Audio Converter (Popcorn) Problem

[netmask56]

I have a MKV file with an aac audio track I'm trying to convert to ac3. The program (https://www.videohelp.com/tools/PopCorn-MKV-AudioConverter) has always performed flawlessly for me so I am somewhat confused with this error and was wondering what I could have done to trigger an error message that says "conversion complete or program disabled" I have tried other mkv files with aac and it works, only this particular file. I have checked for compressed headers etc...
MediaInfo report.

Video
ID                                       : 1
Format                                   : AVC
Format/Info                              : Advanced Video Codec
Format profile                           : High@L3.1
Format settings, CABAC                   : No
Format settings, ReFrames                : 2 frames
Codec ID                                 : V_MPEG4/ISO/AVC
Duration                                 : 2h 23mn
Width                                    : 1 280 pixels
Height                                   : 546 pixels
Display aspect ratio                     : 2.35:1
Frame rate mode                          : Constant
Frame rate                               : 23.976 fps
Color space                              : YUV
Chroma subsampling                       : 4:2:0
Bit depth                                : 8 bits
Scan type                                : Progressive
Language                                 : English
Default                                  : Yes
Forced                                   : No
Color primaries                          : BT.709
Transfer characteristics                 : BT.709
Matrix coefficients                      : BT.709

Audio
ID                                       : 2
Format                                   : AAC
Format/Info                              : Advanced Audio Codec
Format profile                           : LC
Codec ID                                 : A_AAC
Duration                                 : 2h 23mn
Channel(s)                               : 2 channels
Channel positions                        : Front: L R
Sampling rate                            : 48.0 KHz
Compression mode                         : Lossy
Language                                 : English
Default                                  : Yes
Forced                                   : No

many thanks for any assistance

[Baldrick]

You could also try MKV2AC3.

[netmask56]

Haha yes I tried that with a big fail as well. My longwinded workaround was to use ConvertXtoDVD. I then extracted the audio and laid that into the original MKV - so good video and sound. It's really an academic question as to why the problem with this file and no other similar...?

My fixed file details.

Video
ID                                       : 1
Format                                   : AVC
Format/Info                              : Advanced Video Codec
Format profile                           : High@L3.1
Format settings, CABAC                   : No
Format settings, ReFrames                : 2 frames
Codec ID                                 : V_MPEG4/ISO/AVC
Duration                                 : 2h 23mn
Width                                    : 1 280 pixels
Height                                   : 546 pixels
Display aspect ratio                     : 2.35:1
Frame rate mode                          : Constant
Frame rate                               : 23.976 fps
Color space                              : YUV
Chroma subsampling                       : 4:2:0
Bit depth                                : 8 bits
Scan type                                : Progressive
Language                                 : English
Default                                  : Yes
Forced                                   : No
Color primaries                          : BT.709
Transfer characteristics                 : BT.709
Matrix coefficients                      : BT.709

Audio
ID                                       : 2
Format                                   : PCM
Codec ID                                 : A_PCM/INT/LIT
Duration                                 : 2h 23mn
Bit rate mode                            : Constant
Channel(s)                               : 2 channels
Sampling rate                            : 48.0 KHz
Bit depth                                : 16 bits
Default                                  : Yes
Forced                                   : No