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Sync
I am evaluating the Demo, trying a project in which a band played along faking it to pre recorded mix. Now when I import the video and the original audio, move things so they are in sync at the begining, it doesn’t take long for the video to drift out from the audio. Why does this occur and what can be done about it.
Thanks
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6 Replies
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> Why does this occur…
Because the internal clock on the camera and the internal clock on whatever audio recording device run at slightly different rates. That’s why you pay big bucks for equipment with sync.
> …and what can be done about it.
Split the audio when it starts to drift and move it back in sync. You may even have to stretch it a little. I do this all the time syncing originally recorded music to live performance. Sometimes I have to split every measure and stretch just to keep it in sync. It’s tedious but it works.
~jr
http://www.johnrofrano.com
http://www.vasst.com -
Curious to know if you recorded the original audio along with the musicians or you added that later? When I used to be in the studio we striped the tape with SMPTE code so that all the machines were always in sync and could be triggered. Still miss the those days but would not trade the tools we have today to go back and do it the former way.
Joe -
I have done both. When I record a stage performance, I will take the audio directly from the mixing desk to my Marantz PMD-660. I sync this up with my Sony Z1U camera footage in Vegas and I get about 20 minutes before I have to split the external audio track and resync it; usually just by a frame or two.
I have also added CD music to a performance after the fact where there was only a piano accompaniment that night. Since the pianist was not listening to the CD tempo, I usually have to cut and sync every measure of the song to get them right but the addition of the full orchestra from the CD increases the production value so much that it is worth the effort.
~jr
http://www.johnrofrano.com
http://www.vasst.com -
Thanks John for all the insightful advice. It has been quite a few years for me doing any studio work. I played as well and did most of the other jobs. Owned a lot of my own equipment until the family grew and then I moved. We used MAC in the studio but I used PCs at home and at the time the MAC would read the PC files but not vice versa. Lots has changed since the late eighties. Still do my own tracks and such using Logic Pro but nothing for hire, just fun and to keep my feet wet.
Joe -
Vegas Pro8c will read FCP ProRes files. JK
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Well the band recorded a song, mix and burned it to CD, then mimed to the CD while being video recorded, a direct to dvd hand held camara. I import the video, and the original wav file and sync them at the count in, both visually and auraly. It doesn’ take long to noticebly drift.
Now I have notice in the properties of the video that the audio is at 48 and of course my wav is 44.1 I must add though the pitch is right, everything is in tune.
Life right now is a mystery…
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