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Getting MKV to work in Final Cut Pro?
#1
Hello fanresers!

I'm looking to demux an MKV file in order to separate the video and the audio tracks and import them separately into Final Cut Pro (FCP). I am currently working on a Mac (running macOS 10.13.6) and do not have access to a Windows machine.
FCP does not support MKV files when importing.

The question is how do I losslessly convert the MKV file to something FCP will import?

  • I have got MKVToolNix installed, but when demuxing video, it produces a MKV file.
  • I have installed AVIDemux, which looks promising, but I wanted to confirm the settings for a lossless extraction.
  • I have got ffmpeg downloaded, and I understand it's a command-line based programme. I'm ok with using Terminal for programmes (although if you have a guide you could point me to, I'll take it!), I just wanted to see if anyone else recommends it, as it seems to be the most powerful tool out there.

Thanks folks!
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#2
Not really familiar with Final Cut, but you can convert your 264 MKV to ProRes easy enough with ffmpeg:

ffmpeg.exe -i "source.mkv" -vcodec prores_ks -profile:v 4 "output.mov"
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Thanks given by: Kynch
#3
Hi, another way is to use mkv extract.

You end up with an ac3 file, and a video file that you might rename as h264 if it is, or just remux that video file to m2ts with TSmuxer.

Import both, align them, you're good to go. You can also blend the video and audio as one file in your timeline, which allows for better editing sync.
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Thanks given by: Kynch
#4
(2020-05-06, 05:47 PM)Stamper Wrote: Hi, another way is to use mkv extract.

You end up with an ac3 file, and a video file that you might rename as h264 if it is, or just remux that video file to m2ts with TSmuxer.

Import both, align them, you're good to go. You can also blend the video and audio as one file in your timeline, which allows for better editing sync.

Thanks for the tip. Do you know if there's an MKV Extract GUI app for macOS?
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#5
Yes, you can google it.
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