<p>It appears that safari has some blurriness too. I encoded high qualiety theora video using xiphqt. <br>
The video is at <a href="http://tsg.davefilms.us">tsg.davefilms.us</a></p>
<p>Dave Johnson<br>
6195496830<br>
<a href="http://www.davefilms.us">http://www.davefilms.us</a></p>
<p><blockquote type="cite">On Feb 6, 2010 10:56 PM, "Basil Mohamed Gohar" <<a href="mailto:abu_hurayrah@hidayahonline.org">abu_hurayrah@hidayahonline.org</a>> wrote:<br><br>I just finished using my mother's PC which is running Windows XP. I<br>
downloaded & installed, or already had installed, the latest versions of<br>
VLC Media Player (1.0.5), Media Player Classic - Home Theater (last<br>
release was in August 2009), Miro (already installed), Mozilla Firefox<br>
(3.6), Google Chrome (latest from website today), Opera (10.50 Alpha,<br>
latest build from the website), and SMplayer (the recommended GUI for<br>
Mplayer on Windows, apparently, again, latest from website today).<br>
<br>
ALL of the players, with the exception of Mozilla Firefox (3.6) & Google<br>
Chrome displayed significant blurriness. In fact, the sharpest render<br>
came from Mozilla Firefox, something I found quite interesting. Miro<br>
may or may not have had the same issue, but it crashed while playing the<br>
file, after first saying it didn't support Ogg Theora files (!), AFTER<br>
showing a preview. It then played it the second time I tried to load<br>
it, but then crashed. I was unable to play a video standalone in Opera<br>
- I suppose this is because it supports playing the videos within<br>
<video>, but not as a standalone file (i.e., directly from the URL). I<br>
did not take the time yet to prepare a simple page to replicate this<br>
test in that manner.<br>
<br>
The two files I used for testing were the following:<br>
<br>
<a href="http://media.basilgohar.com/preview/theora/balcony-2-vga30p.y4m-q10.ogv" target="_blank">http://media.basilgohar.com/preview/theora/balcony-2-vga30p.y4m-q10.ogv</a><br>
<a href="http://media.basilgohar.com/preview/theora/balcony-4-vga30p.y4m-q10.ogv" target="_blank">http://media.basilgohar.com/preview/theora/balcony-4-vga30p.y4m-q10.ogv</a><br>
<br>
What inspired me to make this test is the fact that gmaxwell (I think)<br>
in #theora mentioned the problem, and linked to a reddit comment he made<br>
in response to someone's criticism of libtheora's quality compared with<br>
some H.264 video. I thought to just test VLC first, but when I noticed<br>
it again in SMplayer, I just decided to test all the players that I<br>
could find. After this test, I am much dismayed to find that the vast<br>
majority of users will be experiencing subpar Theora performance, as<br>
outside of Firefox & Google Chrome, the blurriness appears to be<br>
present. I am fairly sure that all of the above-mentioned media<br>
players, aside from Firefox, use some form of libav*. However, I<br>
thought Google Chrome likewise used an ffmpeg-based video library, which<br>
I thought was libav*.<br>
<br>
I believe this to be a significant hindrance to adoption of Theora as<br>
video standard, because the latest versions of a wide variety of players<br>
all appear to display this bug.<br>
<br>
Notably absent is any mention of Xiph-based decoders, such as DirectShow<br>
filters. I did not take the same to test those yet, but perhaps I will<br>
take some more time and do that on my own PC.<br>
<br>
--<br>
Basil Mohamed Gohar<br>
<a href="mailto:abu_hurayrah@hidayahonline.org">abu_hurayrah@hidayahonline.org</a><br>
<a href="http://www.basilgohar.com/blog" target="_blank">http://www.basilgohar.com/blog</a><br>
basilgohar on <a href="http://irc.freenode.net" target="_blank">irc.freenode.net</a><br>
GPG Key Fingerprint: 5AF4B362<br>
<br>
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</blockquote></p>