shame that velocity envelope doesn’t keep audio in sync!

[Phil Peacock]

Hi Ed. Rather than the velocity envelope have you tried using the ‘Control’ key and dragging the clip as in time shifting. If you still have video and audio linked this will reduce/extend the play time of both tracks at the same time. Using markers and a separate audio track for your studio audio version it should be pretty easy to achieve what you want I would think.
Sorry if I have your question wrong.

[Eddie Macarthur]

thanks phil. yes, you’re absolutely right that doing it that way does keep the audio/video in sync, but then i’d have to chop the clips into separate sections and run the risk of visible joins or ghostly fades when playing back. I use vasst timewarp when I need to timestretch video because it is vey smooth if i’m dealing with individual clips at a constant rate. the velocity envelope tool is good because the speed control works on a single clip without splitting… ed

System; intel i72600k 3.4GHZ, 16GB RAM, Win 7 64 bit. Vegas Pro 11 latest build, Neat Video 3.01. EVGA GTX460 SC graphics

Stealth Recording Studio, Glasgow, Scotland UK
http://www.stealthrecordingstudio.com

[Stephen Mann]

Why don’t you ctrl drag the studio event to match the video? No chopping or sync problems with the video event. (There are no clips on the timeline – only events).

Steve Mann
MannMade Digital Video
http://www.mmdv.com

[Eddie Macarthur]

could do that. but the backing track is at a set,known, tempo. if I stretched the studio audio to match the video lip movements, it would sound terrible (even when moving things around in milliseconds). i’m mainly an audio producer, so that would be out of the question. the problem is simply that live singers don’t sing a song exactly the same way twice, even when the music is identical. fact of life! so velocity envelope is the only practical way in vegas to smoothly match the video to the “perfect” audio… if only sony would give me the audio matched up, a job like this would be a lot faster. tip for anyone having to do this; put markers at key points where the mouth movement is obvious. place velocity points on and very close before and after the marker. that way you can always check section by section that your sync is good. another way to do this is of course get the singer to re-sing the vocals to picture, dubbing over what they did “live”. have done this before but wasn’t an option in this case. ed

System; intel i72600k 3.4GHZ, 16GB RAM, Win 7 64 bit. Vegas Pro 11 latest build, Neat Video 3.01. EVGA GTX460 SC graphics

Stealth Recording Studio, Glasgow, Scotland UK
http://www.stealthrecordingstudio.com

[Stephen Mann]

Would anyone but you notice the change?

Steve Mann
MannMade Digital Video
http://www.mmdv.com

[Eddie Macarthur]

hi steve. thanks yes, definitely, especially my client. she works with me because i’m very particular about how the end result sounds. video was filmed by others elsewhere (on the island of Cyprus) with sound that was a bit poor… in places I had to blend my studio version with the live sound , (for the audience response)making sync even more important. ed

System; intel i72600k 3.4GHZ, 16GB RAM, Win 7 64 bit. Vegas Pro 11 latest build, Neat Video 3.01. EVGA GTX460 SC graphics

Stealth Recording Studio, Glasgow, Scotland UK
http://www.stealthrecordingstudio.com

[Angelo Mike]

[Eddie Macarthur] “could do that. but the backing track is at a set,known, tempo. if I stretched the studio audio to match the video lip movements, it would sound terrible (even when moving things around in milliseconds). i’m mainly an audio producer, so that would be out of the question. the problem is simply that live singers don’t sing a song exactly the same way twice, even when the music is identical. fact of life! so velocity envelope is the only practical way in vegas to smoothly match the video to the “perfect” audio… if only sony would give me the audio matched up, a job like this would be a lot faster. tip for anyone having to do this; put markers at key points where the mouth movement is obvious. place velocity points on and very close before and after the marker. that way you can always check section by section that your sync is good. another way to do this is of course get the singer to re-sing the vocals to picture, dubbing over what they did “live”. have done this before but wasn’t an option in this case. ed”

I don’t get it. It seems like you’re saying you don’t want to change the speed of the audio at all, but you still want to alter the speed of the video.

How much are you using the velocity envelopes to make changes in the speed?

[Eddie Macarthur]

correct. I don’t want to speed up or change the playback rate of the STUDIO audio. the audio recorded in the studio is at the perfect tempo. I want to change the playback rate of the rate of the live video to match. in the final edit I was having to make micro adjustments, sometimes going down to 80% playback rate for part of a word, then maybe 105% at other times. very fiddly work, but us audio guys are used to dealing with very small time values to get the right feel. vegas does a nice job of controlling the video playback rate. it’s just that when you do it you can’t hear the location video sound following along. if you could, the job would be a lot quicker. and yes, it does make a difference, getting it right 😉

System; intel i72600k 3.4GHZ, 16GB RAM, Win 7 64 bit. Vegas Pro 11 latest build, Neat Video 3.01. EVGA GTX460 SC graphics

Stealth Recording Studio, Glasgow, Scotland UK
http://www.stealthrecordingstudio.com

[Stephen Mann]

I just tried an experiment of compressing or expanding an embedded veg file and the audio does shrink or expand with the video, but when shrinking, there is a lot of data to be discarded so the resulting audio may not sound so good. I don’t know how far (%) I was going but it was about +- 25%.

One thing I’ve noticed in filming professional musicians is that they never play (or sing) the same way twice.

Steve Mann
MannMade Digital Video
http://www.mmdv.com

[Angelo Mike]

[Eddie Macarthur] “correct. I don’t want to speed up or change the playback rate of the STUDIO audio. the audio recorded in the studio is at the perfect tempo. I want to change the playback rate of the rate of the live video to match. in the final edit I was having to make micro adjustments, sometimes going down to 80% playback rate for part of a word, then maybe 105% at other times. very fiddly work, but us audio guys are used to dealing with very small time values to get the right feel. vegas does a nice job of controlling the video playback rate. it’s just that when you do it you can’t hear the location video sound following along. if you could, the job would be a lot quicker. and yes, it does make a difference, getting it right ;-)”

Oh. This is different. If I were doing this for a client, I would have told the client up front that it may be unrealistic to expect this effect. It may be doable, but it’s just going to take a lot of trial and error with velocity envelopes. I wouldn’t agree to do it in the first place.