Came across this page... intended to showcase the high-end capabilities of WMV9... http://www.microsoft.com/windows/windowsmedia/content_provider/film/ContentShowcase.aspx Just thought some people might be interested in it to make some comparisons... and it's also probably some of the highest quality sample material i've found on the net... so it's also useful for me to use as source material for testing high res transcoding in theora... and 6 channel audio in the highest res. The system requirements are pretty high though ! Plus theres some pretty cool vids among them... quite a bit of old IMAX footage. Cheers, Zen.
On Sun, 19 Sep 2004, illiminable wrote:> Came across this page... intended to showcase the high-end capabilities of > WMV9... > > http://www.microsoft.com/windows/windowsmedia/content_provider/film/ContentShowcase.aspx > > Just thought some people might be interested in it to make some > comparisons... and it's also probably some of the highest quality sample > material i've found on the net...The highest quality HD-material I know of (just test sequences, not movie-like) are the 1080p/1080i//720p HDTV-test clips available at TU Muechen: ftp://ftp.ldv.e-technik.tu-muenchen.de/pub/test_sequences/ http://www.ldv.ei.tum.de/liquid.php?PRINTVIEW=1&page=70 It's uncompressed YUV 4:2:0, which is a major difference to all other HD-sources I know of, because high frequencies aren't quantized away. It's amazing how bad codecs start to behave if you feed them with uncompressed input instead of the typical DVD-"quality" VOBs.> so it's also useful for me to use as > source material for testing high res transcoding in theora... and 6 channel > audio in the highest res.I did some transcoding testing with those for XviD a while ago. It's rather easy to recompress at much lower bitrate at no real visible differences. I guess that's because WMV is somewhat close to MPEG-4, and in particular, these WMV files are intended for HD-DVDs and not tweaked to get the most out of the bitrate. So, if Theora performs well, that's a good sign, but don't get too excited. Christoph
If your looking for test source material you will find some high quality, uncompressed stuff at: http://www.ldv.ei.tum.de/liquid.php?page=70 I'd be interested if anyone knew of other uncompressed source sequences. Tim At 16:43 19/09/2004 +0800, illiminable wrote:>Came across this page... intended to showcase the high-end capabilities of >WMV9... > >http://www.microsoft.com/windows/windowsmedia/content_provider/film/ContentShowcase.aspx > >Just thought some people might be interested in it to make some >comparisons... and it's also probably some of the highest quality sample >material i've found on the net... so it's also useful for me to use as >source material for testing high res transcoding in theora... and 6 >channel audio in the highest res. > >The system requirements are pretty high though ! > >Plus theres some pretty cool vids among them... quite a bit of old IMAX >footage. > >Cheers, > >Zen. > >_______________________________________________ >Theora-dev mailing list >Theora-dev@xiph.org >http://lists.xiph.org/mailman/listinfo/theora-dev