I download some MKV films. And I prepare convert DTS 6.1 to MKV AC3, so my TV(philips 4000 series) can play the audio. When trying to change the audio from DTS 6.1 ch to AC3, I get the following error that the AC3 encoder received a non-supported format with eac3toGUI. To solve this problem, I try several other DTS decoders, among which, Aunsoft Blu-ray Video Converter Ultimate is best to convert DTS-HD, DTS and DTS-MA codec to AC3 and AAC encoded video formats and various audio formats.

Are you still complaining the long and time consuming methods that converting DTS 6.1 to MKV AC3? Aunsoft Blu-ray is a professional Ultimate MKV DTS 6.1 to AC3 Converter. With the program, you can easily decode DTS to AC3 with 4 clicks. And the program can export file without affecting any audio and video quality of your original MKV files. Besides, if you have many DVD or Blu-ray Discs collection, with the hard-burn and forced subtitle function, the multiple video supported conversion program can rip MKV movies with subtitles.

This step-by-step tutorial will show you how to decode MKV DTS 6.1 to AC3 on Windows platform, including the new Windows 8.1. For Mac users, the operation is extraordinarily similar as below steps with iMeida Converter for Mac.

Step 1: Load DTS MKV file

Click "add video" or "add folder" to load MKV file. You can also directly drag files to the DTS 6.1 to MKV AC3 decode tool.

If you would prefer to combine multiple MKV files as one file, you can tick the checkbox "Merge into one file".

Step 2: Choose HD MKV as output format

Click "Format" and select an optional format. There are customized formats for different devices and application. Here you can choose "HD Video->>MKV HD Video(*.mkv) for best playing on TV.

Step 3: Set the output audio as AC3.

Click “Settings” to set audio codec as AC3. Here you can also adjust aspect ratio, bit rate, frame rate, sample rate, audio channels, etc.

Step 4: Conversion.

Click "Conversion" icon and the Aunsoft Blu-ray Video Converter Ultimate will do convert MKV with DTS 6.1 to MKV AC3 at fast speed. With just a click on "Open output folder", you can locate the export video quickly.