|
|
Posted by Rick Merrill on 10/07/07 20:56
Richard Crowley wrote:
> "Rick Merrill" wrote ...
>> Richard Crowley wrote:
>>> "Rick Merrill" wrote ...
>>>> Does anyone ever measure the accuracy of their blackburst
>>>> timing?
>>>
>>> Do you mean the subcarrier frequency?
>>> Or the length of the various portions of the waveform (back porch, 8
>>> cycles of burst, etc.)
>>> Or the long-term timing (agreement with wall-
>>> clock, etc.)
>>>
>>> Is there a specific problem you are trying to solve?
>>
>> Long-term timing would seem to be the closest thing
>> to what I am asking about, e.g. audio synchronization
>
> If you are concerned about ability to sync audio
> and video on separate recorders, the easiest way
> to check would be to just run you own experiment.
> If you want a more specific answwer, need some
> details, etc.
>
> My experience is that modern consumer and pro
> equipment with mass-market, non-precision crystals
> can hold sync remarkably well. Where I define
> "remarkably well" as: I would have noconcerns about
> shooting a 10-minute segment. Even longer is quite
> managable by slipping the video a few frames against
> the reference audio track in your favorite NLE. This is
> a semi-regular topic around here. Searching the GG
> archives may be instructive.
My concern is that the generator is not keeping very
good timing so the audio begins to lag over the course
of a couple of hours recording. AFIK there is no time
sync on the audio, just on the video.
Navigation:
[Reply to this message]
|