Audio Sync DVD to MKV

[Bob65536]

Hi I'm planning on converting a bunch of DVD movies I have on my hard drive. These are the steps I take for each one.


Make a list of all the VOB files.
Demux the ac3 audio from the VOBs using DGMPGDec.
dgindex -IF=[in_X.VOB] -OF=[audio_X] -OM=2
Transcode the VOBs into an mkv using x264's internal decoder.
x264-64 --preset slower --crf 19 -o video_X.mkv in_X.VOB
Mux the video and ac3 with mkvmerge using the --sync delay from the ac3 file.
mkvmerge -o mov_X.mkv video_X.mkv --sync 0:DELAY audio_X.ac3
Merge the mkv files using mkvmerge.
mkvmerge -o final.mkv mov_1.mkv +mov_2.mkv +mov_3.mkv +mov_4.mkv --track-order 0:1,0:2
--append-to 1:1:0:1,2:1:1:1,3:1:2:1,1:2:0:2,2:2:1:2,3:2:2:2


I have done this to a few movies and the output seems alright to me. I used an avisynth script and mkvmerge a while back to convert some movies and I had audio sync issues on some DVDs. So I would like to make sure that I'm transcoding the DVDs correctly, and in particular I want to make sure I don't have any potential problems with the audio.

:thanks:

[J_Darnley]

Why do you create so many mkv files? Do you make one for each 1GB vob file of the movie? If so, just append the vob files in DGIndex

[stax76]

Always encode a movie in one piece.

DGIndex has a option 'Save Project and demux video'.
MakeMKV could rip a single MKV file x264 possibly can read.
DVD Decrypter can output a single VOB file, DVD Decrypter can be used with AnyDVD or DVDfab Passkey (free while beta)

[Bob65536]

Thanks for the suggestions. I looked again at the movies I converted and I saw a jump in the video where I merged the files. Encoding it as a single file looks like the way to go. This is my new sequence.


Get a list of all the VOBs.
Demux the video and audio with dgindex.
dgindex -IF=[VTS_01_1.VOB,VTS_01_2.VOB,VTS_01_3.VOB,VTS_01_4.VOB] -OM=2 -OFD=[mov] -EXIT -HIDE
Transcode the video with x264 and allow it to use its internal decoder.
x264-64 --preset slower --crf 19 -o mov.mkv mov.m2v
Mux the audio and video together with mkvmerge.
mkvmerge -o final.mkv mov.mkv --sync 0:X "audio DELAY Xms.ac3"



I have about 500 DVDs to encode. After I encode them I'm going to delete the rips from my hard drive. I had a fire and lost some of the original DVD discs so I want to be sure that I'm not going to have any issues with my encoded files.

I'm actually writing my own network encoder. I was encoding the VOBs separately to try to make it a little faster serving the DVDs to the clients from a single hard drive. But that is not going to work so it doesn't matter.

[Bob65536]

I encoded 100 movies using the steps outlined in my last post. I checked all the movies for video quality and audio sync and I found some problems with 7 of them.

A: Audio noticeably out of sync.
I: Visible video interlacing.
S: Strange behavior when seeking in VLC and Windows Media Player 12, and crashes Media Player Classic x64. Also installed K-Lite Codec Pack Mega.

Bad Lieutenant (http://www.themoviedb.org/movie/11699): I A
Girl With The Dragon Tattoo (http://www.themoviedb.org/movie/15472): A
After Life (http://www.themoviedb.org/movie/36419): A S
City Island (http://www.themoviedb.org/movie/28053): A S
The Crazies (http://www.themoviedb.org/movie/29427): A S
Pirates Of The Caribbean 2 (http://www.themoviedb.org/movie/58): S
Christmas In Wonderland (http://www.themoviedb.org/movie/14094): I S

Software:

DVDFab- Various versions over a period of about a year.
DGMPGDec- 1.5.8
x264- x86 and x64 r1698
mkvmerge- 4.2.0


Does anyone have any suggestions on how I might fix my problems? I would be happy to post screen shots, upload video clips, or log files. I'm just not sure what would be most helpful at this time.

Thanks