Audio & Video Software forum

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virtualdub question/problem

i wanted copy the first 1.5 minutes of an avi file to a flash drive to show a friend the graphics

the file is 356M and runs for 48 minutes, so i figured my 1.5 minutes would be about 11-12M

imagine my surprise when it came out at 1.42G!

why did it happen, and how do i prevent it happening again?


jonah "still baffled by modern technology" jones


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Video and Audio Compression.

In reply to: virtualdub question/problem

This is where it gets complicated, and I am already at the limit of my own knowledge. Happy

Whenever you create a new video file, you need to goto VirtualDub's Video and Audio menu commands and select a compression ratio. They are, I believe, based on CoDecs, and the codec you use dictates how much compression there is, and what the file size and playback quality is like.

Its a minefield if you are not used to doing it.


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It appears you transcoded it rather than snipped it.

In reply to: virtualdub question/problem

Try again but be sure to set your codecs proper. Hint: none...

"which is why virtualdub is my tool of choice. It only takes 30 seconds to manually load the file, run the script, and save the results." from the web.

If this takes longer than a few minutes you have the encoding wrong. shows how to use the mark in and mark out. writes... "I just used 1.8.1 and selected a range, set video direct stream copy, and then save AVI. Only the selected range was put in the output file. "

You did use direct stream copy?

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Re: You did use direct stream copy?

In reply to: It appears you transcoded it rather than snipped it.



i was on full processing mode....

i just tried the "correct" way and it went so fast i thought nothing had happened...

thanks Bob and Mark for the minefield warning Wink


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Did nothing happen?

In reply to: Re: You did use direct stream copy?

I use VirtualDub because it's a fine tool. But some can't use it because of a lack of pretty buttons and wizards. Sorry if that sounds cruel or mean in some way but it's sort of the table saw in the shop arsenal. You can hurt yourself badly or knock out a killer job.

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sorry, my mistake

In reply to: Did nothing happen?

i just tried the "correct" way and it went so fast i thought nothing had happened...when in actual fact, it had edited and saved a 16.2M in split seconds

sorry for the 'confusion'


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Ahh. Got it.

In reply to: sorry, my mistake

So no trip to the emergency room today. I bet you'll find out just what else this program does as time goes on. Just like the table saw those filters make fast work on many odd jobs.

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