Help creating screencasts on Ubuntu. keeping audio and video in sync

tchomby tchomby at googlemail.com
Mon Sep 15 20:36:56 BST 2008


Okay, I've given up. I sent an urgent request to support and asked them to
install Windows for me. I did make some progress...

I installed the latest version of recordmydesktop using the deb file from
www.getdeb.net. I don't think that made any difference, cause the first test
I ran at my normal 1280*1024 resolution had the usual sync problems. Then I
decided to try a lower resolution, 800*600, and I found the sync was almost
perfect. For some reason its slightly better if recordmydesktop is run with
on-the-fly-encoding than if it's run without. Whenever something big changes
on screen, like a window opening, things go briefly out of sync, but
recover, and at 800*600 this effect is acceptably minimal. At 1024*768 it's
slightly worse, but still okay. This is all on Ubuntu using the real-time
kernel, I never tried it at low-res without the real-time kernel.I never
tried xvidcap either, nor this clever approach of running recordmydesktop
and audacity at the same  time. But even if you can record things in sync,
there are more problems to come.

I couldn't import the OGG file into Kino, it just didn't work, and I don't
understand avidemux. It doesn't look like Avidemux can do the video editing
things that Kino does, like muting out coughs, adding text, etc. I don't
want to have to learn cinelerra, even if I did, there will probably only be
more problems to come, it's all just too difficult.

I watched the tutorial videos for Camtasia and it almost brought a tear to
my eye, it looks like it just makes everything so easy. Whoever writes an
equivalent for linux will be a real hero, that's no easy program to write. I
really, really hope it works for me.

Since I still need linux to do all my other work I'm planning on installing
it as a vritual machine on Windows. Friends of mine have done this before,
and it seemed to be flawless for most tasks.

A cheeky trick did occur to me. It makes me sad that Windows will be
featured in my screencasts that I'll put so much work into. But could I not
use Camtasia in Windows to screen-capture the window containing the Ubuntu
virtual machine? This should work in theory, shouldn't it?
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