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Audio TC frame rate
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Well, there’s a lot of different frame rates going on. If the audio was recorded at 30fps and you converted it to 23.98 through a secondary program then perhaps FCP isn’t liking the conversion or something. If it works without trouble in Avid, I’d recommend that, but since you mentioned you don’t want to jump into Avid for this, you could try the retime tool to fix the drift. It’s not ideal, but I’m not sure what else you can do inside X.
Andy
https://www.timesavertutorials.com
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I can’t retime, I’m a perfectionist.
I’m recutting it unless someone can provide a solution. Because the 23.98 footage was recorded 30 ND too, I can’t trust that it isn’t off. Wish I caught this earlier but all the 24fps shots are at the end of the film, these are the ones really out of sync.
Apple needs to add something like in Avid where audio frame rate is set on import. I’m a little annoyed because everything I’ve read on forums has stated it automatically converts video and audio frame rates for you based on the frame rate of your project settings. Clearly that is not the case.
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[james Lackleter] “I’m a little annoyed because everything I’ve read on forums has stated it automatically converts video and audio frame rates for you based on the frame rate of your project settings.”
It does in the sequence, but if you’re synchronizing video and double system sound, then maybe it’s not working properly because of the frame rate differences. If the sync drift is occurring in the project timeline, then I feel like there’s something else causing it. Typically FCPX has no problem adjusting pulldown for clips not of the same frame rate of the project. But I’ve had issues with some audio recorded in some programs (mostly screen capture programs) where sync drifts over long periods and even when corrected in the sequence with the retime tool, the export will still contain drift. I wonder if you’re having a problem similar to that.
Andy
https://www.timesavertutorials.com
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Oh, hey though. Something else just occurred. I was having an audio glitch in a multiclip the other night and the issue was with my OS user settings. When I created a new user and viewed the project, the problem went away. It can’t hurt to try that, just to make sure.
Andy
https://www.timesavertutorials.com
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[james Lackleter] “Audio at 24 fps, and video at 23.98 syncs.
Audio at 24 fps and video at 24 fps does not.
“James
It react this way because there cannot be Frames per Second in an audio file, (there are no frames) while there can be timecode, audio files captured as Dual System Sound independent from the camera would match the the camera frame regardless of how the audio was recorded (actually had this happen with a 25P camera and 29.97 tc on the audio)
In the tape era, audio was recorded in ft and inches, in a digital world while we give the audio TC in actuality many of the audio formats do not support a time code track to reduce bleed / crosstalk.
Audio records in minutes and seconds, not FPS and that is why the 2 match.
gary adcock
Studio37Post and Production Workflow Consultant
Production and Post Stereographer
Chicago, ILFollow my blog at https://www.garyadcock.com
Or follow me on Twitter
@garyadcock -
Yes audio is not video but it does FPS for playback. With your logic I can record 48000 samplerate and play it back with 240 fps video and it will match.
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[james Lackleter] “Yes audio is not video but it does FPS for playback. With your logic I can record 48000 samplerate and play it back with 240 fps video and it will match.
“No that is not correct- Audio does not record in FPS and never has. Audio on early dual sound recording was done on Nagra style tape decks that recorded the files in ft and inches. Later using minutes and seconds as the metric.
While there may be timecode associated with the audio, there is not any frame indicators on any audio file that I know of.
gary adcock
Studio37Post and Production Workflow Consultant
Production and Post Stereographer
Chicago, ILFollow my blog at https://www.garyadcock.com
Or follow me on Twitter
@garyadcock -
Yes I see what you mean about the playback. As long as playback is 23.98 there’s no way I’m going to get around resampling, but it’s so minuscule I don’t think it’ll matter.
I guess what’s confusing is me is the amount of people saying playback is affected by FPS TC inside Final Cut, based on my tests it’s not. I’m going to to start a new thread on this because there’s too many threads on the internet stating both that it does and does not.
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Oh and thanks for help guys. As of know i can only resample, or change the framerate of project to 24 to fix. I’m not changing project rate because most of the footage is 23.98
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[james Lackleter] “I guess what’s confusing is me is the amount of people saying playback is affected by FPS TC inside Final Cut, based on my tests it’s not.”
Lots of people mistake the issue and even more are only regurgitating information that may not directly pertain to your issue.
A good deal of the info online also relates to various versions of FCP, there are differing responses to this issue in the early builds of FCPX and don’t forget that FCP7 was horrendous for retiming things without your knowledge if you were not using a PCIe Video card to force timing to a SMPTE clock.
This was none of those. It was a mis-matched acquisition and as long as they were recorded on separate unconnected devices you were ok, as you found out.
Glad that it worked for you.
gary adcock
Studio37Post and Production Workflow Consultant
Production and Post Stereographer
Chicago, ILFollow my blog at https://www.garyadcock.com
Or follow me on Twitter
@garyadcock
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