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Convert MKV FLAC to AC3/AAC with 5.1 Audio Channels

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MKV Converter

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Recently, many friends asked for help, they are urgent to know how to convert their MKV file with FLAC audio to AC3/AAC, also keep its 5.1 channels and high quality, for playing on HDTV, Apple TV, or other uses. Now I will show you how to let your MKV FLac to AC3/AAC 5.1 channels conversion perfectly achieved, just using Aunsoft MKV Converter – Best MKV FLAC to AC3/AAC Converter.

Step-by-step guide for converting MKV with FLAC audio to AC3/AAC with 5.1 Channels

Free download Aunsoft MKV FLAC to AC3/AAC Converter (For Windows) or Aunsoft MKV FLAC to AC3/AAC Converter for Mac (For Mac), install and run it.

Step 1: Import or add the MKV files with FLAC sound into this program. You can also click “Properties” to check whether the files is MKV with FLAC audio. Please check the follow picture. It is obvious that the video I imported is just MKV with H.264 FLAC encoded, and with high quality resolution 1920*1080.

convert mkv flac to ac3 aac

Step 2: If you want to convert MKV FLAC to MKV AC3 or MKV FLAC to MKV AAC, you can select the output video format .MKV from the drop-down list “Format”, and then you can click “Settings” to enter into the follow window and select video codec (h.264), audio codec (AC3 or AAC), audio channels (5.1). See as follow: (If you only want the audio, no video, please select common audio (*ac3, *.aac) as output format from the drop-down list “Format”, you can also convert to any other format you want, depend on your choice.)

mkv flac to ac3 flac to aac 6 channels

Step 3: Select the output folder by clicking Folder icon of Output.

Step 4: Click the “Convert” button to start converting your MKV FLAC to AC3 or AAC with 5.1 audio channels.  

Quickly you could get your converted MKV AC3 or MKV AAC files with 5.1 channels and the audio/video sync correctly and perfectly.


1. Comprehensive codes stalled in this program, so you could convert MKV files with any codec to what you want. And you never need worry about such a program could eat your space.

2. No matter the MKV video is HD quality or SD quality, you can play, convert, edit by trimming, cropping, effecting, etc the files without a hitch in this program, the speed is fast, the output files never happen out of sync.

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Convert MKV with DTS sound to AC3 with 5.1 channels, Convert DTS from DVD to AC3 with 5.1 Channels, Convert/Rip Blu-Ray TrueHD, DTS-HD, DTS Audio to Lossless Audio

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