Improving the visual quality of Theora when using Xuggler

I'm looking for fellow users, who are using Xuggler to produce video encoded with Theora. I've tried a lot of different options to get "good" quality using presets to no avail. I would love to get quality anywhere close to what I can produce with the Miro converter tools defaults. Sadly, the web doesn't seem to have much to say except开发者_如何学C that we should all "use ffmpeg2theora" which is not an option when using Xuggler, and I have to use Xuggler in this case.

My listener which configures the codecs is here: http://pastebin.com/MX2r5KsC

And my reference preset file is here: http://pastebin.com/fBeZxSGr

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A solution was found by a colleague / client on a related project. The resolution is surprisingly simple, and consists of the following three lines of code:

coder.setFlag(IStreamCoder.Flags.FLAG_QSCALE, false);
coder.setBitRate(200000);
coder.setTimeBase(IRational.make(1,25));

This forces Xuggler to encode using a constant bitrate of 200kbps and with a frame rate of 25 fps. I hope this helps my fellow Xuggle users out there.