Best quality MPEG parameters on UVS9

[Nounours18200]

Hello,

When I burn a DVD under UVS9, there is a possibility to choose between different MPEG parameters just before starting the disc burning.
I would like to know what are the MPEG parameters that ensure the highest quality (no matter the volume). There are 2 HQ options:

The 1st one indicates:

HQ 4:3
MPEG files
24 bits, 720x576, 25fps
DVD Pal 4:3
Variable bitrate, max 7000 kbps
Audio LPCM, 480000Hz stereo

The 2nd indicates:
HQ 4:3 (20mn/1.4G, 60mn / 4.7G, 100mn/8.5G)
MPEG files
24 bits, 720x576, 25fps
based on "trame"
DVD Pal 4:3
Variable bit rate, max 7000 kbps
Audio LPCM, 480000Hz stéréo

I suppose that the 2nd provides the best quality, (because it is more space consumming than the 1st one), but I would like to be sure that it is the highest possible quality.

In addition, when I convert a 58mn flm in this second format, UVS generates a 3.75Gb only file, whereas UVS9 indicates that 60mn should normally generates around 4.7Gb ?? Is there another parameter that I have forgotten to adjust ?

Thanks friends,
N.

[sjj1805]

Please view
http://phpbb.ulead.com.tw/EN/viewtopic. ... ght=#56707

[Ken Berry]

Nounours -- in addition to what Steve has referred you to, you need to be aware that the two settings you have included in your post, are slightly different in their objective. The first is obviously meant for a High Quality DVD (though what you have listed for it does not include the important question of Field Order -- Lower Field First, which would be normal for most digital source material, or Upper Field First when the original capture was from an analogue source). I would also more normally use 8000 kbps as the maximum bit rate for a HQ DVD using digital source material. (I would also be using Dolby AC-3 as the audio format, instead of LPCM, which would mean that I could fit a bit more than the one hour on a single layer DVD, which is what these parameters would normally indicate.)

The second set of parameters has the important difference that it uses 'Frame Based' as the Field Order. Depending on what you are burning and what you intend to play it on, Frame Based is normally used for producing slideshows of still images... As far as I am aware, in addition, this line -- "HQ 4:3 (20mn/1.4G, 60mn / 4.7G, 100mn/8.5G)" -- is meant to be indicative only. In other words, a rough guide to what size files you can fit on a disc. Thus, 20 minutes of video using these properties would normally take up about 1.4G, 60 minutes would fit on a single-layer disc, but 100 minutes would require a double-layer disc. I don't think it is meant to provide an exact reading of the file size a particular project will actually produce (which in your case is smaller...)

[Nounours18200]

Thank you very much Ken for the info: it is clearer now....(most of the time I encode analog sources, captured from analog TV).

One more question, you said:

I would also more normally use 8000 kbps as the maximum bit rate for a HQ DVD using digital source material.

but the max bitrate I have mentionned (7000 kbps) is given by UVS9 in the pre-defined MPEG settings list, not by me...

Is it possible to force a desired bitrate ? (I have not seen this possibility before, and UVS is actually busy for encoding...).

Thanks a lot,
N.

[jchunter]

Nounours,
The top sticky post that Steve referred you to explains that users have to take full control of their video and audio properties when capturing, editing, creating video files, and DVD burning. Never trust default property settings because they may not be appropriate for your situation. Failure to manage property settings usually results in bad video quality and lots of frustration.

[Ken Berry]

Nounours -- if you look at Make Movie Manager, and select one of the formats, you will see on the new dialogue box which appears, there is an Edit button. This will allow you to change various elements of the template, including bitrate. You can also create your own template by selecting Add which also appears in the same dialogue box.

[Nounours18200]

Jschunter and Ken : thank you all very much. As soon as the current encoding is finished, I check for the "Edit" dialog box you mentioned: I have been missing this kind of control over the parameters...