I record a video of my screen in Quicktime. I then open the video in iMovie and do the most basic of edits: cutting portions of the .mov I don't need. The edited file is ~2-3 times bigger than the original Quicktime file. What gives?

So my question is, how do I get iMovie to edit the file without changing the size of it? It can't improve the quality of the Quicktime movie by making the file size bigger, so why does it do this? The Optimization options do not help the situation. Any insight into this is greatly appreciated!

Start '''[https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-using-safe-mode Firefox in Safe Mode]''' {web Link} by holding down the '''<Shift ''(Mac Options)'' >''' key, and then starting Firefox. Is the problem still there?

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LOB segment size is 2 times bigger than the real data

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t1_lob (chunk 2K disable storage in row tablespace smallblock);
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2 for i in 1..1000 loop
3 insert into t1 values (mod(i,5), rpad('*',2000,'*'));
4 end loop;
5 end;
6 /
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BYTES
5242880
What am I missing? Why is LOB segment is being ~2 times bigger than it is required by the data?
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Message was edited by:
Andrei Kübar

thanks for the link, it is good to know such thing is possible. Although I don't really see how can it help me..
But you know, you were right regarding the smaller data amounts. I have tested with 1800 bytes of data and in this case it does fit just right.
But this means that there is 248 bytes wasted (from my, as developer, point of view) per block! But if there is such an overhead, then I must be able to estimate it when designing the data structures. And I don't see anywhere in the docs a single word about such thing.
Moreover, if you use NCLOB type, then only 990 bytes fits into a single 2K chunk. So the overhead might become really huge when you go over to gigabyte amounts...
I have a LOB segment for a nclob type field in a production database, which is 5GB large and it contains only 2,2GB of real data. There is no "deleted" rows in it, I know because I have rebuilt it. So this looks like a total waste of disk space... I must say, I'm quite disappointed with this.
- Andrei

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The best way to find out is to try it. Take a small but representative sample, do some edits, export as H264, then reimport, do some edits, export again.
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jslat,
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This Apple Knowledge Base article may help if you haven't already read it:
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Message was edited by: littleshoulders

I am trying to make a pdf of a file and I need to get the file size to be no bigger than 10MB. What is the best way to do this

I am trying to make a pdf of a file and I need to get the file size to be no bigger than 10MB. Even when I save it, the image quality at minimum the file size is 10.9 MB. What is the best way to do this

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If web purpose, you could convert CMYK images to sRGB. That would reduce the file size as well.
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I record a video of my screen in Quicktime. I then open the video in iMovie and do the most basic of edits: cutting portions of the .mov I don't need. The edited file is ~2-3 times bigger than the original Quicktime file. What gives?

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