Here's the error message I got:
"Warning: The track number 0 from the file 'C:\Users\Bonito\Desktop\4.mkv' can probably not be appended correctly to the track number 0 from the file 'C:\Users\Bonito\Desktop\3.mkv': The codec's private data does not match (lengths: 41 and 56). Please make sure that the resulting file plays correctly the whole time. The author of this program will probably not give support for playback issues with the resulting file."
Mediainfo:
4.mkv
Complete name : C:\Users\Bonito\Desktop\4.mkv
Format : Matroska
Format version : Version 4 / Version 2
File size : 539 MiB
Duration : 29mn 11s
Overall bit rate : 2 581 Kbps
Encoded date : UTC 2010-02-22 21:41:31
Writing application : mkvmerge v5.9.0 ('On The Loose') built on Dec 9 2012 15:37:01
Writing library : libebml v1.3.0 + libmatroska v1.4.0
Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L4.1
Format settings, CABAC : Yes
Format settings, ReFrames : 4 frames
Codec ID : V_MPEG4/ISO/AVC
Duration : 29mn 11s
Width : 1 280 pixels
Height : 720 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 23.976 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Writing library : x264 core 107 r1745 4785e8e
Encoding settings : cabac=1 / ref=4 / deblock=1:0:0 / analyse=0x3:0x133 / me=umh / subme=10 / psy=1 / psy_rd=0.40:0.00 / mixed_ref=1 / me_range=24 / chroma_me=1 / trellis=2 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=0 / chroma_qp_offset=-2 / threads=6 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / constrained_intra=0 / bframes=8 / b_pyramid=2 / b_adapt=2 / b_bias=0 / direct=3 / weightb=1 / open_gop=0 / weightp=2 / keyint=240 / keyint_min=1 / scenecut=75 / intra_refresh=0 / rc=crf / mbtree=0 / crf=16.0 / qcomp=0.70 / qpmin=2 / qpmax=30 / qpstep=4 / ip_ratio=1.40 / pb_ratio=1.30 / aq=2:1.00
Language : English
Default : Yes
Forced : No
Audio
ID : 2
Format : AAC
Format/Info : Advanced Audio Codec
Format profile : LC
Codec ID : A_AAC
Duration : 29mn 11s
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 48.0 KHz
Compression mode : Lossy
Language : English
Default : Yes
Forced : No
3.mkv
Complete name : C:\Users\Bonito\Desktop\3.mkv
Format : Matroska
Format version : Version 4 / Version 2
File size : 132 MiB
Duration : 2mn 51s
Overall bit rate mode : Variable
Overall bit rate : 6 488 Kbps
Encoded date : UTC 2010-02-22 21:41:31
Writing application : mkvmerge v5.9.0 ('On The Loose') built on Dec 9 2012 15:37:01
Writing library : libebml v1.3.0 + libmatroska v1.4.0
Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L4.1
Format settings, CABAC : Yes
Format settings, ReFrames : 4 frames
Codec ID : V_MPEG4/ISO/AVC
Duration : 2mn 51s
Bit rate mode : Variable
Maximum bit rate : 40.0 Mbps
Width : 1 280 pixels
Height : 720 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 23.976 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Writing library : x264 core 120
Encoding settings : cabac=1 / ref=4 / deblock=1:0:0 / analyse=0x3:0x113 / me=hex / subme=7 / psy=1 / psy_rd=1.00:0.00 / mixed_ref=1 / me_range=16 / chroma_me=1 / trellis=1 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=-2 / threads=6 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / bluray_compat=0 / constrained_intra=0 / bframes=3 / b_pyramid=2 / b_adapt=2 / b_bias=0 / direct=1 / weightb=1 / open_gop=0 / weightp=2 / keyint=240 / keyint_min=24 / scenecut=40 / intra_refresh=0 / rc_lookahead=50 / rc=crf / mbtree=1 / crf=13.0 / qcomp=0.60 / qpmin=3 / qpmax=69 / qpstep=4 / ip_ratio=1.40 / aq=1:1.0
Default : Yes
Forced : No
Color primaries : BT.601 NTSC
Transfer characteristics : BT.709
Matrix coefficients : BT.601
Audio
ID : 2
Format : AAC
Format/Info : Advanced Audio Codec
Format profile : LC
Codec ID : A_AAC
Duration : 2mn 51s
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 48.0 KHz
Compression mode : Lossy
Default : Yes
Forced : No
Well basically, result was the 2nd file that I appended will be messed up (green screen, no video, etc..) I have re encoded 3.mkv so that it will match 4.mkv. I probably missed something but I'm not so sure. Any thoughts? If possible, I'd like to keep 4.mkv the way it is and avoid any re encoding for it.
"Warning: The track number 0 from the file 'C:\Users\Bonito\Desktop\4.mkv' can probably not be appended correctly to the track number 0 from the file 'C:\Users\Bonito\Desktop\3.mkv': The codec's private data does not match (lengths: 41 and 56). Please make sure that the resulting file plays correctly the whole time. The author of this program will probably not give support for playback issues with the resulting file."
Mediainfo:
4.mkv
Complete name : C:\Users\Bonito\Desktop\4.mkv
Format : Matroska
Format version : Version 4 / Version 2
File size : 539 MiB
Duration : 29mn 11s
Overall bit rate : 2 581 Kbps
Encoded date : UTC 2010-02-22 21:41:31
Writing application : mkvmerge v5.9.0 ('On The Loose') built on Dec 9 2012 15:37:01
Writing library : libebml v1.3.0 + libmatroska v1.4.0
Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L4.1
Format settings, CABAC : Yes
Format settings, ReFrames : 4 frames
Codec ID : V_MPEG4/ISO/AVC
Duration : 29mn 11s
Width : 1 280 pixels
Height : 720 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 23.976 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Writing library : x264 core 107 r1745 4785e8e
Encoding settings : cabac=1 / ref=4 / deblock=1:0:0 / analyse=0x3:0x133 / me=umh / subme=10 / psy=1 / psy_rd=0.40:0.00 / mixed_ref=1 / me_range=24 / chroma_me=1 / trellis=2 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=0 / chroma_qp_offset=-2 / threads=6 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / constrained_intra=0 / bframes=8 / b_pyramid=2 / b_adapt=2 / b_bias=0 / direct=3 / weightb=1 / open_gop=0 / weightp=2 / keyint=240 / keyint_min=1 / scenecut=75 / intra_refresh=0 / rc=crf / mbtree=0 / crf=16.0 / qcomp=0.70 / qpmin=2 / qpmax=30 / qpstep=4 / ip_ratio=1.40 / pb_ratio=1.30 / aq=2:1.00
Language : English
Default : Yes
Forced : No
Audio
ID : 2
Format : AAC
Format/Info : Advanced Audio Codec
Format profile : LC
Codec ID : A_AAC
Duration : 29mn 11s
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 48.0 KHz
Compression mode : Lossy
Language : English
Default : Yes
Forced : No
3.mkv
Complete name : C:\Users\Bonito\Desktop\3.mkv
Format : Matroska
Format version : Version 4 / Version 2
File size : 132 MiB
Duration : 2mn 51s
Overall bit rate mode : Variable
Overall bit rate : 6 488 Kbps
Encoded date : UTC 2010-02-22 21:41:31
Writing application : mkvmerge v5.9.0 ('On The Loose') built on Dec 9 2012 15:37:01
Writing library : libebml v1.3.0 + libmatroska v1.4.0
Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L4.1
Format settings, CABAC : Yes
Format settings, ReFrames : 4 frames
Codec ID : V_MPEG4/ISO/AVC
Duration : 2mn 51s
Bit rate mode : Variable
Maximum bit rate : 40.0 Mbps
Width : 1 280 pixels
Height : 720 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 23.976 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Writing library : x264 core 120
Encoding settings : cabac=1 / ref=4 / deblock=1:0:0 / analyse=0x3:0x113 / me=hex / subme=7 / psy=1 / psy_rd=1.00:0.00 / mixed_ref=1 / me_range=16 / chroma_me=1 / trellis=1 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=-2 / threads=6 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / bluray_compat=0 / constrained_intra=0 / bframes=3 / b_pyramid=2 / b_adapt=2 / b_bias=0 / direct=1 / weightb=1 / open_gop=0 / weightp=2 / keyint=240 / keyint_min=24 / scenecut=40 / intra_refresh=0 / rc_lookahead=50 / rc=crf / mbtree=1 / crf=13.0 / qcomp=0.60 / qpmin=3 / qpmax=69 / qpstep=4 / ip_ratio=1.40 / aq=1:1.0
Default : Yes
Forced : No
Color primaries : BT.601 NTSC
Transfer characteristics : BT.709
Matrix coefficients : BT.601
Audio
ID : 2
Format : AAC
Format/Info : Advanced Audio Codec
Format profile : LC
Codec ID : A_AAC
Duration : 2mn 51s
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 48.0 KHz
Compression mode : Lossy
Default : Yes
Forced : No
Well basically, result was the 2nd file that I appended will be messed up (green screen, no video, etc..) I have re encoded 3.mkv so that it will match 4.mkv. I probably missed something but I'm not so sure. Any thoughts? If possible, I'd like to keep 4.mkv the way it is and avoid any re encoding for it.