linuxaudio.org

On Thu, 18 Feb 2010, Robin Gareus wrote:
> For post-prod I assume you don't want to sync ardour to incoming LTC but

quoted text
> rather want to import audio-samples into ardour at an offset given by LTC.

>

> I had some scripts to extract the first LTC timecode [of an LTC timecode

> file accompanying an audio-file] and write that into the

> broadcast-header of the audio-file (which ardour understands). That

> mechanism does not take variable speed LTC into account but otherwise

> worked just fine. If that's what you want to do let me know and I'll go

> looking for them..

>

  Well, this all may be moot, because the videographers themselves haven't

gotten back to me.  I was just trying to learn how I could best

interoperate with them.  I won't be doing any of the video editing myself,

and ultimately, I'll just give them a stereo track, and I was hoping I

could also carry along a timecode track to ease their job of sync'ing it

up.  This is a university-level Student/professor group doing the

shooting, and I don't know if they're even going to the trouble of

sync'ing their cameras' clocks, much less prepared to provide me with any

form of clock sync.  I'm just trying to get myself up to speed so that I

know how to deal with whatever they throw at me.

   I've been told by a local friend that it's not worth the trouble.  Video

is approx 30 FPS, and audio is 48k S/s, so alignment 'by ear' is 'good

enough'.  That may be what they're planning to do anyway...
   Reading the Ardour manual, and poking thru the menus, I found an option

to send MTC, but not one to receive MTC.  I don't want to be responsible

for providing a clock to the video recorder(s).  Ardour's timeline always

starts at 0:00, and I haven't found any option to use wall time instead.

If they were to try using MMC to sync the audio during post, it would

depend on both the DAW and the video editor using the same clock.
--

Rick Green
"Those who would give up essential Liberty, to purchase a little

temporary Safety, deserve neither Liberty nor Safety."

                                   -Benjamin Franklin
"As for our common defense, we reject as false the choice between our

safety and our ideals."

                                -President Barack Obama 20 Jan 2009

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