Commented Unassigned: Multiple Audio Tracks Wrong Output [1632]

Using the MKV High profile, I notice that when my input MPEG2 (.TS) file has two AC3 streams, one 6 channel 384Kbps and one 2 channel 192Kbps, I end up with an MKV file that has two 6 channel 384Kbps audio streams. It is using ffmpeg. Any help would be appreciated.

Here is the MediaInfo output from input file:
Audio #1
ID : 52 (0x34)
Menu ID : 3 (0x3)
Format : AC-3
Format/Info : Audio Coding 3
Mode extension : CM (complete main)
Format settings, Endianness : Big
Codec ID : 129
Duration : 1h 3mn
Bit rate mode : Constant
Bit rate : 384 Kbps
Channel(s) : 6 channels
Channel positions : Front: L C R, Side: L R, LFE
Sampling rate : 48.0 KHz
Bit depth : 16 bits
Compression mode : Lossy
Delay relative to video : 4ms
Stream size : 176 MiB (3%)
Language : English
Name : en:Primary Audio

Audio #2
ID : 53 (0x35)
Menu ID : 3 (0x3)
Format : AC-3
Format/Info : Audio Coding 3
Mode extension : CM (complete main)
Format settings, Endianness : Big
Codec ID : 129
Duration : 1h 3mn
Bit rate mode : Constant
Bit rate : 192 Kbps
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 48.0 KHz
Bit depth : 16 bits
Compression mode : Lossy
Delay relative to video : -188ms
Stream size : 87.9 MiB (1%)
Language : English
Name : en:Secondary Audio

------------
And the MediaInfo from the resultant output MKV file:
Audio #1
ID : 1
Format : AC-3
Format/Info : Audio Coding 3
Mode extension : CM (complete main)
Format settings, Endianness : Big
Codec ID : A_AC3
Duration : 43mn 4s
Bit rate mode : Constant
Bit rate : 384 Kbps
Channel(s) : 6 channels
Channel positions : Front: L C R, Side: L R, LFE
Sampling rate : 48.0 KHz
Bit depth : 16 bits
Compression mode : Lossy
Stream size : 118 MiB (10%)
Default : Yes
Forced : No

Audio #2
ID : 2
Format : AC-3
Format/Info : Audio Coding 3
Mode extension : CM (complete main)
Format settings, Endianness : Big
Codec ID : A_AC3
Duration : 43mn 4s
Bit rate mode : Constant
Bit rate : 384 Kbps
Channel(s) : 6 channels
Channel positions : Front: L C R, Side: L R, LFE
Sampling rate : 48.0 KHz
Bit depth : 16 bits
Compression mode : Lossy
Stream size : 118 MiB (10%)
Default : No
Forced : No
Comments: ** Comment from web user: rboy1 **

That's because the profile is written that way. You can create your own profile if you have a good understanding of ffmpeg or handbrake.

One option is you can use the copy codec to copy the original audio stream instead of using the ac3 codec.