Converting PCM to AC3 or MP2 without losing menus

[lemmy999]

I have a dual layer DVD where the video is only about 1:30, but the audio is PCM instead of AC3 2.0 or MP2. Since the audio is so large, DVD Shrink has to do nearly 65% compression to fit it onto one DVDR. I am attempting to convert the audio to AC3 2.0 or MP2.

First I ripped the entire DVD to HDD with DVD Decrypter. Then I thought I would take each VOB (1 at a time), demux, encode the audio, then remux. So I used Womble MPEG2VCR to demux (TMPGEnc wouldn't demux it, it acted like it thought there was no audio stream). Nothing will play the audio file, but I can import it as raw PCM into CoolEdit Pro (48Khz 16 bit Motorola) and it plays fine. I then save this as a WAV file. Then I use Softencode to convert to AC3. I then remux with either Womble or TMPGEnc and the audio and video are slightly out of sync. So I tried using BeSweet to conver the WAV file to MP2, then remuxed and I had the same sync problem. When I play the ripped VOBs, the audio is in perfect sync. Does anyone have any ideas of why I am having sync issues, or a better way to do this?

[jimmalenko]

IIRC there is a guide in the guides section that does exactly this, although I had a quick check and do you think I could find it ?

[jimmalenko]

Found it

https://www.videohelp.com/guides.php?guideid=667&howtoselect=6;57#667

I think you lose menus though

Might have to try something like DVDRemake (Pro) ?

[lemmy999]

Thanks. I searched but didn't find that guide.

[johns0]

Found it

https://www.videohelp.com/guides.php?guideid=667&howtoselect=6;57#667

I tried the guide and replaced audio and it worked keeping menus,why search when jimmalenko gave you the url?

[jimmalenko]

Found it

https://www.videohelp.com/guides.php?guideid=667&howtoselect=6;57#667

I tried the guide and replaced audio and it worked keeping menus,why search when jimmalenko gave you the url?

I was thinking the same thing, but I didn't want to mention it

[lemmy999]

What I meant was I searched through the guides for something that might help me and didn't find anyting. This was before I posted. jimmalenko found the right guide and posted the link, and I thanked him. Sorry for any confusion.


However, I have one issue that might cause a problem. The guide says to open the IFO file and save the celltimes.txt. But what if the one VTS set (VTS_01_x.VOB) have 4 different videos in them, not just one main video. The main video is 01:22:35 and the others are just a few minutes each. Each have a celltimes file that I could save, but when I remux I can only bring in one. If all this means is that I lose chapters on the 3 short videos then that is no problem.

[lemmy999]

Well, this ended up causing a problem. When using IFOUdate and I select "Update IFO" I get the error popup window:

The original IFO's PGC area is not large enough to hold the new PGC. Aborting

And in the IFOUpdate window:


New Authored IFO has 1 PGCs
Original IFO has 4 PGCs
-Processing VTS_PGC_1
-Warning: Source to destination mismatch
-Original time = 1:22:35
-Newly Authored time = 1:49:46
-WARNING:Source to destination mismatch
-Original file has 28 chapters
-Newly authored file has 29 chapters

[lemmy999]

Does this sound like a plan that might work?

1) Rip with DVD Decrypter File mode
2) Use PGCdemux to open the title set and then use it to demux and make 4 seperate sets of files (one for each PGC). This tool also outputs the celltime.txt files
3) convert the 4 audio tracks to AC3 2.0 with Softencode
4) Use IFOEdit's DVD Author function to mux AC3 audio with video and include the appropriate celltime.txt file for each of the for PGCs.
5) At this point I will have 4 title sets (one for each PGC).
6) Use VobBlanker to open the original DVD files, and replace each PGC with the appropriate new PGC files that I have made.
7) Use IFOEdit to open the original VIDEO_TS.IFO file and change the Coding Mode from LPCM to AC3.

Is there anything I am looking at incorrectly or some step that won't work? Thanks.