1186 Views 3 Replies Latest reply: Feb 1, 2011 8:21 PM by IlMolto
iMovie will recompress.
If you cannot tell the difference, then keep doing what you are doing.
For a slightly better workflow, convert your uncompressed video to Apple Intermediate Codec. This will be much smaller than uncompressed but 4 to 10 times larger than h.264. Then when you export to h.264, you will have more to work with and get better performance.
Interesting. I will keep that in mind. Thanks for the info.
I did some more tests regarding the exporting an already exported video and it seems there is some loss of quality, mainly in the colour. It appears brighter and more washed out if you know what I mean. I guess the less times you compress, the better.
Thanks again, AppleMan
Hi again AppleMan,
When optimizing a video, will iMovie use the optimized video when exporting, or the original? I feel iMovie runs a lot better when the video is optimized. It scrubs better and plays the video nice and smooth, even when creating a picture-in-picture effect. The question is though, what does it refer to when exporting? As you know, the original files are uncompressed 8-bit YUV. There's a lot more in these files than the Apple Intermediate Codec (which still has a lot in them), but would obviously rather export using the bit rate in the uncompressed files.