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Qualitätsunterschiede MPEG1 aus DV-AVI oder AVI von DVD

Differences in quality from DV-AVI, MPEG1, or AVI of DVD



Frage von Olli (ratlos):
Oktober 2005

Hi All,

I can find out when the Newbie Forum search that one in the conversion of DV-AVI to MPEG1 at 1150 kbit / s can expect a rather poor quality. That's what I have to say, unfortunately, synonymous in person (I have used the TMPGEnc).
However, I receive if the conversion of a DVD of lessons AVIs (eg via DVD2AVI) at the same settings in TMPGEnc is a much better quality.

Is this or is it possibly be explained by a handling error on my part??

Thanks Oliver ...



Antwort von gaddagah:

The quality should actually both the same and the DVD material be even worse, since DVD not mean that it is already encoded in MPEG2, and thus have once more compressed than DV. I can only imagine that since you have chosen something other settings.
What do you want to encode the whole thing? And why do you take MPEG1 and MPEG2 or not, depending on application, DivX or WMV, etc. ..



Antwort von Stefan:

@ Olli (loss)

Is quite possible. I could imagine for example that it is difficult to encode a fully knackscharfes DV video image such as a movie scene with carefully sedate depth. A fuzzy dramatically sedate background would cost the encoder s.Bitrate little something ...

Good luck
The fat Stefan








Antwort von Olli (ratlos):

@ Gaddagah

The background is that I only just beginning to want to convert some DV shots so that they are on a standalone DVD player can be looked at.
Since I is currently no DVD Burners and we possess in the conversion of FILM-DVD (eg MPEG1 with TMPGEnc in 1150 kibt / s) achieved very satisfactory results can, I am very puzzled why this does not work in this case! !

Anyone else an explanation?

Thanks .. Oliver



Antwort von Martin:

How noisy is because the DV-Picture? Larger noise deteriorates the results when compressing. Generally speaking, the detailärmer the Picture, the better the result after compression. Unfortunately, noise is synonymous as a detail.

Greeting
Martin



Antwort von Nightfly!:

Hi Olli!
Two cases:

Case1
If I judge according to your text, you've got:

Aktion1: AVI ----> MPEG1
Action 2: DVD ----> AVI

In this case, MPEG1 (AVI) would obviously be worse than AVI (DVD), because with a reasonable AVI codec is the quality order is as follows:

1. AVI
2. DVD (MPEG2 =)
3. MPEG1

If you Aktion1 country as the No. 3 while you're at about half with the Action 2 AVI codec's place 2nd

Case2
If you searched for Action 2 but not AVI MPEG1, thus:

Aktion1: AVI ----> MPEG1
Action 2: DVD ----> MPEG1

In this case, one would have to take a closer harmony with each other as the codec of your pictures here.
Possible source of errors is of Martin as already mentioned a noisy picture.
A Comparison and such an analysis, I can not afford here.

BUT why are you doing with no SVCD MPEG2? Or if the DVD player to Support a MiniDVD. Depending on the length of your movie that could synonymous still fit on a CD.

Greeting
Nightfly



Antwort von Olli (ratlos):

@ Martin
The DV-picture is actually very clean!

@ Nightfly!
I have actually taken place in case 2 and the additional Comparison Case 3:
Case 3:
Aktion1: ---- DV-AVI> MPEG2
Action 2: DVD ----> MPEG2

Here too, the result of Action 1 is far worse (strong noise or "Blöckchenbildung" as of Action 2

As I said at present DVD Burners is not available, but I thought that I should get here on synonymous MPEG1 / 2 similarly good results as when converting a DVD to this format.
So I would be happy!

Olli??



Antwort von reto:

"Olli (loss)" wrote:
@ Martin

As I said at present DVD Burners is not available, but I thought that I should get here on synonymous MPEG1 / 2 similarly good results as when converting a DVD to this format.
So I would be happy!

Olli??


Sorry, here I am referring, of course, still at a bit rate of 1150kbit / s (MPEG1) or 1300kbit in my case / s (MPEG2)!

Thanks Olli ...



Antwort von Markus:

Hi All,

It has been previously discussed compression and data rates. What resolutions have you the various AVI, MPEG 2 - and MPEG1 files? MPEG1 has not mandatory only VCD Resolutionhaben ...



Antwort von Olli (ratlos):

Hi Mark,

I already speak of a VCD standard resolution compared with the lessons!

Well, I am the AVI file again can exclude Convert to possibly setting mistakes - but AVI codec confirmed to me at least the most important settings (bitrate, resolution ...)

So, a new and thanks for the



Antwort von Martin:

Maybe helps a Zwischencodierung on a common, lossless format next (eg Huffyuv). If the temporary produces comparable results, at least, is s.Material's not.

Greeting
Martin



Antwort von Kiara Borini:

"Olli (loss)" wrote:
However, I receive if the conversion of a DVD of lessons AVIs (eg via DVD2AVI) at the same settings in TMPGEnc is a much better quality.


What I could imagine is that the MPEG2-source (DVD) already been deinterlaced when generating. Then you can code when converting to MPEG1 at the same data rate is certainly better.

Trying times, such as deinterlacing with VirtualDub before. TempGENC has I think I recall that synonymous appropriate function. If the result is then compared?

It is possible, but synonymous, that have already occurred MPEG2 Konveriterung (let's assume, for simplicity, the intermediate step of DV-AVI is lossless) as a 2-pass encoding works. The differences between the frames have been normalized in the DVD encoding and can now pack that is lighter with less compression at the same rate.









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