[SATLUG] screen recording tool

Borries Demeler demeler at biochem.uthscsa.edu
Sat Jul 20 12:56:31 CDT 2013


On Sat, Jul 20, 2013 at 12:50:49PM -0500, Don Davis wrote:
> I don't know off hand - but I know it works better with some obscure
> formats than one might expect. But aside of that - converting the
> video with ffmpeg would be trivial. (Given all the work you're doing
> with vnc and the specificity of your requests - adding and moving
> audio with openshot will improve overall quality with higher return on
> time than the other bits.)

Thanks for the suggestion, I think I'll try openshot - looks like a neat project,
I was not aware of it before.

-b.
> 
> On Sat, Jul 20, 2013 at 12:38 PM, Borries Demeler
> <demeler at biochem.uthscsa.edu> wrote:
> > On Sat, Jul 20, 2013 at 12:24:38PM -0500, Don Davis wrote:
> >> Can you just combine audio and video with openshot?
> >
> > Probably, haven't tried openshot. I have compiled kino on my slackware box, it
> > may be able to do it as well. I was just hoping for a solution where I do not
> > have to do any multiplexing/audio combining at all, and have both audio and video
> > be recorded in realtime. The less time I have to expend with this, the better.
> > Can Openshot work with flash video format?
> >
> > -b.
> >>
> >>
> >> On Sat, Jul 20, 2013 at 10:07 AM, Borries Demeler
> >> <demeler at biochem.uthscsa.edu> wrote:
> >> > On Thu, Jul 18, 2013 at 03:09:47PM -0500, Austin Lowery wrote:
> >> >> I have played around with Recordmydesktop and Kazam from the Ubuntu 13.04
> >> >> software center and with my set up Kazam is a winner for sure.
> >> >> Recordmydesktop is great for videos about 30 seconds long, and then for
> >> >> some reason it just stops recording. Its probably just my set up though.  I
> >> >> can take long high resolution viedos with Kazam.
> >> >>
> >> >> I am running an Intel® Core? i5-3470 CPU @ 3.20GHz × 4 with 8 gigs of ram.
> >> >
> >> > I tried both of these without success. Recordmydesktop basically failed to
> >> > record fast enough, and the -fps setting seemed to be without effect. And
> >> > that was on an 8-core I7 with ssd drive and 8GB RAM, certainly enough
> >> > horsepower. Kazam requires Python 3.2, Slackware comes with 2.7.3 in
> >> > the latest version so it refuses to run under Slackware. I don't have
> >> > an Ubuntu box to try it.
> >> >
> >> > I think I may have found something that would work: a combination of
> >> > vnctoflv, x11vnc and the KDE plasma desktop effects. I can run x11vnc
> >> > on my linux :0 desktop on my second screen and record that screen with
> >> > vnctoflv. The recorded flash video is smooth and very high quality. I can
> >> > resize the resolution of the second screen easily with desktop setting
> >> > app in KDE to whatever I need and with the plasma desktop in KDE I can
> >> > use various magnification effects to highlight and magnify a rectangle
> >> > around the mouse which nicely tracks on the vnc screen and gets recorded,
> >> > so I have my magnification effect incorporated. One thing I would like to
> >> > be able to do is panning under vnc (not scrolling), where the desktop
> >> > dynamically expands by following the mouse. Haven't figure this one out
> >> > yet.
> >> >
> >> > One thing that I also need to figure out is how to record a mp3 sound
> >> > track and multiplex it synchronized to the flash movie. There is an app
> >> > that comes with the vnctoflv program that is supposed to do that.
> >> >
> >> > Some more testing needed....
> >> >
> >> > Thanks for all the suggestions! -b.
> >> >>
> >> >>
> >> >> On Wed, Jul 17, 2013 at 3:54 PM, Borries Demeler <
> >> >> demeler at biochem.uthscsa.edu> wrote:
> >> >>
> >> >> > Thanks Don, tried wink, but it crashes on my install - looks like the
> >> >> > wrong glibc ver...  I'll try it on another computer. Thanks for the tip
> >> >> > though, will try some of the others on your list.
> >> >> >
> >> >> > -b.
> >> >> >
> >> >> >
> >> >> > On Wed, Jul 17, 2013 at 03:40:02PM -0500, Don Davis wrote:
> >> >> > > I was not (very) lucky with the top GNU/Linux candidates that people
> >> >> > > most frequently mention e.g. recordmydesktop, Istanbul, etc. They
> >> >> > > provided basic functionality but flaked out a bit.
> >> >> > >
> >> >> > > As far as making instructional videos with a screen capture tool in
> >> >> > > Linux - I had the most luck with 'Wink' - it's free but not open source.
> >> >> > > It makes editing and adding extras (e.g. arrows, stickies, etc.) quite
> >> >> > easy.
> >> >> > >
> >> >> > > http://www.debugmode.com/
> >> >> > >
> >> >> > >
> >> >> > > Most screen capture recommendations I saw with a quick Google search
> >> >> > > were pretty basic. This one had Wink and some I hadn't seen before - so
> >> >> > > it might be worthwhile:
> >> >> > > http://ostatic.com/blog/six-top-screen-capture-tools-for-linux
> >> >> > >
> >> >> > >
> >> >> > >
> >> >> > > On 07/17/2013 03:30 PM, Borries Demeler wrote:
> >> >> > > > Does anybody have any experience with using screen recording tools in
> >> >> > > > Linux that can produce videos that can be uploaded to youtube or some
> >> >> > > > other website in a generic video format? I want to create a series of
> >> >> > > > instructional videos for our software. I have done this in the past by
> >> >> > > > recording a statically sized VNC window big enough to capture the whole
> >> >> > > > screen (and rather large/complex GUI elements) and converting the
> >> >> > captured
> >> >> > > > vnc session into a flash movie.
> >> >> > > >
> >> >> > > > The problem with this approach is that some screens and apps are so
> >> >> > large
> >> >> > > > that I need to make a very big vnc window (and hence a large sized
> >> >> > video
> >> >> > > > format) in order to capture the entire application. On youtube I have
> >> >> > > > seen recordings where preset (smaller) sized screen segments follow the
> >> >> > > > mouse, so that preset sized screen segment is not too large for small
> >> >> > > > screens, but still everything is shown at high resolution, even if the
> >> >> > > > entire screen can not be seen. I also need the ability to record sound
> >> >> > > > and multiplex that with my screen video recording, it would be best if
> >> >> > > > the recording can do this simultaneously.
> >> >> > > >
> >> >> > > > If you can offer a recommendation based on prior experience for
> >> >> > something
> >> >> > > > that is stable and has the needed features that would be great!  An
> >> >> > open
> >> >> > > > source solution I can compile without an endless list of dependencies
> >> >> > > > under a recent version of Slackware would be preferred.
> >> >> > > >
> >> >> > > > Thanks for any tips!
> >> >> > > >
> >> >> > > > -borries
> >> >> > > --
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