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Poor video playback via broadcast output
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It appears that 1 frame is added to the picture head (title generator on primary storyline) only on the exported master file. The burn-in was generated by the TC text generator applied to the project above everything. Not to a compound clip. Inside FCP X, it appears that the TC burn matches the TC display. For all I know, it may be fine inside FCP X, but audio skimming is so goofy and at times so inaccurate that one can never determine sync by viewing inside FCP X. At least not within 1 frame.
Oliver
Oliver Peters Post Production Services, LLC
Orlando, FL
http://www.oliverpeters.com -
[Oliver Peters] “It appears that 1 frame is added to the picture head (title generator on primary storyline)”
I’d be curious if this was doubling a frame or if it is actually adding a previous frame.
I’d also be curious if non generated clip at the beginning solves anything.
Also, cow user Trevor Asquerthian had a sync map to test all kinds of things called “Blits”, but it doesn’t seem to be available anymore (https://forums.creativecow.net/thread/344/8556).
I can upload it for you tomorrow to see if it works for you, as it did work for me, although I haven’t tested FCP 10.0.7
Jeremy
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Here’s a quick test. I re-exported the FCP X project with all filters and connected clips removed (primary storyline only). What appears to be happening is that the first title (a slate) on the primary storyline is being held for an extra frame. This shifts the picture, but not the audio in relationship to the timecode. In the two attached images, you see the first frame of picture in the two exports – with and without burn-in. In the QT7 TC counter, you see that the first frame TC is 1:00:00:01, when it should be 1:00:00:00 if it actually matched the FCP X sequence.
– Oliver
Oliver Peters Post Production Services, LLC
Orlando, FL
http://www.oliverpeters.com -
[Oliver Peters] “In the QT7 TC counter, you see that the first frame TC is 1:00:00:01, when it should be 1:00:00:00 if it actually matched the FCP X sequence.”
Alright, now we have something to test against.
Does this happen on only that Project or every Project?
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I don’t have much media here with me, but I just exported a test and everything lines up as expected.
Picture:
I’ll do more test when I get back to more media.
I am usually pretty strict on checking my tc exports as well, and I have never seen FCPX simply add a frame.
There are subframe edits possible with audio, perhaps take a rally good look at the beginning of your sequence. Something might be shifted?
Are you in 1080p23.976 Project exporting to ProResHQ?
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Just done the same thing, 3 tests, one with a slug at the start, one with a title and one with video.
All were in sync
Steve Connor
‘It’s just my opinion, with an occasional fact thrown in for good measure” -
My suspicion now is that the title generator – as the first item on the primary storyline – is the culprit. Yes, the project is 1080p/23.98 ProResHQ. All timeline clips include 2-ch audio, with one track disabled. No filters or transforms added.
– Oliver
Oliver Peters Post Production Services, LLC
Orlando, FL
http://www.oliverpeters.com -
What Title generator did you use?
Using the same settings it stays in sync when I tested it
Steve Connor
‘It’s just my opinion, with an occasional fact thrown in for good measure” -
It’s definitely the slug/title. I just ran another test and removed slate and gap and started only with the first frame of the first spot and everything is in sync.
– Oliver
Oliver Peters Post Production Services, LLC
Orlando, FL
http://www.oliverpeters.com -
[Steve Connor] “What Title generator did you use?”
Basic Title placed on the primary storyline. FWIW – although the project setting is ProResHQ, nothing is rendered on the timeline. I am exporting a master file as ProResLT.
– Oliver
Oliver Peters Post Production Services, LLC
Orlando, FL
http://www.oliverpeters.com
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