Problem with reversing, time reducing, then joining two clips.

KittyWaste wrote on 4/5/2003, 7:19 PM
Hi,
I've had a look through the other posts but am not up to speed on the terminology so apologies if anyone has answered this already:

I have about 4 minutes of DivX footage.
I know DivX isn't supported and indeed it was giving me IPF's all over the place so last night I rendered it out as a raw Avi (the footage isn't the best quality so I didn't want to loose any more by compressing the footage). I ended up with two very large Avi files. I'm assuming Vegas split the file in two due to some sort of limit of a single file being no more than 4.2 Gb (I’m on win98se fat32).
No probs, I opened up a new project in Vegas, and pasted the two clips/files into one video track and lined them up. All good. I needed then to get the footage to play backward. Since they were two separate clips I used a velocity event of -100% on both then swapped them over (because if I had two files with frames abc and def then reversed them individually I would get cba fed (not fed cba)
This worked too.
Then i needed to reduce the overall time of the footage to match my audio track by about half.
Every time I grab the right end of the clip and move it to the left it reduces the time but (appears) to discard many many frames from the end, so much so that the two clips no longer match up and there is a big jump in the footage (it's of planets zooming to camera so a lack of continuity is really noticeable).
Stuff I’ve tried:
Grouping the two together (the velocity envelope still splits across the pair)
Reducing the time by grabbing the other end (no change)
Two files as separate video tracks (no change)
Change the speed before reversing (made it worse)


My questions are:
Am I doing something wrong?
Is it just the preview window and it will be fine on render?
Can I splice these two files together in Vegas so they will behave as one?
Should I re-render with compression so the whole file will be less than 4.1 GB thus solving this issue at the expensive of quality?

Hope you can help.

Comments

Tyler.Durden wrote on 4/5/2003, 8:12 PM
Hi KW,

You're mostly there...


If you grab the right edge of "CBA" you might be cutting into C... the looping feature of Vegas permits the file to repeat if the Event is greater than the media. ABC is really ...ABCABCABCABC... in a loop.

SO, if you are at A and drag-trimming it "earlier" you are moving back into C, then B... we're taking about the media, not how it is playing...


Now the question is: do you want the footage to play backwards faster than -100% (-200%)or do you just want the end of the second segment (CBA) cut off?

If you want the first option, you might render to DV at 200%, then reverse it.

If you want to cut off the end of CBA, you might need to cut off the end, then "Slip" the footage in the event to get the frame of C to line up with D.

(See the post about "Pushing earlier..." on displaying TC in the timeline.)


BTW, you will be fine if you render your Divx to DV in Vegas, the SoFo codec has imperceptable loss.


KittyWaste wrote on 4/5/2003, 9:41 PM
ooooo thanks, am going for the first option.