.MPG to DVD?

[mark63534]

I've been googling forever, and can't seem to obtain the answer to this question. When you convert .mpg to DVD/.vob, do you lose quality?

So far all I've found is "you can rename .vob to .mpg".

P.S. I am attempting to make a 8 episode dvd using DIKO, but DIKO doesn't support mkv. So, what I'm doing is I am converting the mkv(avc) to avi, then to mpg. The problem is I don't know if I lose quality twice (avi to mpg, mpg to dvd) because converting from mkv to avi I really dont lose that much quality when using xvid4psp.

[AlanHK]

I've been googling forever, and can't seem to obtain the answer to this question. When you convert .mpg to DVD/.vob, do you lose quality?

As long as the MPEG is the right format -- see https://www.videohelp.com/dvd#tech -- using it to author DVD is lossless.

So far all I've found is "you can rename .vob to .mpg".

Which is true, but misleading if you think it means they're the same thing.
Better to use a demuxer like PGCdemux, or VOB2MPEG.
A VOB contains an MPEG, but also has other structure, so you certainly can't rename MPEG to VOB.

P.S. I am attempting to make a 8 episode dvd using DIKO, but DIKO doesn't support mkv. So, what I'm doing is I am converting the mkv(avc) to avi, then to mpg. The problem is I don't know if I lose quality twice

Yep; these are lossy conversions.

I don't use Diko, so don't know if it can be fed MKV. However, I understand it uses Avisynth, which can load MKV, so there should be a way to do so if you can edit the AVS files it makes.

[mark63534]

I don't use Diko, so don't know if it can be fed MKV. However, I understand it uses Avisynth, which can load MKV, so there should be a way to do so if you can edit the AVS files it makes.

I've kinda thought about this, and figured there's no other way then to do a 5 episode dvd, which retains quality (using convertxtodvd) or go 8, which results in more episodes. The problem is, I'm big on quality, and if I see a video with "blocks" I figure it isn't a good quality video. So, I really need some guidance on how to make this dvd keeping some type of quality with at least more than 5 episodes.

P.S. 7 is doable, 6, I don't know, but 5 is too little for a dvd5 itself.