demuxing & quality

[hakeemshabazz]

Anyone who has seen my posts here lately, will realize they are mostly about keeping quality of the VOB files I'm working with (and I'm a newbie). From my limited knowledge I'm starting to believe I have to demux the VOB files in order to do some editing to them. My question is, if I do this, and edit the mpeg stream, then turn the streams back to a VOB file, do I lose quality?

Does demuxing in itself cause quality lose? I wouldn't think so, just because all you're doing is compiling all the streams back into a VOB...but I'm not sure. What about sync problems?

[FT Shark]

Absolutely not!!!! However, it is not recommended to edit video in mpeg format. You should convert to AVI then edit. After editing re-convert back to mpeg. This is where you will loose quality not from demuxing.

[hakeemshabazz]

I wanna thank you for your reply.

I do have a follow up question also. The only editing that I want to do is a fade in & fade out of the video (don't know if I have to bother with the audio yet). From what I have read, I thought I could fade in/out with the mpeg stream. I'd hate to convert to avi & lose quality...actually, I won't bother with the editing if this is the case. Secondly, can I add blank black frames to the stream without converting it? (that would work in place of the fade in/out for me).

Thanks again.

[FT Shark]

Those kind of minor edits should be fine in mpeg format.