I sent my friend two 45 mb .mov files to alter in afer effects. after he was done with the first 45 mb clip, he rendered and exported it out and his file is now 1.1 gb. Why did the file become so large? I need his edited footage to be a reasonable size so he can DropBox it and I can put it back into final cut pro. Plesae help!
If you were happy with the quality of your two 45mb source files, what codec and resolution were they? ProRes 422 and ProRes 422 HQ are common choices for intermediate file exchange, but depending on the resolution and duration of the shots, may still be too large to exchange online. If you really want top notch quality, exchange lossless files via real-world storage devices. Until we all have fibre-to-node internet access in our homes and offices, there's still a need for the post office!
Is the codec of the FCP timeline also ProRes LT? You may have better luck making the timeline ProRes 422, exporting the timeline as a quicktime movie -- it will export in the codec of the timeline, ProRes 422 -- and rendering to ProRes 422 in AE.