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Hello,<br>
I also was studying Theora a month ago. I wanted to integrate
Theora in a online conference system. I encoded <br>
the video from a webcam using Theora and Xvid. Then I made a comparison
between Theora and Xvid performaces. <br>
I measured how long does it take for Theora to encode an 640x480 image
from the webcam (th_encode_ycbcr_in and th_encode_packetout <br>
API calls). I was doing this while shaking the camera, generating a lot
of keyframes. On average: *80 ms*.<br>
Using XVID I've obtained between *20-25 ms* for an image. That's
60ms longer using Theora.<br>
Also, the CPU load was higher in case of Theora.<br>
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<p style="margin-bottom: 0cm;">I've used libtheora 1.1, release_sse2, full optimization.</p>
Used hardware/software:
Processor Pentium(R) Dual-Core CPU E5200 @ 2.50GHz, 2400
Mhz, 2 Core(s), 2 Logical Processor(s)
Installed Physical Memory (RAM) 2.00 GB
OS Name Microsoft® Windows Vista (TM)
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<br>
<br>
<br>
<pre class="moz-signature" cols="72">Mircea Gliga
</pre>
<br>
On 05/01/2010 06:49, iMDT - Tiago Jacobs wrote:
<blockquote cite="mid:4B42C4F5.2080806@imdt.com.br" type="cite">
<pre wrap="">Hello, i am member of red5 project. I am studying ways to integrate your
codec into red5 and in a near future inside Flash Player.
I want to figure some things about Theora codec.
-> Is theora proper for live streams (i.e live transcondig webcam)?
What is latency for encoding process?
-> Is the format tolerant to lost frames?
Thanks for the moment.
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