DVD to MP4 - A/V Sync issues

[streamingguy]

Hello,

I am encoding all of my movie DVDs into MP4 files to use them for adaptive streaming (6 different bit rates).

I am using MeGUI for this encoding and everything seems to be pretty good except some few a/v sync issues.

Many of my DVDs have full interlaced content or partial interlaced content.

So, after selecting my input, I am doing "Analysis" of the input and selecting the deinterlace filter suggested by MeGUI.

For many of the DVDs, it is "TIVTC".

After that, I am selecting custom parameters for X264 and doing AAC audio encoding using Nero.

Then, muxing the streams into MP4 using MP4 muxer.

For all the outputs, I see a little a/v sync issues. The sync issue appears & disappears automatically for every 2 to 3 minutes. The issue looks as a cycle.

If it is constant, I might have adjusted the delay. But, it is coming as cycles.

Could you please suggest me something to fix this issue?

Thank you for your time!

[streamingguy]

Here is more info:

When I extract .VOB from DVD, DVDDecrypter created the following log:

Stream Type: MPEG2 Program
Profile: main@main
Frame Size: 720x480
Display Size: [not specified]
Aspect Ratio: 16:9 [3]
Frame Rate: 29.970030 fps
Video Type: NTSC
Frame Type: Interlaced
Coding Type: B
Colorimetry: BT.470-2 B,G*
Frame Structure: Frame
Field Order: 
Coded Number: 280211
Playback Number: 2
Frame Repeats: 0
Field Repeats: 0
VOB ID: 1
Cell ID: 28
Bitrate: 
Bitrate (Avg): 
Bitrate (Max): 
Audio Stream: 80: AC3 3/2 448
Timestamp: 2:35:49
Elapsed: 0:01:21
Remain: FINISH
FPS: 
Info:

Below is the info from MediaInfo tool:

General
Complete name                            : D:\Source\MyTestVideo.VOB
Format                                   : MPEG-PS
File size                                : 7.50 GiB
Duration                                 : 2h 35mn
Overall bit rate mode                    : Variable
Overall bit rate                         : 6 891 Kbps

Video
ID                                       : 224 (0xE0)
Format                                   : MPEG Video
Format version                           : Version 2
Format profile                           : Main@Main
Format settings, BVOP                    : Yes
Format settings, Matrix                  : Custom
Format settings, GOP                     : M=3, N=15
Duration                                 : 2h 35mn
Bit rate mode                            : Variable
Bit rate                                 : 6 306 Kbps
Maximum bit rate                         : 8 000 Kbps
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                                : Interlaced
Scan order                               : Top Field First
Compression mode                         : Lossy
Bits/(Pixel*Frame)                       : 0.609
Stream size                              : 6.86 GiB (92%)

Audio
ID                                       : 189 (0xBD)-128 (0x80)
Format                                   : AC-3
Format/Info                              : Audio Coding 3
Mode extension                           : CM (complete main)
Format settings, Endianness              : Big
Muxing mode                              : DVD-Video
Duration                                 : 11s 40ms
Bit rate mode                            : Constant
Bit rate                                 : 448 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                              : 604 KiB (0%)

I am using below AVISynth script to resize and place watermark:

LoadPlugin("D:\MeGUI_2153_x86\tools\dgindex\DGDecode.dll")
DGDecode_mpeg2source("D:\Output\MyTestVideo.d2v", info=3)
LoadPlugin("D:\MeGUI_2153_x86\tools\avisynth_plugin\ColorMatrix.dll")
ColorMatrix(hints=true, interlaced=true, threads=0)
LoadPlugin("D:\MeGUI_2153_x86\tools\avisynth_plugin\TIVTC.dll")
tfm(order=-1).tdecimate(hybrid=3)
a1=LanczosResize(768,432) # Lanczos (Sharp)
a2=ImageReader("D:\Logos\Watermark_80x80.png")
a3=ImageReader("D:\Logos\Watermark_80x80.png",pixel_type="RGB32").ShowAlpha(pixel_type="RGB32")
Overlay(a1,a2,mask=a3, x=640, y=1)

Then, I am using the attached X264 profiles to encode the video into 1800k variant. I am NeroAAC to encode AC3 into AAC with 128k bitrate.

Once the video & audio tracks are ready, I am muxing them using MP4muxer. But, when I play the MP4 file, av will be in perfectly sync for 1 minute (approx.) and then it will go out of sync for next 3 to 4 minutes. Audio comes 0.5 seconds before the video.

The above cycle repeats through out the movie.

Below is the info of MP4 from MediaInfo:

General
Complete name                            : D:\Output\MyTestVideo_1800k.mp4
Format                                   : MPEG-4
Format profile                           : Base Media
Codec ID                                 : isom
File size                                : 2.09 GiB
Duration                                 : 2h 35mn
Overall bit rate                         : 1 921 Kbps
Writing application                      : Lavf54.33.100

Video
ID                                       : 1
Format                                   : AVC
Format/Info                              : Advanced Video Codec
Format profile                           : Main@L3.1
Format settings, CABAC                   : Yes
Format settings, ReFrames                : 4 frames
Codec ID                                 : avc1
Codec ID/Info                            : Advanced Video Coding
Duration                                 : 2h 35mn
Bit rate                                 : 1 800 Kbps
Width                                    : 768 pixels
Height                                   : 432 pixels
Display aspect ratio                     : 16:9
Frame rate mode                          : Constant
Frame rate                               : 29.970 fps
Color space                              : YUV
Chroma subsampling                       : 4:2:0
Bit depth                                : 8 bits
Scan type                                : Progressive
Bits/(Pixel*Frame)                       : 0.181
Stream size                              : 1.95 GiB (93%)
Writing library                          : x264 core 125 r2200 999b753
Encoding settings                        : cabac=1 / ref=3 / deblock=1:0:0 / analyse=0x1:0x111 / me=hex / subme=8 / psy=1 / psy_rd=1.00:0.15 / mixed_ref=1 / me_range=16 / chroma_me=1 / trellis=1 / 8x8dct=0 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=-3 / threads=12 / lookahead_threads=2 / 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=3 / weightb=1 / open_gop=0 / weightp=2 / keyint=60 / keyint_min=31 / scenecut=0 / intra_refresh=0 / rc_lookahead=40 / rc=2pass / mbtree=1 / bitrate=1800 / ratetol=1.0 / qcomp=0.60 / qpmin=10 / qpmax=51 / qpstep=4 / cplxblur=20.0 / qblur=0.5 / vbv_maxrate=1800 / vbv_bufsize=1800 / nal_hrd=none / ip_ratio=1.40 / aq=1:1.00
Tagged date                              : UTC 2012-10-23 23:40:00

Audio
ID                                       : 2
Format                                   : AAC
Format/Info                              : Advanced Audio Codec
Format profile                           : LC
Codec ID                                 : 40
Duration                                 : 2h 35mn
Bit rate mode                            : Constant
Bit rate                                 : 128 Kbps
Channel(s)                               : 2 channels
Channel positions                        : Front: L R
Sampling rate                            : 48.0 KHz
Compression mode                         : Lossy
Delay relative to video                  : -2s 2ms
Stream size                              : 143 MiB (7%)
Tagged date                              : UTC 2012-10-23 23:40:00

Please let me know, if you have any suggestions. Thank you for your time!