Low Latency vs. Real Time Kernel
by Brian Monroe
I've been spending a lot of time on the #opensourcemusicians channel
talking to Ubuntu Studio users about their kernel and latency times they're
getting. Seems like most of them are using g a stock kernel with the
preemptive option enabled and they are getting great latency results
(2ms)while utilizing the @audio group on their user. I ended up compiling
my own low latency kernel and I haven't had any issues with it yet. If this
is what we are missing for the spin I'd be happy to maintain packaging for
the kernel. I know ccrma has been behind a few kernel releases.
I saw the instructions for adding the real time patch for a tick less
kernel and from what I can tell it wouldn't be hard to get that rolling as
well.
I'm not entirely sure what ccrma does differently with their kernels
compared to other Linux users, and I'm still a bit of a noob so I could be
off base with this, but I would reason that we should be able to just
utilize the same settings to archive similar performance enhancements.
I thought I read that ccrma uses a unique scheduler, but if we could get a
2ms latency time without it, the point may be moot.
8 years, 10 months
Jam represented well at SCaLE.
by Brian Monroe
Hey guys, I was at the Southern California Linux Expo (SCaLE) this weekend
to work the Fedora booth. Just wanted to let you all know that I brought a
laptop with the spin installed on it, set it up with a Fast Track Pro, mic,
keyboard, keyboard stand, and a guitar.
I was running Ardour, Hydrogen, Guitarix, and Qsynth,
I had done a cover song in Ardour/Hydrogen, and was ready to help people
start adding to it/messing with it.
Surprising to me, not that many people really cared about the recording but
a TON of people were shocked by the guitar/effects and wanted to play. At
times it drew a fairly large crowd and started a ton of conversations that
we wouldn't have had at the booth without it.
We actually won the "Most Interesting Booth" award from SCaLE.
Some interesting things I took away from conversations with people who
stopped by:
1) Several Asked if there was a group install (so like +5 on that idea)
2) Many of these people weren't real linux users and asked if there were
specific instructions on how to set it up. Two of these asked if there was
a youtube video showing how to do it, which I think is a great idea, and
I'll do if no one else wants to pick it up.
3) Two people asked if there was any music that was recorded with Jam, I
didn't know of any, and I can't think of anyone who has. Anyone have any
input on this?
5) Several people were asking for Ableton-like programs and I didn't know
of any that were on the spin.
4) What do you guys think about a Fedora Activity Day where we can maybe do
a joint effort for a group recording project? Not quite sure how that would
look, but I think it's doable.
There are a few other easy fixes for us to change on the spin, but I'll
address those later. Great job guys!
I wish I had remembered to take pictures of the rig, but I didn't. I'll
look for a few and see if I can get one.
9 years, 6 months
Video converter from Official fedora repositories
by Hammad Haleem
I need to develop a rest API for publish and convert the videos
A major what I am facing, I need a free converter for convert any format
video in OGV. Even though ffmpeg is the best candidate, but we I cannot use
it because not is in official Fedora repository, just is in rpmfusion. I am
developing a product that would be deployed on Fedora infra, they only
deploy applications via packages into epel6.
Can you guys suggest something from official fedora repository ?
--
Regards
Hammad Haleem
9 years, 7 months
