John,
I'm curious why this matters to your workflow. Whenever I ask mixers to bounce out a mix, I say head to tail. Their bounce length equals my show length, and there are no questions. Time code doesn't even enter into it at that point. No bars, no pop, none of that matters any more in (most) file based delivery. And if they are needed, I make them - the audio mixer's only concern is that I give them show head to tail, and they give me a mix exactly that. This saves a ton of headaches on both sides. Nobody has to line anything up - the content length is the synchronization parameter.
You can not rely on time code in audio files which has been generated by Pro Tools. If it's a "bounce to disk", the time code is likely either not written or is based on the clock time when the bounce was triggered. The only way Pro Tools will write time code of the timeline into a bounce is if the bounce is done internal, (many tracks routed to a record track and recorded back in). Most mixers aren't doing this anymore because as of a few versions ago, Pro Tools can now do offline bouncing at rates many times faster than real time.
On Mon, Apr 2, 2018 at 10:18 PM, John Moore bigfish@pacbell.net [Editing-List] <Editing-List@yahoogroups.com> wrote:
So out new delivery spec is that program starts at 00:00:00:00 23.976. This puts bars and tone and slate on the other side of midnight. Sort of a pain but it's what they want. The final file will just start at 00:00:00:00 with no bars and slate.Protools spit out wav stems to go with the DPX.. My original sequence in Avid started at 23:59:01:00 to accommodate a 00:00:00:00 start time code. Protools conformed to that timeline. Now the final wave stems if I import them into Avid and tell avid the time code is 23.98 I get a start time code of 23:59:01:00 as I would expect.The curiosity I have if I open one of the wav stems in Wave Agent it lists the Start TC as 00:59:04:16 and Samples since Midnight as 170314145. There is a frame rate that is blank in the Recording Info window. If I set that to 23.97ND the start time doesn't change.If I open the wav stem in QT Pro7 under properties there is a time code track that by default is off. QT lists no frame rate but if I enable the time code track there is a number that appears that looks like the number of samples. It appears just above the timeline bar and reads "170137968. If I click on the time counter the choices are standard and frame. I do not see a choice of time code in the time counter pop up like I usually do.So what is the actual time code associated with these wave files? Avid reads exactly what it should be but why is there a difference in Wave Agent and QT Pro7? I don't usually do much with wavs so I am not playing along very well.Another strange to me thing is in wave agent even though these are mono stems it sees any of the 5.1 stems as interleaved with 6 channels and any of the 2.0 stems as stereo. I assume this has something to do with the default naming conventions out of protools. Does wave agent do some sort of scan of the source folder and find matching wav files based on the file naming convention or is there some under the hood meta data that makes this happen? I've had issue with Avid and wavs when the auto detect poly bwav files option is on. I probably don't have the exact nomenclature right but I recall having to turn that type of function of to bring stems in a mono stems. I can't check on my system right now do to a long DPX export.Any clarification on wav time code and the behavior I'm seeing in Wave agent would be helpful.John Moore Barking Trout Productions Studio City, CA bigfish@pacbell.net
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Posted by: Mark Spano <cutandcover@gmail.com>
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