_scale, import decoder too), but I don't have much time for it right now so I had to put it aside. I still plan to finish this at some point though, it's just not very high in my todo list at the moment. Cheers
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