File size change

fuzzzzy wrote on 6/7/2002, 1:14 PM
HI,
I apologize for my ignorance but I still have an uneasy feeling about the AVI file size change. I.e. if I stretch a short clip in the timeline and save it back as a DV AVI file it is much larger than the original!

Eg. 1. Original captured DV PAL file =...............................35 Meg
2. Without any editing, saved as DV PAL new size =..............46 Meg
3. Clip stretched in the timeline, saved as DV PAL new size =..126 Meg

My concern is that if I drag a large number of clips into the timeline and by editing, also maybe stretching some of them and then rendering the file back as a DV PAL file it could be nearly twice the original size.

IS it not wise to stretch a clip in the timeline ?

Would really appreciate if someone could give me an explanation!!

Thanks fuzzzzy

Comments

Chienworks wrote on 6/7/2002, 1:29 PM
How much are you stretching it? If you double the length, you will double the rendered file size.
HeeHee wrote on 6/7/2002, 3:53 PM
Like Kelly said by stretching frames you are making a larger file. You are actually adding frames to your clip. Adding frames equals adding size to the rendered file.

What I don't understand is how your rendered file increased in size whne you did nothing to the clip. Did you render out at a higer resolution than the original???
fuzzzzy wrote on 6/7/2002, 5:20 PM
Thanks for the reply :)
No, I captured on PAL DV and rendered in PAL DV, if it's not to much effort please try it on a small clip and see if you get the same results!

I understand from Chienworks reply that one should not stretch the clip during editing...is that correct ?

fuzzzzy
Chienworks wrote on 6/7/2002, 8:00 PM
You should stretch your clip if you want your clip stretched. You should not stretch it if you don't want it stretched. The fact that it will be bigger when you render it is the price you pay for using the effect. Similary, if you "squeezed" a clip so that it played faster and then rendered it to a new file, it would be smaller.

Generally though, you won't be rendering clips to new copies of just those clips. You'll assemble all your clips, cropped, trimmed, crossfaded, stretched, effected, etc into a whole project, then render that to a single new file. This will not affect any of the original files at all. That's the wonderful thing about "non-destructive" editing.