![]() ![]() In addition, your iMovie export with best quality (pro res) settings is exporting your original. The different codecs and formats may render slightly differently when exported. Maybe some have different frame rates as well. mov clips can contain different codecs from each other as well. MOV file.Ĭan I ask how should I go about resolving this?Ĭombining media from different cameras, and audio with different sample rates, plus different video formats, can cause sync issues. The audio has been trimmed here and there in iMovie to cut out small parts, but always lined up manually as close as possible to the video, and as I mentioned there is no noticeable lag anywhere in the iMovie preview, but it only becomes apparent in the exported. MP4 clips, and maybe a tiny number of the. I've read elsewhere that the difference between 44.1kHz in the audio and 48kHz from the video could cause this problem, but the strange thing is that I'm only seeing this happen with some clips and not others (mostly with the. MOV file additionally says 'Timecode' within the Codecs section, and has an additional section saying 'Colour profile: HD (1-1-1)' ![]() On the 'Get Info' for each type of file, both the. mov, under better quality compression, 720p (as this gives 26GB file), I noticed some of the shots are slightly out of sync with the audio, and only in the exported file. I've been lining up the audio to the video manually between edited shots, and it looks like everything is in sync within the iMovie preview playback. MOV), and audio mostly from a separate recording device (.WAV). It uses video from two different cameras (one gives. It might just be that 6-7 hours is what it takes to render this particular video.I've been editing a 1hr video using iMovie. If not successful, drag your present iMovie app out of the trash (if you moved it there) and return it to the Applications folder. You will see your purchases displayed, including iMovie 10. Sign in to the app store and open your purchases folder by clicking on your name at the bottom of the app store side bar. IMovie 10 app from the Applications folder into the trash, but do not empty the trash. If nothing seems to be solving this, try redownloading iMovie and see if that helps: To update/redownload iMovie 10, drag your Try resetting the System Management Controller: Resetting the System Management Controller Copy your project into it and try sharing out from there. Try creating a new iMovie library by opening iMovie while holding down the Option key and choosing to create a new library from the box that appears. Then see if the rendering speed is faster. Immediately shut down and reboot in normal mode. You could also try booting up in Safe Mode (see Finder menu for instructions) and, after everything loads, That, do an Edit/Select All, Edit/Copy, of the media in your project and then Edit/Paste it into the newly created project. Reopen your old library to get back to your projects.Īnother thing you can try is to copy your media into a newly created project and see if that cures the problem. Try opening iMovie while holding down the Option and Command keys and selecting to delete preferences in the box thatĪppears. It might be helpful to try some troubleshooting steps. Try rendering some shorter test movies in different projects and see if the rendering is unusually slow there, too. Although this is not your situation, the Best Quality (pro res) export setting can result in 4x rendering time. High frame rates and high resolution can cause slower rendering times. What format and frame rate are the clips themselves? How large is your iMovie library? How much free space to you have on your internal and destination drive.Īs has been said on this forum, poor iMovie responsiveness can be caused by insufficient RAM, slow or almost full disk drives, other applications using resources as well as low-end processors and video cards. If 6-7 hours is just the estimated rendering time, those can be very inaccurate, and the actual rendering time usually is much faster. Rendering is a very computer intensive process and so rendering times can sometimes be longer than expected. Not sure how unusual that is, as several posters on this forum have from time to time complained of slow rendering times. A rendering time of 6-7 hours does sound slow for a 1 hour 20 min video with no editing. ![]()
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