Hi guys,

I'll post two outputs of MKV info. Both files have two audio tracks, which are both AC3. However, only the fist video will be played back with sound. I have no clue why. If I remove the second audio track from the second video, it will play back sound. As I would not want to delete all english tracks from by tv series, I'd like to know how to make all mkvs play back with two sound tracks. Thanks for your insights!

Video 1 (WITH Sound)


Format : Matroska
Format version : Version 2
File size : 1.43 GiB
Duration : 42mn 16s
Overall bit rate : 4 835 Kbps
Encoded date : UTC 2010-06-09 20:25:42
Writing application : mkvmerge v3.4.0 ('Rapunzel') gebaut am May 15 2010 09:38:20
Writing library : libebml v0.8.0 + libmatroska v0.9.0

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 : 42mn 16s
Bit rate : 4 163 Kbps
Width : 1 280 pixels
Height : 720 pixels
Display aspect ratio : 16:9
Frame rate : 25.000 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.181
Stream size : 1.23 GiB (86%)
Language : German
Default : Yes
Forced : No
Color primaries : BT.709-5, BT.1361, IEC 61966-2-4, SMPTE RP177
Transfer characteristics : BT.709-5, BT.1361
Matrix coefficients : BT.709-5, BT.1361, IEC 61966-2-4 709, SMPTE RP177

Audio #1
ID : 2
Format : AC-3
Format/Info : Audio Coding 3
Format profile : Dolby Digital
Mode extension : CM (complete main)
Codec ID : A_AC3
Duration : 42mn 16s
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
Stream size : 58.1 MiB (4%)
Language : German
Default : Yes
Forced : No

Audio #2
ID : 3
Format : AC-3
Format/Info : Audio Coding 3
Mode extension : CM (complete main)
Codec ID : A_AC3
Duration : 42mn 16s
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 : 116 MiB (8%)
Language : English
Default : No
Forced : No

Video 2 (WITHOUT Sound)


Format : Matroska
Format version : Version 2
File size : 1.40 GiB
Duration : 41mn 17s
Overall bit rate : 4 864 Kbps
Encoded date : UTC 2010-11-17 23:07:35
Writing application : mkvmerge v4.3.0 ('Escape from the Island') gebaut am Sep 5 2010 10:30:51
Writing library : libebml v1.0.0 + libmatroska v1.0.0

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 : 41mn 18s
Bit rate : 4 191 Kbps
Width : 1 280 pixels
Height : 720 pixels
Display aspect ratio : 16:9
Frame rate : 25.000 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.182
Stream size : 1.21 GiB (86%)
Default : Yes
Forced : No
Color primaries : BT.709-5, BT.1361, IEC 61966-2-4, SMPTE RP177
Transfer characteristics : BT.709-5, BT.1361
Matrix coefficients : BT.709-5, BT.1361, IEC 61966-2-4 709, SMPTE RP177

Audio #1
ID : 2
Format : AC-3
Format/Info : Audio Coding 3
Format profile : Dolby Digital
Mode extension : CM (complete main)
Codec ID : A_AC3
Duration : 41mn 17s
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
Stream size : 56.7 MiB (4%)
Language : German
Default : Yes
Forced : No

Audio #2
ID : 3
Format : AC-3
Format/Info : Audio Coding 3
Mode extension : CM (complete main)
Codec ID : A_AC3
Duration : 41mn 17s
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 : 113 MiB (8%)
Language : English
Default : No
Forced : No