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Support for JACK Audio in Adobe Flash

I use JACK quite frequently for playing guitar and recording etc, and while it is quite flexible, one thing I was unable to do was this: Get Flash audio to route through JACK. Most commonly this is when I want to play a Youtube video, and I find I have to stop jackd, which requires shutting down most JACK-aware applications, play the video, restart JACK, blah blah blah. Not really functional.


A quick search and I found libflashsupport-jack – and was excited! Look, something to make Flash work with JACK! So I checked out the git repo at git://repo.or.cz/libflashsupport-jack.git but it wouldn’t compile. Looked into it, and the major problem was that it includes a deprecated file in the kernel headers: linux/videodev.h, but alas, as of kernel version 2.6.38 the header file linux/videodev.h is no longer included in the kernel.


Long story short: I got the file, put it in with the libflashsupport source, hacked around with the code a bit, and TADA! I can now play Flash when JACK is running!


Even more importantly, for you that is, I’ve made a fork of the old repo, and have made the new working version available!


I’ll set up a proper homepage for this little project, but for now I’ll just link to the github repo and some instructions Note: if you go to http://github.com/pvint/libflashsupport-jack2 there is also a link to download a zipfile):

git clone git://github.com/pvint/libflashsupport-jack2.git
cd libflashsupport-jack2
sh bootstrap.sh
make install

(You must be root to do the make install, of course)
On a 64bit platform, you’ll likely need to create a symlink as well to get Flash to use this:

ln -s /usr/local/lib/flashsupport.so /usr/lib64


Now, fire up your JACK and your browser (You may need to restart the browser if it’s running), and try it out, it should just work!


If you have any issues, feel free to drop me a not here or by email.

This post was written by

– who has written 17 posts on DotSlash.ca.
Plain old nerd.

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