'[theora] libtheora 1.1 problem? with firefogg and ffmpeg2theora'

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List:       theora
Subject:    [theora] libtheora 1.1 problem? with firefogg and ffmpeg2theora
From:       "Orton AKINCI aka .-_-." <ortonak () yahoo ! com>
Date:       2009-08-21 17:06:05
Message-ID: 96901.62733.qm () web51105 ! mail ! re2 ! yahoo ! com
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hi all, 

i have been trying to export some videos using firefogg in two pass mode. the problem \
i get recently with various files is that when i choose a low bitrate (for example \
1200kbps for a 512x224 25fps video with so many details) the video quality is very \
very good at the beginning (much better then my quality based -v 5 export which \
produces a 1204kbps video with the same build) and then the pixel blocks get bigger \
and bigger towards the end of the video and at the end they become very very big at \
the end and quality becomes so so poor. i have been making so many test exports for \
two different source files (same specs except for resolution) both with firefogg \
(libtheora 1.1 20090806) and ffmpeg2theora (libtheora 1.1 20090805) in command line \
and i get the same result... i think there is a problem with the bitrate distribution \
through the video for 1.1 since the beginning of the exported video has a better \
quality than expected and the end has a very bad  quality...

you can download an exported sample file here if you like (75MB):
http://cc.httpdot.net/test/
my source file is a 768x336px 25fps raw quictime video

i don't know if this is a known issue but i haven't seen anything about it on the \
list. anyway i just wanted to let you know. 

 .-_-.

[Attachment #5 (text/html)]

<html><head><style type="text/css"><!-- DIV {margin:0px;} \
--></style></head><body><div style="font-family:tahoma,new \
york,times,serif;font-size:10pt;color:#000000;">hi all, <br><br>i have been trying to \
export some videos using firefogg in two pass mode. the problem i get recently with \
various files is that when i choose a low bitrate (for example 1200kbps for a 512x224 \
25fps video with so many details) the video quality is very very good at the \
beginning (much better then my quality based -v 5 export which produces a 1204kbps \
video with the same build) and then the pixel blocks get bigger and bigger towards \
the end of the video and at the end they become very very big at the end and quality \
becomes so so poor. i have been making so many test exports for two different source \
files (same specs except for resolution) both with firefogg (libtheora 1.1 20090806) \
and ffmpeg2theora (libtheora 1.1 20090805) in command line and i get the same \
result... i think  there is a problem with the bitrate distribution through the video \
for 1.1 since the beginning of the exported video has a better quality than expected \
and the end has a very bad quality...<br><br>you can download an exported sample file \
here if you like (75MB):<br><span><a target="_blank" \
href="http://cc.httpdot.net/test/">http://cc.httpdot.net/test/</a></span><br>my \
source file is a 768x336px 25fps raw quictime video<br><br>i don't know if this is a \
known issue but i haven't seen anything about it on the list. anyway i just wanted to \
let you know. <br><br>&nbsp;.-_-.<div><br></div></div><br>

      </body></html>

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