Converting DVD-Rip to Mpeg

[Tyrion763]

Helo folks, im new to the DVD-ripping scene i recently bought a Sony 16X DVDRW dual layer writer. it works great and i can do pretty much eveything with iut. i can burn my Mpeg video files onto DVD fine. and with your DVD decrypter program i can get files from a DVD onto my computer. I have 2 questions that i would like to be answered if you guys can help me. my question is why is my video file on my computer say 700MB or so, but when i burn it on a DVD it says its more then 3GB in size. thats odd i thought it could hold 4.7 GB of information. Question 2 is after i burn my video file on a DVD i can decrypt it to put it back on my computer the porblem is it isnt a MPEG file it is a bunch of files that say Video and audio TS. I ouwld like to know how to put it back to its oringinal 700MB file in MPEG form. anybody that can help me with these questions would be helpful.

[Draygon]

I dont know the technical answer as Im still new to all of this as well, but I dont believe its possible to do the full movie in MPEG format in 700meg unless its very crappy quality.

[SallyDog]

:readguid:

[Tyrion763]

i have tried to read the guides i went through them and these are my only two questions i have left. i thought it was a little ridculous not not let me post for 5 days i had already looked pretty much through the site before registering no point in going to the forums unless what i want is not somewhere else anyway

[CWR03]

When you are burning your AVI to a DVD, you are burning it in standard DVD format which converts it to a totally different media. It is transformed to MPEG-2, which is typically 4.7 gb for two hours of video, regardless of the original file size. Instead of burning a DVD video disc, you should be burning a DVD data disc, basically backing up the file(s).

[echooff]

Simply burning a avi does not convert it to a mpeg. That must be done with a encoder prior to burning. What dvd authoring software does is place the mpeg video, any audio that accompanies it, subtitles, title screens, warning screens, ect. into a vob container that is required for dvd players. Burning a avi to a dvd, just like burning a mpeg to a dvd is making a data disk. Some dvd players can read these. The guides will tell you a standard dvd has a AUDIO_TS and a VIDEO_TS forlder. Inside the video folder are 3 kinds of files: ifo or information(tells the dvd player how to read and navigate the vob), bup or backup(for the ifo), and vob explained above. AUDIO_TS is for audio dvds. Not to be confused with something like Pink Floyds Pulse, which has video. Be advised: a avi file, like a glass containing water or milk, is also just a container for video and audio. Keeping this clear in your mind makes the rest of this a little easier to understand.

[CWR03]

Originally posted by echooff
Simply burning a avi does not convert it to a mpeg.

I never said that; I said that's what he's been doing.

[echooff]

Guess I could have answered the questions while I was at it.

1. Your avi encode is probably encoded with (I'm guessing here) divx or xvid. These codecs allow a much better video quality with a smaller file size. When converting to mpg, a 700 mb xvid encoded video will typically morph into a 3 to 4 gig file unless you deliberatly limit the file size. Should you do that you will lose quality. Read the guides for a more indepth explaination on bitrate. You dvd allows you to place about 4.3 gigs of info onto the disk. The rest of the 4.7 gigs is eaten up with disk overhead.

2. When you decrypted it you did it in file mode, so you got the files from the disk. Had you decrypted it in stream copy you would have gotten a m2v(video) and some type of audio(ac3, pcm, mp2, dts). these could be muxed together to make a single mpg. Based on the info you gave, my guess is the file size would be about........3 gig.


People use the xvid and divx (there are others, just trying to stay general) codecs is because they allow you to compress a 5 gig mpeg video to around 700 mb with, IMHO, impressive quality.

[echooff]

I never said that

When you are burning your AVI to a DVD, you are burning it in standard DVD format which converts it to a totally different media.


Maybe not, but it reads that way to me. Since he is in the newbies forum I wanted to be as clear as possible.

[CWR03]

He is presumably using something like Roxio DVD Builder - if I drag-and-drop an AVI into it and click Burn, it re-encodes it into a standard DVD.

[echooff]

True. I not trying to make you look bad or unknowledgable. I'm trying to lay out the actual process so he knows what is really giong on. He apparently did not know his program (for the sake of discussion lets say Roxio) first encoded his avi to mpeg and then placed it into a vob container, then burned it onto a dvd. That is why I said it the first time and repeated it just now. Hopefully he is reading his thread and obtaining the information he wanted.

Edit: should have spell checked.

[Tyrion763]

thank you guys for helping me. i might have some more questions in the future my email is tyrion763@hotmail.com just so you know im using Nero and for CD burning nero was easiest for me. And for DVD burning it seems that way too. most of my files are divx encoded and i would like to do that with my DVD collection to back them up on my computer. Also how long does it typically take for you to burn a file of the size im using. im burning at 4X and it takes about 80 minutes. the reason im asking is because i read an article in PC world saying that SP2 for XP made Sony and other DVD writers take longer to write DVD's.

[echooff]

As far as the burning time goes, my old 2x used to take about 40 minutes for a full 4.3 gig dvd. My 8x uses about 15 minutes. I don't use nero anymore for burning dvds. I use the burning tool that comes with Tmpg Dvdauthor. I've never had a coaster since starting to use it. Since it works for me, i'll stick with it. If you have more questions you can pm me but why not go ahead and ask in the forum. That way others can benefit from your inquires. If I understand your last post correctly, you want to back your dvd collection to divx on you computer. In that case, I recommend AutoGK. Life doesn't get much easier that this. Dvd goes in one end, Avi comes out the other :p

Edit: I am using sp2 and don't see a change in anything. I usually don't do much e-mail because I forget to check it. I sometimes go a couple of weeks before I remember. Should you still want to knowing that feel free.

[Draygon]

Im not trying to hijack this thread but I had a question along some of the same lines. I keep hearing people say that a normal 700meg divx file that it grows to over 2gig+ once its encoded into MPEG2. Im using TMPG to encode my avi files. Im confused as to why Im getting a movie with a max size of 1.5gig - 2gig. They burn and play fine, so Im just wondering if Im doing something wrong or if its something different.

[echooff]

No. You are fine. It depends on your options. Are you encoding full half or quarter(740x480, 352x480, 352x240), what is your bitrate, ect. Are you happy with the finished product? That is the true test.

[Tyrion763]

echooff,

hey could you send me that program. nero keeps taking 80 minutes at 4x thats just to long. also echooff if you could give me the exact instructions to chnage the DVD files i rip into one file that is divx encoded. thanks

[CWR03]

Tyrion763, the reason it takes you 80 minutes to burn a DVD is because the program you are using is first re-encoding the file to MPEG-2, which is a slow process. That's the only reason why you get Video_TS folders and such when you rip it back to your drive.

After you burn these files to a DVD playable on a standalone player, back them up to a data DVD before you delete them from the drive. That way there will be no reason to re-encode them again to .avi, which is time-consuming and will further reduce the quality.

[Tyrion763]

thank you sir