Reason the more that you have to insist on it.
The point is, 2-pop doesn’t help with any sync issues. See my other message above. I don’t see how adding a 2-pop is going to help.
Mind me saying, you are wrong about that.
A 2pop is lined up with a white video frame @ 48frames before picture start and –ideally- 48 frames after the last frame.
So you always have a proper reference of audio vs. video.
When working with multiple people/studios on a project (Composer/sound designer/Foley studio/Remote Post-Sync/ADR) a 2pop is indispensable.
If there is one thing that is unreliable, then it is video length.
One editor delivers video from first frame, another one leaves a few seconds of black, etc … You can’t possibly know.
What if the picture starts with a few seconds black, or a fade in?
How can you possibly know where the first frame is? How many library music tracks have you seen which have a half- or whole- second of silence at the start, so that the music starts later than the video. That is what video editors do.
They are unreliable, and so is the reference audio that is included in the videotrack.
Logo’s, reference tones, countdowns, start- and end credits are added long after the final lock of the picture edit.
The Colorgrading and VFX people are also sending out video’s to different persons.
And most likely, these versions will not have the same length, because Titles, Opening Sequences, closing credits and other stuff is worked on by other people. And yes, someone will give instructions to another person using “another” video edit than yours.
So at one point many different versions of the “locked” video are circulating.
Just a month ago, I worked on a movie where the director has made a cue list for the composer using a video (without BITC) where a 5 second Billboard was added at the start. The composer was working on the same video as we had. (and has added a 2pop)
The poor man has composed his complete score to cues which were 5 seconds off.
I can go on for a while if you want…
So, please don’t tell me that BITC and 2pops are of no use.