Navigating through a 55 GB avi file ?

[iparout]

Hi there.

I just finished capturing 43 minutes of footage off my VCR using VDub. The output file is 55 GB in size YUY2 704x576. I deliberately captured to uncompressed cause I want to do some slight video editing with Premiere and then encode to VCD with TMPGEnc.

I would like to know how it is possiblt to navigate through such a huge file. Premiere or VDub crash when I slide the scroll bar to the point where I want to edit. What I want to do is ad a fade out effect at the end of the clip and that's it.

I tried to shorten te work area and render only the last minute of the clip but Premiere would not render it either. The only solution is render the whole clip, but it takes 4 hours.

Any solutions on how to navigate easier through that file ?

I think that if VDub creates some keyframes while capturing, the output avi will be easier to navigate. Do you know how to add keyframes while capturing ?

Thanks in advance.

[Sciascia]

Uncompressed video should have a keyframe for every frame.

If I was to try it, I would open the avi in VDub, save an avi of just teh part to be edited. Open it in Premiere, perform the edit then use VDub to put the two back together. Only problem is that you may end up with 100G of avi files...that is a lot.

Personally for such a long capture these are the steps I would have taken. Take them for what they are worth.

1. Capture using MJPEG, either PicVideo or Matrox HW.

2. Edited using source compression so that it is not re-encoded. ulead is best for this.

3. Opened the clip in V-Dub with these filters:

--resize to VCD specs
--Temporal cleaner
--2D cleaner
--Smart deinterlace

4. Frameserved to my encoder using a VCD template.

Only reason being that uncompressed video is not really that much better if you get a good clean capture to begin with, when you compare it with a quality/filesize ratio. For intensive effects or multiple effects/layers it is better, but for regular editing it is not that much of an advantage. The key to a good final product with MPEG is to have a good clean source since any noise is detected as active video and will suck up bandwidth from your stream that could be used for actual picture info. That is why I use the filters in VDub. They really do make all of the difference in the world when feeding an encoder. Smart deinteralce is a really strange filter in some people's opinion, but it works miracels for me. I figure that the encoder can decide how to create the scanlines. VCD is Progressive, so i t shouldn't really matter.

Hope this makes sense, I am exhausted.

[Technoid]

And I would have used Huf....

[iparout]

no keyframes

Thanks for the replies guys...

Now the real question is : Why are there *NO* keyframes in my captured video ?!?

I checked the file with Premiere and VDub and there are no keyframes at all, but there are 69277 delta frames.

I also thought that in uncompressed format, every frame is a keyframe but it appears that this doesn't happen. Any ideas why ?

To what it's worth, I capture using VDub at 704x576 using YUY2 (Matrox). I am sure that under Video ---> Compression I choose Uncompressed (YUY2) while capturing. The field that says "Force keyframes every .... seconds" is greyed out when chosing Uncompressed.

Any help here ?

[Sciascia]

Wow, I am sorry. I thought you used Huff. That is why Ithought you should have keyframes. Told you I was tired! YUY2 is an intermediate format, not really meant to be used to edit, thus no keyframes. Huff or RGB would be better.

[iparout]

HE HE HE... No problem mate... That was a relief... I finally figured out what the problem is...

I will try Huffy or RGB... I think I wil go for RGB cause I want the highest quality possible for editing the video afterwards.

I tried huffy the other day and I wasn't satissfied with the result.

Thanks again.

[Sciascia]

I have had problems with HUFF in the past myself. Just PB problems. I know that it is not a PB format, but the video was just garbled noise. I always preferred MJPEG for editing, but that is just me.