[LAU] A3 video prev: syncing partially out of sync video and audio in existing files

Philipp Überbacher hollunder at lavabit.com
Fri Jun 10 22:44:25 UTC 2011

Excerpts from Robin Gareus's message of 2011-06-10 23:13:23 +0200:
> On 06/10/2011 10:36 PM, Ralf Mardorf wrote:
> > On Fri, 2011-06-10 at 21:44 +0200, Robin Gareus wrote:
> >> http://rg42.org/wiki/a3vtl
> > 
> > Wow, Ardour with MIDI sequencer and for video sync. I can't believe that
> > this is real. Am I awake?
> it's real. still somewhat alpha but it's been usable and was announced
> ~1 year ago on ardour-dev. Paul said he'll look into merging this
> endeavour around ardour-3.1 but there's no promise to that.
> I've demoed it at the LAC2011 and Dave has written about it:
> http://www.linuxjournal.com/content/ecology-ardour previously.
> > Any chance that it will work with 4 GB RAM (who cares for RAM, it's
> > cheap, but I can't buy a new mobo and CPU etc.), AMD 2.1 GHz dual-core,
> > HDSPe AIO or does this need some kind of super computer to do an
> > extensive production?
> sure. it's not too heavy on RAM, 128MB should do; but the more the
> better (video frame-cache). and you should have a >1.6GHz dual-core CPU
> for decoding PAL-DVDs in real-time.
> It's also possible to run 'icsd' (the video-decoding server) distributed
> on a cluster.
> > I would like to remove the OT for the subject, because this isn't OT. I
> > never have given up to get rid off MIDI jitter and I get rid of it, but
> > I have given up to get a workstation that would enable all I would like
> > to have.
> > 
> > On what hardware was it successfully used? What distro?
> amd64/x86-64 (GNU/Linux & OSX 10.6), i386 (Linux/win32) and PPC (OSX 10.5).
> I develop and use it in on Debian. Patrick Shirkey has tested it IIRC on
> Fedora/CCRMA, Dave Phillips' test system looks like Ubuntu; and Pau
> Arumi has reported some bugs and success as well on Fedora.
> 'icsd' is pretty much disto and OS agnostic.  However, Ardour3 only runs
> on GNU/Linux and requires a few tewaks for OSX.
> ciao,
> robin

The OT is gone.
This sounds really quite interesting Robin, I hope your patches will
receive further testing. Reliably working A3 with MIDI and video would
be a pretty good thing. Today I've seen that in the area of video GUI
solutions aren't working that well, but the tools are there. Everything
under one hood would be a useful thing.


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