Move to the point you want your first clip to start, and press "I" to mark an in point.Open your original (large) movie in QT7.You will have to get these on your own as QT7 has been discontinued for years by Apple, but it's very much still out there. Might also require a license key if you don't already have one. Thanks to this post from another forum, I discovered that you can tell QTPro to simply "pass thru" and not re-encode your material, when exporting. Turns out this CAN be done, and simply using QuickTime to boot. Click Save to save the trimmed clip using the same file type and encoding as the source material.Select Pass through for Audio > Audio Format.Select Pass through for Video > Video Format.
Select Movie to MPEG-4 in the Export: selector. Focus the New Player window containing only your trimmed clip. Extract the segment using either Copy CMD C or Cut CMD X.Įxport the trimmed segment using "Pass Through" encoding:. Open your Source video file in QuickTime 7 Pro. It's even easier using QuickTime Player 7 Pro: Extract a Trimmed segment into its own QuickTime player: I posted directions for that here: QuickTime 7 If you do anything more than that, you must export. If you only Trim the video, or (repeatedly) Split and then delete one of the ends, you can re-save as. mov and I don't want to re-encode to mp4 all over again. Quicktime itself seems only able to direct export as. This can be done using QuickTime Player X. Is what I'm looking to do just not possible without commercial software? Is it really so difficult to split one long mp4 into several shorter ones? I keep running into free/open source programs that either are only free in a very limited fashion (like 5 minute max exports, or nasty watermarks, etc.) or that won't run on Mavericks. I then thought maybe iMovie (10.x as I'm on Mavericks), but that's been nothing but headache and appears to decode the entire movie first before working with it anyway. I thought Handbrake could do this, but if it can I can't figure out how. just cut & export without any formatting changes at all. No other edits, no corrections, no effects, no anything. I'd like to just mark the sections I want, and spit them out as standalone. 
I really would prefer to just cut this up without having to decode and re-encode the file(s) all over again. This isn't something I do often so I don't really want to invest in commercial tools for this one task, but as yet I can't find any free tool capable of this job. I want to export this into multiple videos of each section, but have run into nothing but problems trying to do so. mp4 video that has sensible breaks roughly every 30 minutes or so.
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