Playback at 80% Speed and Quality Loss

skullsession wrote on 5/7/2004, 5:24 PM
A few of you guys here have been quite a help as I lurked these forums, but I need your advice on a topic that I've not seen discussed.

I'm working on my first video project...a video for a rock band... What I did when I shot this thing was I sped up the song to 120% of the original and the band "acted" to the music at that speed. As I edited the project, I slowed the video down to 80% speed so that it would match up to the original audio track.

This all worked great...gives me the effect I was after. Everything seems to be in "slow motion", yet moves in time to the music. BUT...I can't seem to get my DVD to look as "clear" as I'd expect. Granted, the look on my computer is a bit "grainy", but it's really turns crappy on DVD/TV. It's very "fuzzy" or "blurry" on my TV.

I guess my question is....does my slowing down the video speed by 20% cause pixelation that would otherwise not be seen after render? Or...is my problem related to the fact that I'm not using any of the Broadcast Color correction? Is the Broadcast Color correction something that I should be using automatically during render?

Camera: Sony DCR-TRV 19
Input: Firewire card
Rendered to: MPEG 2 in Vegas 4

Thanks for your help..in advance!!

Comments

Hunter wrote on 5/7/2004, 5:55 PM
First, I would loved to seen the band acting at 120% bet it was pretty funny.
Second when you slow the clip Vegas will re-sample, right click the clip and choose not to re-sample and see what happens. Render a small section (15 sec.) before you do the whole project.
Third, what cool idea, were did you get the idea?

Hunter
TheHappyFriar wrote on 5/7/2004, 7:46 PM
4th (to add to hunter) add some motion blur. That will help (but will add a lot to the render time).
MUTTLEY wrote on 5/7/2004, 8:18 PM
I'm bummed they did not put in an option to change the default of " Smart Resample ". Annoying as hell. If they did and I missed it, please let me know, I'd be giddy as a school girl.

- Ray

www.undergroundplanet.com
BillyBoy wrote on 5/7/2004, 10:26 PM
Right click on the timeline of your vid. In version 5 there are choices for smart, forced and no resample. Version 4 did it a little different, you still right click to get the options.
MUTTLEY wrote on 5/8/2004, 12:18 AM
Not sure I'm following ya BillyBoy . I know that if you right click on a media file on the timeline and choose properties you can change it there. Is there somewhere else where you can change it for either the entire video or at least track ?

- Ray

www.undergroundplanet.com
SonyEPM wrote on 5/8/2004, 9:03 AM
Muttley: You can map event.edit.DisableResample to any keyboard key you want. Select events, press the key...done.
johnmeyer wrote on 5/8/2004, 10:32 AM
If I understand what you did, you sped up to 120%, then rendered that, then took the result and slowed it down to the original speed, and use your original music track.

You might get what you are looking for, all in one step, and without the blurring, by clicking on the event and then setting the undersample rate to something between 0.5 and 0.8.
skullsession wrote on 5/8/2004, 4:02 PM
No...the band "played" their instruments to a music track that was actually 20% faster than the original. Sort of had that "Chipmunks" feel and sound to it. (They hated that...but got used to it after about half an hour.)

The video was captured and then slowed down to 80% and married up to the original music track that was playing at normal speed. Think about this...if you were to jump really high and lip sync to a song that is playing at 120% speed, your jump may last a total of 4 beats. If you slow that down to match a song that is actual speed, the jump you made still only lasts 4 beats, but the duration of the jump just increased by 20%. Sort of like if Superman were to lip sync...it looks physically impossible to stay in the air that long without wires. The band is moving and singing in time to the music, but they take on a "larger than life" quality. The faster you can get the band to play, the better this effect is when you slow it down to match the original audio track.

No speed changes were made after rendering.

I have to thank you guys for trying to help me with a problem that turned out to not be a problem after all. Last night I went to Sam's club. They had this huge display of TV's there...all running the same video. I found the DVD player they were using to feed all of the TV's. Looked around....pushed stop....put in my DVD....and hit play. That was pretty cool to see it on about 10 TVs at the same time!!

Anyway...it appears that the problem is my TV in my house. It's a 55" projection....and it just doesn't look the same as it did on every TV I played it on last night at Sams Club and Best Buy. Is this a normal problem?

I guess my answer is to either buy an extra TV for checking this stuff, or I just hop in the car and visit the department stores!!

Thanks, guys!!
RedEyeRob wrote on 5/8/2004, 8:35 PM
Slow mo DOES affect the quality of the video. It does become more blurry. You can offset that a bit by applying the sharpen filter to whatever degree works best.
Hunter wrote on 5/9/2004, 12:50 PM
Last night I went to Sam's club

Guerilla previewing ... LOL

Ok raise your hand if you've done this .....
<hand up>