Anyone know what the calculation is...

  • Thread starter Thread starter Blue Bear Sound
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Blue Bear Sound

Blue Bear Sound

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...to convert seconds/milliseconds into frames?

(as in time in hh:mm:ss:mS to hh:mm:ss:frames:subf:smpl such as on the BRC display)
 
won't the conversion change depending on the frame rate? 24, 29.97, 30 , drop, non drop?
 
Yep, it's frame rate dependent. If you're in a strictly audio environment (i.e. no video sync) 30fps is probably the most common, and that's 33.3333 milliseconds per frame. Just devide 1000 by the frame rate to get milliseconds per frame.

Scott
 
Sorry - yes - I meant at 30fps.... (strictly audio)

Thanks Scott, for clarifying... and what about the subframes:samples component?
 
All of my audio stuff resolves to 1/4 frame resolution using SMPTE. At 30fps that gives me a maximum potential offset of 8.33ms. In practical use this hasn't been a problem - as long as I don't split a stereo signal between 2 devices. There are sample accurate sync protocols (ADAT sync, for one) but they have to be implimented (in hardware) by the devices you're syncing.


Scott
 
what I'm actually trying to do is correlate the hh:mm:ss:msecs readings in Cubase to the hh:mm:ss:frm:subfrm:samples readings on the BRC.... it is sample-accurate from the perspective that ADAT sync is used throughout the transfer chain (RME Hammferfall card).
 
If it's 33.3333 milliseconds per subframe then how many samples does it give you per subframe? Divide that into 33.3333 and that should be the MS value per sample.

What a pain in the ass. Can't you change the clock display in Nuendo to match the format on the BRC?
 
Yo Bear of the Blue:]

Just got off the golf course and I used the same formula to add up my score and I won the front, back and total.

How come you don't ask any questions that I can answer?

Green Hornet
:D :p :p :p :p
 
So, Blue Bear, do you have your answer, or do you still need help?
 
TexRoadkill said:
What a pain in the ass. Can't you change the clock display in Nuendo to match the format on the BRC?
Click to expand...
That's what I looked for first, but it didn't seem to be an option! You're right - something so simple shouldn't be such a pain in the ass!


DonF said:
So, Blue Bear, do you have your answer, or do you still need help?
Click to expand...
I don't have the exact answer (ie - how to convert directly)

But at least I better understand the frames/subframes/samples section of the timecode reading thanks to you guys!


In the end I simply manually set the punch point as it was playing in sync. I just thought it would be so simple for me to read the timecode off of the s/w - and punch the numbers up at the BRC.... obviously, it's not quite that easy, although there's absolutely no reason in the world it SHOULDN'T be!!!! ;)
 
Bear, It probably wouldn't be that hard to setup an excel spreadsheet to do the conversion. I'm going home soon but I might give that a try tomorrow just for kicks.
 
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