Sunday, June 6, 2010

QtzRendang - Open Source Quartz Composer Movie Renderer

QtzRendang in action

Announcing QtzRendang, a little utility app for rendering Quartz Compositions to movie files. I cobbled this together from example code for my own purposes, and since I couldn't find anything on the web. "My own purposes" typically involve rendering a loopy composition to a six or seven minute movie to make simple but effective videos for Cartoon Beats releases.

By the way, there is another app for this purpose developed by the Kineme crew - QuartzCrystal - which supports spatial and temporal oversampling to reduce temporal and visual jagginess. At US$18 this is a great little app, but as I'm a bit of a nerd and a cheapskate, and there wasn't an open source solution, I decided it was worth writing QtzRendang.

CoGe is another great project on Google code. It's an open source visualisation/VJ mixer/live sequencer.

Back to QtzRendang


Drag & drop a composition, specify frame resolution, duration, and frame rate & output filename. Optionally tweak composition parameters, then click render.

Why is it called QtzRendang? Well it renders .qtz files to movies, and the instant noodles I had that week were rendang flavour. Rendang is a slow-cooked Indonesian dish which seems like it would be pretty yum. I've never had it.

Any questions about the software itself please feel free to ask in the comments.

9 comments:

Anonymous said...

I assume this is osx 10.6 only. Be good if you specified that on the Google code page.

Haszari said...

Good point - done. (Yes - this requires 10.6.)

wideeyed said...

Any chance of a 10.5/10.6 release?

Are the obstacles to making this 10.5 compatible great?

Haszari said...

No plans to get this running on 10.5 yet. I know that the code to run the render on a background thread requires 10.6, and there may be some other things.

In principle it may be feasible to port to 10.5 - so I would suggest downloading the code and giving it a go.

If you get somewhere with this, let me know, so we can get the changes committed...

cybero said...

runs on 10.7 too

Haszari said...

Cheers for checking that Cybero - did not anticipate any issue but haven't checked myself!

Currently working on simple yet powerful qtz-powered visuals software, watch this space!

cybero said...

Now that 10.7.4 is out as an Update have found that qtzrendang runs danged slow •~

Haszari said...

I am surprised that 10.7.4 makes any difference to the performance. Thanks for letting me know - I'll take a look soon (of course feel free to check out the code yourself).

This also might be the push I need to write a cleaner better faster app for the Mac App Store!

PS cybero - do you use QtzRendang much? I would love to know what you use it for.

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