Various timing anomalies have shown in some of my videos and it's due to synchronization between video with an audio track and audio which is recorded independently. Video is recorded with time code but audio is not and this results in sync problems.
The most immediate fix in Final Cut Pro is to select two (or more?) clips in the browser and then CTRL click them to get the option to Synchronize them. This way will work and I'm satisfied with a validation I've just done of the accuracy. There is a drawback as the audio tracks from each source will be mixed to make a compound clip but that that mix can be weighted by changing the volume for a clip in its audio properties.
Note: post-process audio effects cannot be added until the clip is in the Timeline and therefore can't be used before the clips are synchronized. See below for more on that.
The reason the volumes are important in my application is I want the audio from the camera for synchronization purposes but it's a low secondary relative to the audio captured by direct recording from the mixer (i.e. no video). With the volume of the camera audio dropped low in the properties for the clip, it becomes generally transparent in the mix with the captured audio.
Another option for syncing audio is manually through observation of the waveforms and it's not terribly difficult so long as there is are any dynamics to the content of it. Regrettably, it's not terribly accurate either as sync will be lost over time to the point of being clearly noticeable after ten minutes.
The pending question at the Rockhouse is whether clips can be synchronized after they are added to the Timeline as this would permit bringing post-process audio effects to an individual clip before the sync.
Synchronization is a long-standing problem and the progress today is excellent for that. The perfect solution (i.e. sync in the Timeline) is not discovered yet but this one is damn good.
One outstanding consideration is what happens in synchronizing multiple video clips. If all of those mix into a single synchronized compound clip then it seems it should end up like the Pig Lizard in "Galactic Quest" (i.e. inside-out and all over the transporter room).
None of this is nit-picking as I'm seeing the video before it gets to you and it's not that I have some superior eye but rather I know it reaches a point at which there's no doubt you will see it's off. Therefore, fix it or don't upload it. Our eyes and our thinking have high sensitivity to sync problems and only a small discrepancy will get your attention. So the attention to this is worthwhile ... and it's even working.
The most immediate fix in Final Cut Pro is to select two (or more?) clips in the browser and then CTRL click them to get the option to Synchronize them. This way will work and I'm satisfied with a validation I've just done of the accuracy. There is a drawback as the audio tracks from each source will be mixed to make a compound clip but that that mix can be weighted by changing the volume for a clip in its audio properties.
Note: post-process audio effects cannot be added until the clip is in the Timeline and therefore can't be used before the clips are synchronized. See below for more on that.
The reason the volumes are important in my application is I want the audio from the camera for synchronization purposes but it's a low secondary relative to the audio captured by direct recording from the mixer (i.e. no video). With the volume of the camera audio dropped low in the properties for the clip, it becomes generally transparent in the mix with the captured audio.
Another option for syncing audio is manually through observation of the waveforms and it's not terribly difficult so long as there is are any dynamics to the content of it. Regrettably, it's not terribly accurate either as sync will be lost over time to the point of being clearly noticeable after ten minutes.
The pending question at the Rockhouse is whether clips can be synchronized after they are added to the Timeline as this would permit bringing post-process audio effects to an individual clip before the sync.
Synchronization is a long-standing problem and the progress today is excellent for that. The perfect solution (i.e. sync in the Timeline) is not discovered yet but this one is damn good.
One outstanding consideration is what happens in synchronizing multiple video clips. If all of those mix into a single synchronized compound clip then it seems it should end up like the Pig Lizard in "Galactic Quest" (i.e. inside-out and all over the transporter room).
None of this is nit-picking as I'm seeing the video before it gets to you and it's not that I have some superior eye but rather I know it reaches a point at which there's no doubt you will see it's off. Therefore, fix it or don't upload it. Our eyes and our thinking have high sensitivity to sync problems and only a small discrepancy will get your attention. So the attention to this is worthwhile ... and it's even working.
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