Summary: Let's find out how to import and edit H.264 video files
in iMovie on Mac (Mavericks and Mountain Lion included), here we can
easily fix it.
Q: “For some reason iMovie '11 won't let me import videos.
Specifically, I'm trying to add H.264/MP4 files that I copied to my hard
drive from my GoPro HD 960. For GoPro users, I used the R2 (720p)
format. They open properly in QuickTime and VLC but can't be imported
into iMovie (or iPhoto).”
To edit your H.264 video clips on Mac OS X, iMovie could be your
good choice. But what if you have some H.264 video files which are
unrecognizable by iMovie like the above user? In fact, that's a common
problem. Besides GoPro H.264(mp4), Canon EOS H.264(.mov), Nikon DSLR
H.264(.mov) footage or some other source also can’t supported by iMovie.
The article is the very one working on the H.264 to iMovie Mac conversion.
Since iMovie most compatible format is Apple InterMediate Codec, the
quick workaround is to use the easy-to-use yet professional app called Brorosft Video Converter for Mac,
which can be used as a H.264 to iMovie Converter under OS X Leopard
(10.5), Snow Leopard (10.6), Lion (10.7), Mountain Lion (10.8). It is
free, clean and safe to install and use. With it, you can effortlessly
transcode H.264 to AIC MOV, ProRes, DNxHD for iMovie, Final Cut Pro
(6/7/X), Avid, etc editing with best results. And it works well and
converts flawlessly. Below is how.
Import H.264 files into the iMovie program
Step 1: Download, install the top H.264 video converter to your Mac, import the H.264 recordings to the program.
Step 2: You can directly choose the preset for iMovie which
has been supplied by the Mac Converter. The setting works for iMovie
'08, iMovie '09, iMovie '11, and iMovie HD. Moreover, the Mac program
has some simple edit functions like cropping, splitting, adding effects
etc
Tips: Adjust the video and audio parameters, including the
Bitrate of Video&Audio, Video Size, Sample Rate, Frame Rate, Audio
Channels, etc., by clicking the Settings button on the main interface
for getting the best quality.
Step 3: Click convert button to convert H.264 clips to AIC for iMovie under Mac OS X with this best
Mac H.264 Video Converter.
After the conversion, click the "Open" button to locate converted
files, now you can effortlessly import your converted H.264 video files
to iMovie 08/09/11 for further editing.
Additional Tip: To import videos to iMovie, you can:
1. Go to "File"> "import">"Movies"
2. Drag media file directly to the left zone in the iMovie main interface
Source: iMovie won’t import H.264 files- Quick fix
[quote] lauralily10.tumblr.com/post/77150767889/imovie-h-264-video-importing-h-264-video-to-imovie [/quote]