Slow motion clip editing - How To?

dfdpiper · Post by **dfdpiper** » Tue Mar 23, 2010 4:05 pm

Hi, all.

My first of, I'm sure, many questions....

I have a 30 second clip of some activity that I need to edit a protion of to produce a slow motion effect for only 4 seconds in the middle of the clip. Is there an easy way to do this or do I have to cut out the section to be slowed and then insert it back into the clip at the proper start point?

The finished clip should look like normal motion, then slow, then resume at normal speed.

I can do the "cut, edit, paste" routine, but was hoping there would be an easier way.

Any insight would be appreciated.

The original is an AVI clip captured from old VHS.

Bob

Black Lab · Post by **Black Lab** » Tue Mar 23, 2010 5:33 pm

You simply cut the clip at the point where you want the slo-mo to begin, and again where you want it to end. So now you have 3 clips - the one before the first cut, one between the cuts, and one following the second cut. The first and third clips you will leave as is. For the second clip you will click on it to select it, then either right click and choose Playback Speed, or choose Playback Speed from the Edit tab, and adjust the speed.

dfdpiper · Post by **dfdpiper** » Tue Mar 23, 2010 6:48 pm

Thanks, Jeff.

Couldn't find that in the Help. You've saved my day!

Bob

ByronK · Post by **ByronK** » Fri Mar 26, 2010 7:36 pm

One of the main reasons I purchased X3 is, it's the only program that I've found that can handle my 1080p 60fps AVCHD videos well and it makes beautiful slow motions. (;

nosnoop · Post by **nosnoop** » Sat Mar 27, 2010 9:51 am

ByronK wrote:One of the main reasons I purchased X3 is, it's the only program that I've found that can handle my 1080p 60fps AVCHD videos well and it makes beautiful slow motions. (;

Hi, so you have successfully slowed it to 50% at 30fps?
I could not do it with X2 without any glitches. I have major problems with my 720p 60fps video from my GoPro HD using X2.

Post by **Ken Berry** » Sat Mar 27, 2010 12:44 pm

Excuse me, but who said this:

Hi, so you have successfully slowed it to 50% at 30fps?

No one, as far as I can see...

If you have a problem, then give us the details and maybe someone might be able to help. And if you have a camera or camcorder which films video in 1280 x 720p format, then yes, X2 could not handle it, but apparently X3 can handle various versions of that format...

Chromenut · Post by **Chromenut** » Sat Mar 27, 2010 5:31 pm

I have some old WWII newsreel releases that I upped to 1280x720p and converted to HD so that I could up them onto a bluray disc. Out of curiosity, from your question, I took sections of the aircraft flyby's and slowed them to 50% in the HD format, was really wow'ed by how clean the slo-mo was. I love X3 Vid!! Couldn't believe how easy it was to slo-mo a section of a 720p file. Now I gotta try this on 1080p and see how well that works...

Oh, by the way, use the "markers" to mark your sections to edit before you cut in-place. Makes it easier to identify your start and end for the section you are going to cut. Just my suggestion, I use the heck out of those markers now.

Chromenut · Post by **Chromenut** » Sat Mar 27, 2010 5:46 pm

Just because you got me really curious, I went back to a news story I filmed for Fox News Rising a couple weeks ago, pulled the 720p file and wandered through it. Was an Irish Dance group, I shot in both 1080 and 720. So pulled the 720 reel and cut a clip and slowed it to 50%. Exactly doubles the length of the clip but stays at the fps you have it shot at. My camera (not sure why) shoots at 29.97fps, and I have it dogged down for this shoot as I didn't need true HD but shot in 720p anyway. Was way too sunny for a good shot at 1080p, but that's neither here nor there. You made me curious, so I pulled a clip I knew would be in the format you speak of and regardless of the playback speed setting, it retains the original frame rate. I REALLY like that!

Here's a snip of the properties taken directly from the edited clip:

Bob, thanks for your question. Every time someone asks something like this it gives me an excuse to go try something in X3. If you have any troubles, drop us a note here, great place to get answers.

Now I gotta go pull a sports file at 60 and see how well it handles that!

ByronK · Post by **ByronK** » Sat Mar 27, 2010 8:46 pm

nosnoop wrote:Hi, so you have successfully slowed it to 50% at 30fps?
I could not do it with X2 without any glitches. I have major problems with my 720p 60fps video from my GoPro HD using X2.

Yes! (:
I also use Vegas Pro 9C/64bit and it cant do this as well as X3.

The only problem I've run into is after X3 renders the 1080p clip and autoplays, the program hangs real bad and I have to kill the app. I have to remember to save the project before rendering, go to properties and turn off "playback after render" every time. Sent a problem report to Corel Tech weeks ago but NEVER received a response. Hmmm.

Btw, I'm new to the forum and decided to go with X3 for the additional features like built in stabilization feature, animated drawing and the ability to handle my 1080p AVCHD via auto proxy. IMHO X3 is a great program with lots of features for the price.

Chromenut · Post by **Chromenut** » Sat Mar 27, 2010 10:07 pm

ByronK wrote:before rendering, go to properties and turn off "playback after render" every time.

Well Byron thanks for that tip, I'd wondered what glitch was hanging me up every once in a while. I had turned off the play after setting about a week ago and hadn't realized I'd not had the glitch occur since then. Good find.

Black Lab · Post by **Black Lab** » Sat Mar 27, 2010 10:22 pm

My camera (not sure why) shoots at 29.97fps, and I have it dogged down for this shoot as I didn't need true HD but shot in 720p anyway.

You made me curious, so I pulled a clip I knew would be in the format you speak of and regardless of the playback speed setting, it retains the original frame rate. I REALLY like that!

Your cam shoots 29.97 fps because it is an NTSC cam and that is the standard format for NTSC regions (North America in your particular case).

As for retaining the frame rate, playback speed does not alter the frame rate, but only the playback speed. That is why your clip, at 50%, was twice as long.

nosnoop · Post by **nosnoop** » Sat Apr 03, 2010 7:44 pm

ByronK wrote:One of the main reasons I purchased X3 is, it's the only program that I've found that can handle my 1080p 60fps AVCHD videos well and it makes beautiful slow motions. (;

I now have upgraded to X3. It can handle my 720p 60fps MP4/H.264 video fine on editing and rendering.
However, I could not get it to do slow motion smoothly

The main reason for me to shoot at 60fps (59.94) is to change the frame rate to 30fps (29.97) at post processing for very smooth slow motion action.

X3 would double the playback speed when I set it at 50%. But when rendering to final output video, the video would not be smooth - it would stutter like quick panning in slow frame rate video. Tried render to various format like 720p/60fps m2ts, 720p/30fps MP4, AVCHD 1080i etc, all with same results. My system is i7/6GB RAM/Win 7 64.

Now I have to resort to use tsMuxer to change the frame rate of the clip from 59.94 to 29.97fps - very fast transcoding with no re-rendering, and I get very smooth slow motion with original quality. And then I can use this slow motion clip in X3. But this is an unnecessary extra step, which I hope to avoid on using X3.

Any one else has this problems or any suggestions?

Alludo USER to USER Web Board

Slow motion clip editing - How To?

Slow motion clip editing - How To?

Re: does not work well with 720p