Vom 29. bis 31 Mai 2009 (Pfingstwochenende) findet das SL Community Meeting 2009, oder kurz sl-treffen statt. Hier geht’s lang.

Now this is getting interesting. Sirikata is a free and open source Virtual Worlds system, from the Stanford Uni. It’s about to launch in Q1 2009, but the source is already available.

Here are 2 teaser videos, a fly around and a speech on technical details:

Sirikata Architecture from Sirikata on Vimeo.

Sirikata Teaser from Sirikata on Vimeo.

I’m off, trying to compile it. More later.

UPdate: Here is a 3rd video:

Sirikata from a content creator’s point of view from Henrik Bennetsen on Vimeo.

(via Phasinggrace and Raph Koster)

World Builder from Bruce Branit on Vimeo.

(via&thanx @RichWhite)

There’s a new program to capture OpenGL Sessions with Linux, glc. I did some simple tests with it today, and it seems to work very well.

glc-capture  -n  -s  -f 20 -g -o sl2.glc ./secondlife

creates a 800MByte file for a few minutes in SL.

# extract the audio stream

glc-play sl2.glc -o – -a 1 | lame -hV2 – /tmp/audio.mp3

# and make a 2 pass transcoding to a mp3/h264 avi.

glc-play sl2.glc  -o – -y 1 | mencoder -demuxer y4m – -nosound -ovc x264 -x264encopts qp=18:pass=1 -of avi -o /tmp/video.avi

glc-play sl2.glc -o – -y 1 | mencoder -demuxer y4m – -audiofile /tmp/audio.mp3 -oac copy -ovc x264 -x264encopts qp=18:pass=2 -of avi -o /tmp/video.avi

(70MByte for a 2:45 818×636 video)

But we can do better:

ffmpeg2theora /tmp/video.avi -o /tmp/video.ogv

This creates a file of half the size, and directly compatible to the new builtin video support for Firefox3.1 , Ogg/Theora.