jerky video when exporting from Premiere

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jerky video when exporting from Premiere

Postby TheShaggyFreak » Mon Oct 07, 2002 11:37 am

I've searched through the boards and have tried every setting I can think of. I'm exporting with huffyuv and no matter what I do, the video seems very jerky. I've gone through the turtorials many times as well. Has anyone had this problem and resolved it?
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I think I fixed it

Postby TheShaggyFreak » Mon Oct 07, 2002 12:53 pm

I reripped the VOBs and did it all on my D: drive which is where I do most of my audio/video production work, and I think that somehow fixed the problem. I'm not sure if maybe I did something different or what, but the problem seems to have gone away.
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Postby Zarxrax » Mon Oct 07, 2002 1:33 pm

You need a fairly fast cpu and a fast hard drive in order to play back huffyuv smoothly. A good defrag is one of the best solutions. (Right now my HD is so fragmented, i have a huffyuv file that will play back at like 1fps!)
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Postby TheShaggyFreak » Mon Oct 07, 2002 2:07 pm

It's most likely because my C: drive really has a lot of data on it. My C: Drive is a 30 gig drive that's about 2/3rd full. My D: drive is an 80 gig hard drive that's only maybe 10% full. Plus I believe my D: drive is a bit faster of a drive.
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Postby klinky » Mon Oct 07, 2002 6:47 pm

Take your huffyuv file into virtualdub and convert it to a divx file, then try playing it back :\


huffYUV is strange in that it takes longer to decode then to encode ;p


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Postby RadicalEd0 » Sat Oct 12, 2002 7:09 pm

of course, at 640 x 480 its about 50 mbps running through your video card. That takes sum power :/
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huff avi's

Postby projecto2501 » Mon Oct 14, 2002 12:32 am

Huff avi's send too much data for most PC to handle. Try compressing it. A high bit rate mpg or divix can look almost as good. Also, TMPEGenc has a Mpeg 2 encoder ( time limited demo), so you can reduce the data rate and file size but still have excellent quality.

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Postby klinky » Mon Oct 14, 2002 12:39 am

Actually I believe huffYUV doesn't really have too much data, I think the problem could be that it's more complex then other codecs. Well I guess you could say that there is a massive amount of data.

Usually you'll get a file size reduction of around %33 or so when using HuffYUV. There is still alot of data to be processed and it isn't a simple task of copying it onto the screen. It has to be decoded and then send to the screen. So you have alot of data moving off the hard drive.Which when you access the hard drive that takes some cpu time, so the more hard drive access your use requires the more time it will take. Then you have to decompress all that data, which takes alot of cpu time, and then it has to goto the screen.

So with all those factors it can get slow :\

Your best bet is to use huffYUV as source, and then some lossy codec, like MJPEG or DivX even(provided it doesn't crash :|) for a preview.


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Postby jonmartensen » Mon Oct 14, 2002 1:25 am

Hard drive speed becomes a factor to when you get into the larger files.

I have a question though.


I ripped from a DVD high quality video (huffyuv I believe, followed Ermacs guide) and have edited it in premiere and when I export it in realmedia format it comes out with a good quality and is a reasonable size. Unfortunatly I do not know what setting I should use to export it so that I can use Tmpeg to encode it. I have tried some of the AVI export settings but the ones that do work with tmpeg are of low quality and the DV and high quality AVI files (close to a gig for under 5 minutes worth) will not work with tmpeg. I can't get AVI synth to work either.

I implore someone with knowledge of this (this is my first experience with premiere) to explain how I should export my file from premiere, or if there are any codecs that I need to install.
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Postby klinky » Mon Oct 14, 2002 3:28 am

You would want to export using huffYUV.

Windows uses both Video for Windows(VfW) / Direct Show for displaying video "content". When video plays, what that really is, is a bunch of uncompressed bitmap images going across your screen at the frame rate specified.

Codecs of course convert uncompressed bitmaps into some form of compressed data. Each codec is unique. That's why MS uses VfW/DirectShow for video content. It allows codecs to be installed basically like plugins.

VfW windows looks at the FourCC identifier inside the AVI file, looks in the registry to find the proper codec, and that codecs job is to take the compressed chunk of data and turn it back into a uncompressed bitmap.

The bitmap can then be sent to the screen or can be sent somewhere else like say another codec(this is what happens when you use virtual dub with Full Processing enabled).

So basically the advantage of this all is that you can have a bunch of people code their programs to take advantage of VfW/DirectShow once and then they can use any codec that's installed to get a frame of video.

Okay well that was long winded. Basically TMPEG uses VfW(I believe) & should allow you to import from whatever codecs you have installed. ;p

Also what type of problem are you having with AVISynth. It'd probably be a good idea to start a new thread on that.



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