Mpeg settings question

mghia · Post by **mghia** » Tue Mar 21, 2006 8:53 pm

Hello,
I am using VS 7 SE and am curious about some of the mpeg settings

Is there a tutorial on what these items are for and their definition.
Feild based A
Feild Based B
Frame based
and
"output deinterlaces" check box.

If you know when these are used I would appreciate the information.

I am currently trying to copy some analog VCR tapes to DVD.

Also is it recommened to select the stated default bit rate as constant or use the variable? Any info on the difference it makes is appreciated.

I am going from the RCA composite jacks to an S-Video adapter on my video card.

Which should I choose in the set up menu, COMPOSITE or S-video? The sourceis not in S-video but the adapter that goes into the card is.

For audio, which is recommended MPEG audio or LPCM if those are my only choice? Is there a noticable difference? Does one save more space over the other?

Does one play in more machines than others? I have heard that many DVD players do not play the mpeg audio. Try? I know in the test burn I did it would only if I set the audio to Dolby/PCM if I did not and left it on the STREAM setting the disk burned would not play the audio.

Thanks

BrianCee · Post by **BrianCee** » Wed Mar 22, 2006 11:25 am

This article may help you :-

http://www.creativecow.net/show.php?pag ... index.html

..

mghia · Post by **mghia** » Wed Mar 22, 2006 3:59 pm

Thanks
This explains a little more about feilds but not in the sense of Ulead VS
What I am not sure of is if my source is analog then I assume I should be choosing upper feild. But if the final output is DVD for NTSC tvs than Do I have to change the output later?

AND many people now are watching a DVD on their computer. So would I then have to have a separate DVD that was frame based or does somet hing get universely changed when it encoded as a DVD?

SO is better to deinterlace so it is framed based and when you go to burn interlace it or do you have to have two separte files for the different types of possible outputs.

I also found this site educational but it did not quite address my questions but very visual.
http://www.100fps.com/

Post by **Ron P.** » Wed Mar 22, 2006 4:12 pm

Hi,

No you don't change the properties, meaning the Field of your project. Try keeping the properties the same throughout your project, from capture, to edit, to create video file. Then when you are going to burn a DVD, provided when you created a video file, it was DVD -compliant, there is no need to mess with the properties. Because all you are going to do at this point, is to create menus, chapters, titles for your dvd, then put the finished product onto a DVD disk.

No you don't need a seperate DVD player. DVD players play discs reading VOB files that area created when the disc is burned.

Deinterlacing is used for when the video or disc is primarily going to be viewed on a PC. Televisions use interlaced video.

That is a very simplistic explaination, I think to give a real detailed one, would only succeed in confusing you...

Ron P.

mghia · Post by **mghia** » Wed Mar 22, 2006 5:26 pm

Thanks.
So are you saying that the LCD tvs out there are interlacing an image? Does this apply to people who use a large LCD or crt computer monitor as a TV?

DVDDoug · Post by **DVDDoug** » Wed Mar 22, 2006 8:25 pm

I'm not sure if some TVs deinterlace... But "regular" NTSC and PAL video are always interlaced. The broadcast is interlaced, and the composite-video and S-Video signal that comes out of your DVD player or VCR is interlaced. The component-video output can be progressive-scan (non-interlaced) ...I'm really not sure if it always is.

sjj1805 · Post by **sjj1805** » Thu Mar 23, 2006 1:25 am

Thinking logically I wouldn't think it makes any difference if your TV set has a CRT (Cathode Ray tube) or is LCD (Liquid Crystal Display.)

Think of it like this.....
Its a TV set so it is picking up TV transmissions.
Those transmissions are only in one format (interlaced.)

Steve J

THoff · Post by **THoff** » Thu Mar 23, 2006 2:09 am

There is a difference between traditional CRT-based TVs and plasma or LCD TVs -- the latter don't have a need to sweep the display with an electron beam, and display the entire image from a frame buffer just like your computer does. The deinterlacing is implicit, even though the TV signal from which the frame buffer gets filled is interlaced.

Post by **Ron P.** » Thu Mar 23, 2006 3:36 am

THoff wrote:There is a difference between traditional CRT-based TVs and plasma or LCD TVs -- the latter don't have a need to sweep the display with an electron beam, and display the entire image from a frame buffer just like your computer does. The deinterlacing is implicit, even though the TV signal from which the frame buffer gets filled is interlaced.

So as a general rule of thumb, since the LCD/Plasma TVs deinterlace on their own, if your video is going to be viewed on a TV, then deinterlacing is not required correct?

So to lessen confusion...

Ron P.

sjj1805 · Post by **sjj1805** » Thu Mar 23, 2006 3:53 am

Here is another thought....
Are you only going to produce ONE copy of your DVD and use it in just YOUR LCD/Plasma TV set, or.... are you producing other copies for friends relatives (or customers if your a Pro) and will the users of ALL those extra copies also possess a LCD?Plasma TV set?

Steve J

sjj1805 · Post by **sjj1805** » Thu Mar 23, 2006 3:55 am

Duplicate removed

mghia · Post by **mghia** » Mon Mar 27, 2006 2:36 am

Ok so I guess I missed the answer to my initial question. Is feild order A the same as UPPER feild order?
Thanks

Post by **Ron P.** » Mon Mar 27, 2006 2:40 am

Hi,

No, Field Order A is Lower Field First. I try to remember them like this, working from bottom to top, or Lower to Upper. A is before B. So Field Order A is Lower, Field Order B is Upper, most of the time. There are some exceptions..

Ron P.

mghia · Post by **mghia** » Mon Mar 27, 2006 1:45 pm

crazy engineers... We normally do things TOP DOWN and LEFT TO RIGHT.(At least the US majority does)
So on the top down I assumed A was first and not on the bottom.
Good to know Feild order A is lower. Thanks

GeorgeW · Post by **GeorgeW** » Mon Mar 27, 2006 1:54 pm

Just keep in mind what Ron said -- there are exceptions...

For instance, there are versions of TMPGenc that use FIELD-A for Upper Field, and FIELD-B for Lower Field first...

Ulead dropped the Field- A/B reference a while ago, and they moved to Upper and Lower to make it easier to follow...

Regards,
George