Alex Weiss wrote:

> But no
> luck so far -- this whole syncing issue is way more pesty than I thought,
> and I can't find _any_ literature on syncing audio and video in a realtime
> context.

Thats because its a bit of a black art.

> Has anybody ever tried anything like this, or would anybody know
> at least where to start?

Over a decade ago I worked for company that produced high end equipment
for post production work. WHile there, I designed the hardware that
synchronised the audio clocks to external audio and video clocks.

Places to start would be to look at the JACK audio connect kit on
Linux (also OSX I think) and see if you can get Csound following
that.

Another possiblity would be to get Csound generating a Linear Time
Code audio track (if LTC is still being used) and have the external
video machines follow that.

Erik
-- 
----------------------------------------------------------------------
Erik de Castro Lopo
http://www.mega-nerd.com/

------------------------------------------------------------------------------
Try before you buy = See our experts in action!
The most comprehensive online learning library for Microsoft developers
is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3,
Metro Style Apps, more. Free future releases when you subscribe now!
http://p.sf.net/sfu/learndevnow-dev2
_______________________________________________
Csound-devel mailing list
Csound-devel@lists.sourceforge.net

Alex Weiss wrote:

> On Sun, Jan 22, 2012 at 11:30 PM, Erik de Castro Lopo
> wrote:
> >
> >
> > Over a decade ago I worked for company that produced high end equipment
> > for post production work. WHile there, I designed the hardware that
> > synchronised the audio clocks to external audio and video clocks.
> >
> 
> That sounds both amazing and terrifying!

It worked out really well in the end. Our machine was one of the fastest
to lock onto external sources and had one of the lowest audio clock
jitters at the time. It was a nice little project.

> That's a great idea for external video hardware, but what I'm trying to do
> is completely software-based, e.g. I just want to play a QT video file in
> hard sync to csound. I realize that a lof of the nasty details are
> OS-dependent, but I think what I'm struggling with are the underlying
> principles (if there are any, that is...). Oh well...

What OS are you on? JACK may be a solution.

Erik
-- 
----------------------------------------------------------------------
Erik de Castro Lopo
http://www.mega-nerd.com/

------------------------------------------------------------------------------
Try before you buy = See our experts in action!
The most comprehensive online learning library for Microsoft developers
is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3,
Metro Style Apps, more. Free future releases when you subscribe now!
http://p.sf.net/sfu/learndevnow-dev2
_______________________________________________
Csound-devel mailing list
Csound-devel@lists.sourceforge.net

Which reminds me - does the latest csound have the ability to control or follow the jack transport yet? If csound could rewind the score when the transport hits 0, and seek with the transport, etc, you could hack together a video scoring app with a simple frontend to edit a notelist (tclcsound and a text widget would suffice) plus xjaedo to view the video.

Alex Weiss wrote:
> On Sun, Jan 22, 2012 at 11:51 PM, Erik de Castro Lopo
> wrote:
>>
>> What OS are you on? JACK may be a solution.
> 
> 
> I'm on OS X, so Tito's suggestion of looking into Xjadeo sounds promising.
> I'll take a look at the code... Thanks!
> 
> 
> 
> ------------------------------------------------------------------------
> 
> ------------------------------------------------------------------------------
> Try before you buy = See our experts in action!
> The most comprehensive online learning library for Microsoft developers
> is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3,
> Metro Style Apps, more. Free future releases when you subscribe now!
> http://p.sf.net/sfu/learndevnow-dev2
> 
> 
> ------------------------------------------------------------------------
> 
> _______________________________________________
> Csound-devel mailing list
> Csound-devel@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/csound-devel


------------------------------------------------------------------------------
Try before you buy = See our experts in action!
The most comprehensive online learning library for Microsoft developers
is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3,
Metro Style Apps, more. Free future releases when you subscribe now!
http://p.sf.net/sfu/learndevnow-dev2
_______________________________________________
Csound-devel mailing list
Csound-devel@lists.sourceforge.net

http://www.csounds.com/manual/html/jacktransport.html

On 23 Jan 2012, at 10:31, Justin Glenn Smith wrote:

> Which reminds me - does the latest csound have the ability to control or follow the jack transport yet? If csound could rewind the score when the transport hits 0, and seek with the transport, etc, you could hack together a video scoring app with a simple frontend to edit a notelist (tclcsound and a text widget would suffice) plus xjaedo to view the video.
> 
> Alex Weiss wrote:
>> On Sun, Jan 22, 2012 at 11:51 PM, Erik de Castro Lopo
>> wrote:
>>> 
>>> What OS are you on? JACK may be a solution.
>> 
>> 
>> I'm on OS X, so Tito's suggestion of looking into Xjadeo sounds promising.
>> I'll take a look at the code... Thanks!
>> 
>> 
>> 
>> ------------------------------------------------------------------------
>> 
>> ------------------------------------------------------------------------------
>> Try before you buy = See our experts in action!
>> The most comprehensive online learning library for Microsoft developers
>> is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3,
>> Metro Style Apps, more. Free future releases when you subscribe now!
>> http://p.sf.net/sfu/learndevnow-dev2
>> 
>> 
>> ------------------------------------------------------------------------
>> 
>> _______________________________________________
>> Csound-devel mailing list
>> Csound-devel@lists.sourceforge.net
>> https://lists.sourceforge.net/lists/listinfo/csound-devel
> 
> 
> ------------------------------------------------------------------------------
> Try before you buy = See our experts in action!
> The most comprehensive online learning library for Microsoft developers
> is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3,
> Metro Style Apps, more. Free future releases when you subscribe now!
> http://p.sf.net/sfu/learndevnow-dev2
> _______________________________________________
> Csound-devel mailing list
> Csound-devel@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/csound-devel

Dr Victor Lazzarini
Senior Lecturer
Dept. of Music
NUI Maynooth Ireland
tel.: +353 1 708 3545
Victor dot Lazzarini AT nuim dot ie




------------------------------------------------------------------------------
Try before you buy = See our experts in action!
The most comprehensive online learning library for Microsoft developers
is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3,
Metro Style Apps, more. Free future releases when you subscribe now!
http://p.sf.net/sfu/learndevnow-dev2
_______________________________________________
Csound-devel mailing list
Csound-devel@lists.sourceforge.net