How to reduce the filesize of iMovie exports.
March 31, 2009 10:51 AM Subscribe
What bit rate should I store (for general viewing) my iMovie videos at?
posted by Glum to Technology (2 answers total)
I shoot home movies on a Flip Mino HD
. I'm no Copolla (as the hardware would suggest) but I enjoy editing my movies together on iMovie, watching them back on my Mac and sharing with friends on YouTube.
The Flip Mino HD is 1280x720 so I export using the Share -> Export using QuickTime
option in iMovie. I have been using H.264, with the resolution and frame set to match the source material. Importantly I left the Data Rate
set to Automatic
and the Compressor Quality
set to best
The results are good, but big. A less than 4 minute clip is resulting in a 681MB MOV file. Now I crunched it down in Handbrake
so that I could upload it to YouTube more easily. I set it to restrict the file size to about 10% of the original size (70MB) which equates to a bit rate of something like 2380kbps. I would say there is very little difference in quality between this MP4 file and the original MOV.
I'm happy to save the massive MOVs to DVD or somewhere for archiving, but is there a rule I can use to determine what data rate to export at for general viewing?