Ripping DVD without compressing or loosing quality

[banzemanga]

Well here is the challenge for me. I have been looking for some software that would help me rip the dvds (sometimes cutting some scenes) such that it will maintain the original mpeg-2 quality with no compressions and so on.

The one i am currently using is TMPGenc MPEG Editor. It does most of the job including cutting scenes. The problem is the encoding part. It does some minimal encoding which sometimes in vbr transcoding, makes the video look like freezing at certain frames. If i use cbr it does fix that problem; however, as far as i know the original quality in dvds are vbr and i read some about vbr being better than cbr.

-Is there really quality lost when enconding in from vbr to cbr?
-If i convert a cbr converted video to vbr, will i get the original vbr file?
-Is there any other alternative in ripping videos conserving the original qualities? (i tried dvdriper and smartripper which i preferred smart ripper because it showed me key frames where i could could cut scenes clean but it did not rip with the original quality)

[Inspector.Gadget]

If you want "original mpeg-2 quality", just don't transcode. Rip the DVD to your hard drive as a VIDEO_TS folder with DVD Decrypter or DVDFAB HD Decrypter. If you want to edit the DVD structure, use something like PGCEdit.

You can also rip a program chain as one VOB with DVD Decrypter, extract the audio and video with DGIndex, mux to Matroska (applying the proper audio delay in MKVMergeGUI) and then cut and paste scenes using MMG's splitting and concatenating functions.

[Betsy25]

Can't you do exactly that using DVD Shrink ? Extracting everything you need without using compression ?

[banzemanga]

Ok... so here i go again using DVD Decripter. It actually does not difference as copying the VIDEO_TS folder to the harddrive.

Then i try to use PgEdit, but it is too complicated and i don't see real-time preview to cut the scenes (although, it is good at detecting key frames). Then what the programs does is to edit the structure of the dvd. While what i want is to export the video into a MPEG-2 file.

Muxing and Demuxing the videos are too much of an hassle and i don't want to change the file structure into mkv container.

I just want to take the originals .VOB, merge them (becasue they are various VOB files) and cut them into one MPEG-2 file for each of the respective chapters that are found in the keyframes.

[manono]

VobBlanker can cut out scenes without reencoding anything. Here's a guide:

http://jsoto.posunplugged.com/guides/VobBlanker/prevcut/index.php
I just want to take the originals .VOB, merge them (becasue they are various VOB files) and cut them into one MPEG-2 file for each of the respective chapters that are found in the keyframes.
Your first post lead me to believe you wanted to cut out stuff while maintaining the DVD structure. This is something very different.

In VobBlanker, by getting the movie to the lower screen and clicking on the cells button, in the new screen you can save the various cells (chapters) as VOBs. Perhaps an easier way is to do it from the beginning. Set up DVD Decrypter in IFO Mode and choose the chapter to decrypt. Decrypt each to its own folder. With the DVD already on the hard drive, another way to get chapters is use PGCDemux set up in Single Cell Mode and the "Create A PGC VOB" box checked.

If you want to convert VOBs to MPGs, use VOB2MPG:

http://www.videohelp.com/tools/VOB2MPG

[banzemanga]

I apologize for my post being confusing. Yea, i don't want to change the structure of the DVD. Rather, i want to extract specific chapters from the DVD with the original quality and format.

Well, i still think that the process it a little too complicated. One of the reason is because the cells and chapters specified on the DVD structure is not quite in order so that when i extract it with DVD Decripter in INFO mode, does not necessarily give me the parts i want. And the previews from VOBBlanker has now audio which also makes it hard to find the correct chapters. (sorry i am complaining too much but try TMPGenc MPEG Editor and you will get what i mean)

But still, thanks for the responses. I will continue to try them. By the way, back to some of the previous questions i had.
-Is there really quality lost when enconding in from vbr to cbr?
-If i convert a cbr converted video to vbr, will i get the original vbr file?

Is it possible to convert from vbr to cbr in lossless mode? According to the program i use, it does cbr mode in lossess encoding. But i am a little skeptical because i have used various programs for the same function and they tell me different things once in a while. (like GSpot and MediaInfo to tell me information about a media file) The problem with cbr is that it is not in original format since it is cbr while the dvd is vbr.

Edit: Never mind about how to extract the chapters. I found the way using the programs you guys specified me. (Thanks a lot, i am very grateful) Although, 3 programs vs 1 program is a little of an hassle. XD

By the way, i still wonder if of the 2 questions about cbr and vbr:
-Is there loss of quality for conversion from vbr to cbr?
-Is it possible to do lossless vbr to cbr conversion?

[manono]

-Is there really quality lost when enconding in from vbr to cbr?
All reencoding loses quality, unless reencoded as lossless like for Lagarith AVI, in which case the file size zooms. There's no reason to think that going to CBR would be any different.
-If i convert a cbr converted video to vbr, will i get the original vbr file?
Of course not. The result will be a doubly degraded file.
Although, 3 programs vs 1 program is a little of an hassle. XD
Eh? Between me, Betsy25, and Inspector.Gadget you got 3 different ways to accomplish the same thing. For example, selecting and decrypting by chapters when using DVD Decrypter is using 1 program for the job. If you have trouble figuring out which chapter to decrypt, play the DVD in PowerDVD with the OSD on so you can see which chapter you want.

[banzemanga]

lol. If i use PowerDVD to check the chapters, that would be one more program to use. XD

Anyway, i managed to learn how to use VobBlank better and so i decided that i could just use this program instead of first decripting, then extract the vobs and convert them to mpg container (i myself forgot that those 2 containers are different format, so now i am just keeping it into plain vob format). The only thing is that i have to figure out a way to detect dual audios when extracting the parts.

So pretty much i have my job done in keeping the original source of the DVD but in files have the right split of scenes and chapters.

Thank you very much, specially manono. ^^

P.S.> The CBR and VBR lossless conversion topic is interesting. I think it is theoretically possible but only if the reverse engineering of the algorithm is done in the right order which is most likely not to be true in the majority of the programs.

[Inspector.Gadget]

Given that MPEG-2 is a lossy codec, it is in fact not possible to do lossless conversion while adhering to MPEG-2 standards. The same applies to MP3, MPEG-4 ASP, etc.