Why so long to Encode .vob to mpeg2 DVD than vice versa?

[petersenj20]

When I have a DVD compliant mpeg2 it will convert to DVD in about 40 minutes using Tmpgenc DVD author.

Why then does it take so long to convert the opposite way? ie., .vob files to a DVD compliant Mpeg 2? This would be very little compression wouldn't it? this takes about 30 hours compared to about 6 hours to go to a vcd which has a lot of compression.

Just curious, and hopeing its not PFM.

[dafreak]

I don't quite understand.
how are you doing the conversions?

you should just be able to demux vob files using vobedit.
you should end up with with m2v file and an audio stream.
multiplex the m2v with the audio and you'll have your mpg file.

[ZippyP.]

How are you converting your VOB's to mpeg? If you're re-encoding then that can take a long time depending your hardware, software and your settings.

Vobedit can extract the audio and video from a VOB, remux to create an mpeg. Womble mpeg2-vcr can create mpegs from VOB's in minutes.

[petersenj20]

I was trying to re-encode with Tmpgenc. I dont have Vobedit and will have to download to try.

I tried to do this with Tmpgenc's Mpeg de-multiplex and multiplex function. It worked on the first .vob file, but not on the 2,3, or 4th. Any idea why?

Thanks.

[dafreak]

you can also de-multiplex the vob files using tmpgenc, but when you rip the dvd to your hd, make sure to turn off file splitting in dvddecrypter.

[ZippyP.]

I was trying to re-encode with Tmpgenc.

With a 450 MHz CPU that will take a long time! If you avoid re-encoding it will not only be faster but you'll get better quality too!

[dafreak]

yeah, encoding will be pretty painful.
it takes me about 2 hours to encode a 30 minute avi to mpg2, using 2-pass vbr. I have a pentium 4, 1.4 ghz.

[petersenj20]

Allright then. Useing Vobedit I was able to demultiplex the vob. Now I have a .m2v file and an .ac3 file. I seperately demuxed by ticking mpeg and ac3 - respectfully. How do I remux? When I go through file on the menu it only asks for the .m2v file and not the ac3. And it asks for the new vob name. I dont see any guides on the tool page. WTF? Am I retarded and missing something? (Have you seen my baseball?)

[GbMedusa]

What you do next depends on where you want to end up.

If you are aiming for DVD, most authoring tools will accept the elementary streams (m2v/ac3).

If you just want to have a muxed video file to play on a PC, you will need an encoder that will accept ac3 streams. TMPGEnc has an AC3 plugin that will allow it to read the ac3 audio file. Then you can simply merge the two back to one.

Or you can use an app such as BeSweet to change the ac3 to mp3 (mp2?) or wav and then merge with the m2v in TMPGEnc.

[dafreak]

what are you trying to accomplish with these files?

[petersenj20]

I'm trying to put vob clips on to DVD. I cant get Tmpgenc DVD author to except them directly. I thought I read somewhere this can be done.

[dafreak]

when you try to import vobs into tmpgenc dvd author, are you clicking on import dvd clip or using the other option?

I just made a dvd the other day and imported vobs just fine using tda.


anyway, since you now have an m2v and an ac3 file, you should be able to import the files into tda.

just click on add clip
browse to where the m2v file is located on your hd, for the video portion.
browse to where the ac3 file is located on your hd, for the audio portion.

[GbMedusa]

To import VOBs into DVD Author, you still need the IFO/BUP file structure. It will not import "bare" VOBs.

[petersenj20]

I did not use the import DVD option.

Using TDA to import my .m2v stream pops up a window that says it is not mpeg compliant and will not except it. Could I have extracted incorrectly using vobedit?

Will not having the ifo/bup files effect this import of the .d2v stream?

[dafreak]

what did tda say was wrong with the file? how was it not compliant?

[petersenj20]

Follows is TDA reports in the details. I redid the demux with vobedit. Still no good. I tried to rename .vob to .mpg no dice. I'm lost.

" *This is an illegal video file

This is an illegal video file.
For DVD-Video you can only use the following video formats:

MPEG-1 Video, MPEG-2 Video


TMPGEnc DVD Author does NOT have MPEG encoding abilities.

AVI format(*.avi),RealMedia format(*.rm),WindowsMediaFile format(*.wmv, *.asf),etc. can only be used after they have been encoded to MPEG-1 or MPEG-2 format.

Users of TMPGEnc DVD Source Creator or TMPGEnc can create MPEG files based on the DVD standard by using the DVD template in Project Wizard.
(To encode in different formats requires the various codecs.)"

[dafreak]

try to multiplex the two files before importing them into tda.

open up tmpgenc.
click on file=>mpg tools
choose the multiplex tab
browse to where m2v and ac3 file is located on your hd.
click on start

after it is finished you should have one mpg file that you should be able to import into tda.

[petersenj20]

Won't work. I have 5 vob files from a home video that was authored. I have only the vobs. I was able to demux only the first vob (using Tmpgenc Plus) It works fine in TDA. None of the other 4 vobs will demux properly or reload to remux. (I tried Tmpgenc and Vobedit. Both failed)

I am guessing something is wrong with the vobs themselves. I cant recopy the disk as it is at another family members house out of state now.

All the vobs play in Intervideo Win DVD so maybe it is just missing some info. I guess its a lost cause. Is Frameserving and re-encoding my only remaining choice? This will work as I have started to do this once already, but 1 hour into and 29 remaining I cancelled.

[Gazorgan]

I bet you have a single harddrive. So your reading and copy 4 GB's from and to the same drive. I usually take 20 Minutes in TAD for a full homegrown DVD (all fully compleint), using 2 drives. It takes over an hour if I author with VCD's (Audio conversion required). It takes 35 minutes if I go to/from the same drive.