For whatever reason if you have problems importing Sony DSC-W290/L AVCHD mts files into Final Cut Pro X for further editing, we would suggest making new Apple ProRes QuickTime media that is FCP X friendly before you start post production.
“Since I upgraded to High Sierra, I have series troubles on my iMac late 2012 with my Sony DSC-W290/L AVCHD mts files. QuickTime won’t play AVCHD videos from my Sony DSC-W290/L anymore and FCP X won’t import them. Final Cut Pro X starts to import but stops after a while. Tried another user on the iMac, same problem. Any help here?”
Indeed, this is a FCP X issue with High Sierra. To be able to solve the issue, you could convert them first. Here’s a guide displaying how to encode Sony DSC-W290/L AVCHD mts files to ProRes 422 for use in FCP X fluently.
To transcode Sony DSC-W290/L AVCHD footage to ProRes for FCP X, do as below:
Step 1: Import Sony DSC-W290/L AVCHD mts files.
Start up Video Converter for Mac and click “Add File” to load Sony DSC-W290/L AVCHD video files that you need to convert into this program. This converter supports batch conversion, so you can import a bundle of Sony DSC-W290/L AVCHD video files into it to do conversion at a time.
Step 2: Choose output format for FCP X from “Profile” list
Working well as an Sony DSC-W290/L AVCHD converter app, Video Converter for Mac comes with a flavor of Apple ProRes codecs , including Apple ProRes 422, Apple ProRes 422 (HQ), Apple ProRes 422 (LT), Apple ProRes 422 (Proxy) and Apple ProRes 4444. For a good balance between quality and file size, we would recommend choosing “Apple ProRes 422 (*.mov)” as output format under “Final Cut Pro” column. The ProRes 422 codec will ensure a good performance working in FCP X even on an old Mac machine.
If necessary, you can click “Settings” button to modify video and audio parameters like encoder, resolution, frame rate, bitrate, aspect ratio, sample rate, and audio channels. You can also “Enable 3D Settings” to add 3D effect to your source media.
Step 3: Start Sony DSC-W290/L AVCHD MTS to FCP X conversion.
Click “Convert” to start Sony DSC-W290/L AVCHD mts video to ProRes 422 conversion for FCP X. As soon as the conversion is complete, you can click “Open Folder” to get the generated Apple ProRes 422 files for editing in FCP X with optimum performance. Hope it helps.
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