hey y'all,
I'm in Mexico city trying to help the Centro Nacional de las Artes
develop a workshop/online educational material on Cinelerra. This
is a pretty exciting opportunity and we are lucky to be able to have
a 4 processor (each dual core) Macintosh at hand to set up an
editing station. It is a dual boot machine with osx on one side and
the latest ubuntu on the other, with Cinelerra running on the ubuntu
side of course.
My problem at the moment is speed. We have 1440x1080 interlaced DV
footage (taken from the last Piksel festival no less) and while it
plays a single track of video just dandy, when I add a second track
that is to play simultaneously with another track (above it), the
playback
slows down considerably. It doesn't matter if the top video is at
100% opacity, whenever there are two video tracks on the
time-line...the video is slow.
Of course, those of the people here who use final cut on the mac
side are not so happy about this....since final cut can easily play
two tracks of HD DV footage at once on the same machine.
I see that the CPU's are all being used and that it is not maxed out
there. I've tried everything in the Cinelerra handbook, but to no
avail. The machine has SATA drives ...so hdparm doesn't really
work to speed up the harddrive (afaik)....even though I doubt the
bottleneck is the harddrive. I've tried switching the internal
format to YUV, YUVA, RGB...etc.. No speed up. I've tried
switching the viewer to use X11, X11-XV, OpenGL...etc...and there
was some speedup with OpenGL, but not enough.
I've also tried all of those options on the compiled community
version, the compiled ADam Williams version, and the akirad
cinelerracv-smp version.
I have a feeling it is something internal to Cinelerra....or could
there be some magical Xorg server command that saves the day?
If you have any ideas or any suggestions, I'd love to hear it.
-august.
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