Mkv audio out of sinc


#1

so i have a lot of mkvs… and only one series has this audio out of sync problem. I realize its a codac problem because it plays fine on my computer… but is there a way to only re encode the audio, the video is fine and I dont want to lose any quality

So apperintly I found out through media Info it seems that wd tv cant suprt AC-3 Audio … Please , Please add suport for this, Thankyou


#2

I have re encoded it with handbrake as a mp4 and this worked… but it should still suport mkvs better


#3

Check my reply in your other thread, it might be GMC/QPEL that causes the problem,

please check :wink:


#4

no it isnt … this is the media info output for the mkv files that have audio sync probelms, it doesnt have those settings


Format                           : Matroska
File size                        : 13.1 MiB
Duration                         : 1mn 11s
Overall bit rate                 : 1 537 Kbps
Writing application              : HandBrake 0.9.3

Video
ID                               : 1
Format                           : AVC
Format/Info                      : Advanced Video Codec
Format profile                   : Main@L3.0
Format settings, CABAC           : Yes
Format settings, ReFrames        : 2 frames
Muxing mode                      : Container profile=Unknown@3.0
Codec ID                         : V_MPEG4/ISO/AVC
Duration                         : 1mn 11s
Bit rate                         : 1 315 Kbps
Nominal bit rate                 : 1 528 Kbps
Width                            : 720 pixels
Height                           : 480 pixels
Display aspect ratio             : 4:3
Frame rate                       : 29.970 fps
Standard                         : NTSC
Resolution                       : 8 bits
Colorimetry                      : 4:2:0
Scan type                        : Progressive
Bits/(Pixel*Frame)               : 0.127
Stream size                      : 11.2 MiB (85%)
Writing library                  : x264 core 65
Encoding settings                : cabac=1 / ref=2 / deblock=1:0:0 / analyse=0x1:0x111 / me=umh / subme=6 / psy_rd=1.0:0.0 / mixed_ref=0 / me_range=16 / chroma_me=1 / trellis=0 / 8x8dct=0 / cqm=0 / deadzone=21,11 / chroma_qp_offset=-2 / threads=3 / nr=0 / decimate=1 / mbaff=0 / bframes=2 / b_pyramid=0 / b_adapt=1 / b_bias=0 / direct=1 / wpredb=0 / keyint=300 / keyint_min=30 / scenecut=40(pre) / rc=2pass / bitrate=1528 / ratetol=1.0 / qcomp=0.60 / qpmin=10 / qpmax=51 / qpstep=4 / cplxblur=20.0 / qblur=0.5 / ip_ratio=1.40 / pb_ratio=1.30 / aq=1:1.00
Color primaries                  : BT.601-6 525, BT.1358 525, BT.1700 NTSC, SMPTE 170M
Transfer characteristics         : BT.709-5, BT.1361
Matrix coefficients              : BT.601-6 525, BT.1358 525, BT.1700 NTSC, SMPTE 170M

Audio
ID                               : 2
Format                           : AC-3
Format/Info                      : Audio Coding 3
Codec ID                         : A_AC3
Duration                         : 1mn 11s
Bit rate mode                    : Constant
Bit rate                         : 192 Kbps
Channel(s)                       : 2 channels
Channel positions                : L R
Sampling rate                    : 48.0 KHz
Stream size                      : 1.64 MiB (12%)
Language                         : English


#5

Edit: Oh dear.  Spot the ■■■■■ who responded to a post in the wrong forum!  Re-posting in WD TV Live. 

I haven’t been able to find a clear answer to this one, so hopefully someone can help. 

WD TV Live

Firmware 1.02.21

DVD Decrypter to rip from DVDs in File mode. 

Handbrake to convert into individual chapters.  (Main focus is music videos.) 

Using High Profile preset, with container set to MKV file. 

Why am I using MKV? 

2 reasons: Using MP4 I see bad video artifacts on the WD TV Live (through my Sanyo projector), and the WD TV Live for some reason sees some of the MP4s as video files and some as music files.  I can’t figure that out! 

What is the problem with the MKV files? 

After a few seconds I start to see the audio/video getting significantly out of sync. 

Does this happen with ALL MKV files? 

Nope.  It only happens with certain DVDs, and I cannot find a root cause of which DVDs have the problem. 

Does this happen with MP4 files?

Nope.  A Handbrake-generated High Profile file is just fine, whether it has a .m4v or .mp4 extension. 

Is it a region problem? 

Nope.  I see exactly the same problem on some DVDs from Region 1 and some DVDs from Region 2/3/4/5. 

Is it a PAL/NTSC problem?

Nope.  Same problem occurs on some PAL DVDs and some NTSC DVDs. 

Do the MKVs exhibit the problem on other media players? 

On a PC using Media Player Classic the files look fine. 

OK, what are the details? 

Here is Media Info details on an MKV file that exhibits the problem:

Complete name                    : C:…Brimful Of Asha.mkv
Format                           : Matroska
File size                        : 91.3 MiB
Duration                         : 4mn 36s
Overall bit rate                 : 2 764 Kbps
Writing application              : HandBrake 0.9.4

Video
ID                               : 1
Format                           : AVC
Format/Info                      : Advanced Video Codec
Format profile                   : High@L3.0
Format settings, CABAC           : Yes
Format settings, ReFrames        : 3 frames
Muxing mode                      : Container profile=Unknown@3.0
Codec ID                         : V_MPEG4/ISO/AVC
Duration                         : 4mn 36s
Width                            : 720 pixels
Height                           : 480 pixels
Display aspect ratio             : 16:9
Frame rate                       : 29.970 fps
Standard                         : NTSC
Color space                      : YUV
Chroma subsampling               : 4:2:0
Bit depth                        : 8 bits
Scan type                        : Progressive
Writing library                  : x264 core 79
Encoding settings                : cabac=1 / ref=3 / deblock=1:0:0 / analyse=0x3:0x113 / me=hex / subme=7 / psy=1 / psy_rd=1.0:0.0 / mixed_ref=1 / me_range=16 / chroma_me=1 / trellis=1 / 8x8dct=1 / cqm=0 / deadzone=21,11 / chroma_qp_offset=-2 / threads=6 / nr=0 / decimate=1 / mbaff=0 / constrained_intra=0 / bframes=3 / b_pyramid=0 / b_adapt=2 / b_bias=0 / direct=1 / wpredb=1 / wpredp=2 / keyint=300 / keyint_min=30 / scenecut=40 / rc_lookahead=50 / rc=crf / mbtree=1 / crf=20.0 / qcomp=0.60 / qpmin=10 / qpmax=51 / qpstep=4 / ip_ratio=1.40 / aq=1:1.00
Color primaries                  : BT.601-6 525, BT.1358 525, BT.1700 NTSC, SMPTE 170M
Transfer characteristics         : BT.709-5, BT.1361
Matrix coefficients              : BT.601-6 525, BT.1358 525, BT.1700 NTSC, SMPTE 170M

Audio
ID                               : 2
Format                           : AAC
Format/Info                      : Advanced Audio Codec
Format version                   : Version 4
Format profile                   : LC
Format settings, SBR             : No
Codec ID                         : A_AAC
Duration                         : 4mn 36s
Channel(s)                       : 2 channels
Channel positions                : Front: L R
Sampling rate                    : 48.0 KHz
Language                         : English

Menu
00:00:00.000                     : Chapter 01

Here is Media Info detail on an MP4 file of the same chapter that does NOT exhibit the problem:

(There is a second audio track; both show the sync problem.)

General
Complete name                    : C:…Brimful Of Asha.mp4
Format                           : MPEG-4
Format profile                   : Base Media / Version 2
Codec ID                         : mp42
File size                        : 99.6 MiB
Duration                         : 4mn 36s
Overall bit rate                 : 3 017 Kbps
Encoded date                     : UTC 2010-07-27 14:05:29
Tagged date                      : UTC 2010-07-27 14:11:59
Writing application              : HandBrake 0.9.4 2009112300

Video
ID                               : 1
Format                           : AVC
Format/Info                      : Advanced Video Codec
Format profile                   : High@L3.0
Format settings, CABAC           : Yes
Format settings, ReFrames        : 3 frames
Codec ID                         : avc1
Codec ID/Info                    : Advanced Video Coding
Duration                         : 4mn 36s
Bit rate mode                    : Variable
Bit rate                         : 2 597 Kbps
Width                            : 720 pixels
Height                           : 480 pixels
Display aspect ratio             : 16:9
Frame rate mode                  : Variable
Frame rate                       : 29.609 fps
Original frame rate              : 29.970 fps
Minimum frame rate               : 19.973 fps
Maximum frame rate               : 29.970 fps
Standard                         : NTSC
Color space                      : YUV
Chroma subsampling               : 4:2:0
Bit depth                        : 8 bits
Scan type                        : Progressive
Bits/(Pixel*Frame)               : 0.254
Stream size                      : 85.7 MiB (86%)
Writing library                  : x264 core 79
Encoding settings                : cabac=1 / ref=3 / deblock=1:0:0 / analyse=0x3:0x113 / me=hex / subme=7 / psy=1 / psy_rd=1.0:0.0 / mixed_ref=1 / me_range=16 / chroma_me=1 / trellis=1 / 8x8dct=1 / cqm=0 / deadzone=21,11 / chroma_qp_offset=-2 / threads=6 / nr=0 / decimate=1 / mbaff=0 / constrained_intra=0 / bframes=3 / b_pyramid=0 / b_adapt=2 / b_bias=0 / direct=1 / wpredb=1 / wpredp=2 / keyint=300 / keyint_min=30 / scenecut=40 / rc_lookahead=50 / rc=crf / mbtree=1 / crf=20.0 / qcomp=0.60 / qpmin=10 / qpmax=51 / qpstep=4 / ip_ratio=1.40 / aq=1:1.00
Encoded date                     : UTC 2010-07-27 14:05:29
Tagged date                      : UTC 2010-07-27 14:11:59
Color primaries                  : BT.601-6 525, BT.1358 525, BT.1700 NTSC, SMPTE 170M
Transfer characteristics         : BT.709-5, BT.1361
Matrix coefficients              : BT.601-6 525, BT.1358 525, BT.1700 NTSC, SMPTE 170M

Audio #1
ID                               : 2
Format                           : AAC
Format/Info                      : Advanced Audio Codec
Format version                   : Version 4
Format profile                   : LC
Format settings, SBR             : No
Codec ID                         : 40
Duration                         : 4mn 36s
Bit rate mode                    : Variable
Bit rate                         : 160 Kbps
Maximum bit rate                 : 196 Kbps
Channel(s)                       : 2 channels
Channel positions                : Front: L R
Sampling rate                    : 48.0 KHz
Stream size                      : 5.28 MiB (5%)
Language                         : English
Encoded date                     : UTC 2010-07-27 14:05:29
Tagged date                      : UTC 2010-07-27 14:11:59

I would appreciate any pointers! 

TIA,

Mike