On Mon, 2009-02-09 at 12:36 +0100, Dominik 'Rathann' Mierzejewski wrote: > On Sunday, 08 February 2009 at 23:43, Martin Sourada wrote: > > Hi, > > > > sorry for cross-posting but I wanted all interested parties to not miss > > this email ;-) > > > > There has been some media related discussion in the -devel list and one > > of the points I have taken form it is that we should promote FLOSS > > multimedia and don't blame others for doing it (even if it's done in a > > not ideal way)... Now, the problem is that the actual support of these > > in our system is crappy. Out of the combinations of two FLOSS containers > > (matroska and ogg) and two FLOSS video codecs (dirac and theora) I know > > only one (ogg + theora) actually works in xine-lib (used by KDE4) which > > is pathetic. > > > > So I created a wiki page (not sure what name space to use, so I put it > > under my user page for starters) [1] which tracks the situation. I don't > > have much time lately due to university duties, so I put there only > > things I know of and didn't researched further. So if you know of any > > FLOSS container, video or audio codec, feel free to add it there. Also > > feel free to reference upstream bugs about the mentioned issues. The > > videos used for reference testing are available at my fedora people page > > [2]. > > Big thanks for doing this and providing samples. How did you create them? > I'm filing bug reports for FFmpeg problems as I write this. I hope they > will get resolved in a timely manner. > I've taken two old photos, resized/croped them to PAL resolution (720x576), added text in inkscape, created simple cross-fade effect using gimp and finally encoded/muxed them in gstreamer using dirac buck bunny makefiles as a starting point [1]. Theora options were 'quality=63' and schroedinger options were 'rate-control=0 noise_threshold=34'. Interesting thing I noticed was that the videos, even when compressed losslessly using dirac, are slightly less sharp than the original images [2]. > Regards, > R. Martin References: [1] http://diracvideo.org/wiki/index.php/Encode_Big_Buck_Bunny [2] http://mso.fedorapeople.org/codecs-test/source/
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