In "All But My Life," the video was shot with an external camera and the result was loaded into Final Cut. The audio was also recorded by my stream software and that's a much better quality audio file because it's captured straight off the mixer.
Therefore, I add the audio-only track between the audio/video track from the mixer and then play Match the Waveforms. It's not so hard if zoom the view enough to see some detail. As you look closer it becomes obvious.
Once you match the waveform, chop out the camera audio and chuck it leaving only the audio-only from the stream in its place but it is now synced with the video.
The Problem
The sync is dead-on perfect at the start of the video but it is visibly off by the end of the song about eight minutes later. Both are digital files and should have been precisely matched and yet they were not.
One very thin idea is that audio/video frames were dropped either in recording on the camera or in the upload into Final Cut. That would change the timing but very slowly as the play would be moving subtly faster in the video than in the audio. The effect would be cumulative and that's what I see in the video but it's not a good enough answer.
Another observation is that I used the same technique to sync the video for the Cincinnati concert and that was perfect. The sync did not decay over time.
There's something shifty happening somewhere so I guess some Sherlock Holmes work is necessary.
You won't notice the sync problem unless you really look for it and it's not until the end.
There's also a bit of a nag that this has something to do with a 29.97 frame rate versus 30 for the audio-only file.
Therefore, I add the audio-only track between the audio/video track from the mixer and then play Match the Waveforms. It's not so hard if zoom the view enough to see some detail. As you look closer it becomes obvious.
Once you match the waveform, chop out the camera audio and chuck it leaving only the audio-only from the stream in its place but it is now synced with the video.
The Problem
The sync is dead-on perfect at the start of the video but it is visibly off by the end of the song about eight minutes later. Both are digital files and should have been precisely matched and yet they were not.
One very thin idea is that audio/video frames were dropped either in recording on the camera or in the upload into Final Cut. That would change the timing but very slowly as the play would be moving subtly faster in the video than in the audio. The effect would be cumulative and that's what I see in the video but it's not a good enough answer.
Another observation is that I used the same technique to sync the video for the Cincinnati concert and that was perfect. The sync did not decay over time.
There's something shifty happening somewhere so I guess some Sherlock Holmes work is necessary.
You won't notice the sync problem unless you really look for it and it's not until the end.
There's also a bit of a nag that this has something to do with a 29.97 frame rate versus 30 for the audio-only file.
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