Infoseite // DV Video worse than TV picture, why?

Frage von macrooky:

when I look at the video recording s.Television sees everything from super sharp (Panasonic NV-GS400) and in iMovie or FCE Canvas sees synonymous still in order from but when I export to a video (DV) 16:9 as in the Cam set the quality at 100% the original size is disappointing. The picture is blurred and shows artifacts s.den edges. Comparison is the picture worse than the television image of eyeTV on the calculator and which puzzles me because but the video should be better. Am I doing something wrong or is this normal? Should I use a different video format? Gruss Michi


Antwort von thos-berlin:

I understand your setup still not sure.

The GS400 is still a MiniDV Camera. The Picture via Firewire, you should write it into the calculator. There is nothing s.originalen data stream is changed, wrapped only in Eien AVI.

If you go via USB in the calculator, it can lead to deterioration which should however be seen to be synonymous aum PC already.

Quote: but when I export to a video (DV) 16:9 as set in the action, the quality at 100% Original Size disappointing

What you now exports of where to where and what. With what device you watch the result?

In principle, one should in my opinion as long as you edit the video format unchanged, thus making the entire process in DV (synonymous when it's free disk space). The finished end product and may present as a file of a processing then be converted into the desired format.


Antwort von KSProduction:

thos-berlin has quite

Editing via firewire into the computer and the left in the DV format. not convert mpeg to eg


Antwort von macrooky:

Thos Hoi, thanks for your answer. So I proceed:
Cam s.den MAC via Firewire and the data is read in via iMovie. Then I select different clips in a Project and export the data (export Quick Time) as DV. Then I look at the video (QT) in the original size.
In FCE I import the iMovie events, but so far only experimented a bit and made no Ausgangsfile. I will try it tonight.
In my view, is the process correctly and "DV" is likely to have the highest quality. Have a synonymous made on iMovie export file that is compressed, but visible and the quality is duplicated grotto.

To exclude a defect of the action, I will once synonymous material my old Cam (NV-GS75) output as DV.

Gruss Michi


Antwort von thos-berlin:

The Resolutioneines DV is 720x576. If you let the calculator on the show, it's not full screen, but it should be sharp. If the display is gewechslt to full screen, the picture is s.Calculator worse.

If you burn a DVD and are playing on a standalone DVD player or the DV can play back on a camera and move them s.Television viewing, there would be the picture perfectly.


Antwort von macrooky:

"Thos-berlin" wrote: The Resolutioneines DV is 720x576.

This is possibly the problem. The cam is set to 16:9 and the DV output (synonymous 16:9) is a 9xx Resolutionerstellt times 5xx. I thought that this just comes from the action. But 720/576 is 4:3 but if the cam and supports 16:9 but must get out more, right? It is already clear with the full screen, of which I speak not. I expect that the original Picture/Resolution1: a play should be sharp. Do I possibly add in Progressive mode? Would that improve the quality?
Gruss Michi


Antwort von immanuelkant:

are you sure you in the DV-Resolutionmit 720/576? I think I remember that the DV-Resolutionauf 480 lines was limited. 100% sure I am, however, not synonymous.


Antwort von thos-berlin:

No. DV is always 720 x 576 The difference arises from a different Ascect ratio at 4:3 and 16:9. The computer monitor is the evaluation of PAL video is not the probate means synonymous if other videos might look good on the computer.

In addition, of course, the difference in image processing. TV and SD video are interlaced, computer monitors have a progressive picture. This results in horizontal movement to the known "artifacts" s.senkrechten edges. That are visible when viewing on video monitors and TVs do not, if the picture is synonymous delivered via video connections.

This seems to be synonymous to the reason that s.allen professional editing suites are video Kontrollmollmonitre and we are niocht relies on the view on the computer monitor.

Despite the non-optimal viewing on the computer monitor should remain mE interlaced material in terms of future viewing on televisions synonymous interlaced.


Antwort von iMac27_edmedia:

DV has always been 720 times 576, then s.Screen synonymous when it is played with 768 times 576th
The resulting 480 only if one uses a 4:3 in 16:9 format, as previously often been the case instead of working anamorphic. Then, due to the bar at the top and bottom of only 480 lines visible.

Respectively, one can say that what is present on DV in 720 x 576 is in anamorphic output (eg in a file for MPEG4) written in a 1024 x 576-File (eg export or export via Compressor MPEG-Streamclip)



Antwort von macrooky:

So, thanks for the help. iMovie is the culprit. The same material in DV with FCE is correctly exported and much sharper than the iMovie video. Wanted to take a test now synonymous with progressive images but I get the material is not properly recognized in FCE. The first export it in 16:9 in addition, the black bars and accordingly the quality is bad because FCE does not recognize the format and treats it as DV 720x576. Tomorrow, I will sometimes import the footage directly in FCE ... Gruss Michi


Antwort von tommyb:

"IMac27_edmedia" wrote: The resulting 480 only if one uses a 4:3 in 16:9 format, as previously often been the case instead of working anamorphic. Then, due to the bar at the top and bottom of only 480 lines visible.

This not correct.

In general, a digital video image with SD Resolutionnach EU (or PAL) standard 720x576. When I record and this anamorphic anamorphic material then runterskaliere to Letterbox, then the material has a properly Resolutionvon 720x432 (because: 768: 16 x 9 = 432 - because yes is not a square 720x576 resolution).

But bars are added top and bottom so that one comes back to 720x576 and already we have a letterbox which is not on the 4:3 Television appears too wide.

The true monomer originating a 480 number comes from the land of opportunity, because there is DV (digital and everything synonymous with SD resolution) 720 x 480 pixels.

And why is that? No idea - but, perhaps because of:

PAL => 720 x 576 x 25 fps = 10.368 million pixels per second
NTSC => 720 x 480 x 29.97 fps = 10,357,632 pixels per second

Which means in plain language, that you can work in both standard with the same bit rate and miniDV tapes in both PAL and NTSC synonymous have the same maturity (eg Digibeta is simply not the case).

Now I digress, but ...

Quote: Respectively, one can say that what is present on DV in 720 x 576 is in anamorphic output (eg in a file for MPEG4) written in a 1024 x 576-File (eg export or export via Compressor MPEG-Streamclip)
Where 1024 was not entirely correct.

Actually, DV following "equalization factor" in the presentation:

4:3 => 720px x 767px = 1.0926
16:9 => 720px x 1.4568 = 1049px
(Source: Sony Vegas)

It is synonymous among others the reason why the mixing (in a DV-SD Project) of HDV (with square pixels) and DV (with non-square pixels) in the HDV material above and below has sooooo little black strips ( if the editing program interprets the aspect ratio correct).


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