Infoseite // Video abruptly changing brightness and color while titles and Apertures



Frage von Markus:


Hi,

I'm just technically Statement on the tube: A client had me sent MiniDV recordings, which I s.einer certain point with a subtitle should provide. He himself would have skillfully Although synonymous, but he said s.jenem point where the subtitles appear, would be the whole picture to an abrupt Farb-/Helligkeitswechsel (all a bit brighter, the sky more blue instead of cyan).

I know it still jumps out of my Casablanca-time. There were some scenes that were critical of the title, or crossfading. It was possibly due to such effects. - Immediately I had the old video card of my clients are suspected (AV Master: Only analog and purely out, even with DV camcorder), probably similar to my old Casablanca digitized / compressed.

After completion of the work now, I received a phone call and the customer said that the scene that I had called him, would now be just as bright and color changed as if he himself would have been entitled. Only that now affects the entire scene and not just the field displaying the title. (The other scenes are also handled not been criticized, so to fit the respective originals same MiniDV tape. For MiniDV recordings are actually third-digital-VHS video).

When I play the recordings via firewire 1:1 inside and out and used the Matrox DV codec is set up so that he neither black nor white in the area wegclippt anything. On the video monitor, I see no difference in the brightness and color of the original scene of the DV tape in Comparison to the scene titled. (Even if it is played on MiniDV and test will be performed again).

However, I see the images on the MiniDV tape of customers already in the original with the cyan sky, so just as the customer just did not want it to.

Currently I am a bit on the hose and would have a thought. Has anyone made similar experiences and perhaps even an explanation for this phenomenon? How can we avoid such a thing?

Space


Antwort von hannes:

in earlier times, we had the problem synonymous.
They were of different color spaces.
(16 .. 235, 0 ... 255)
After consistently with the full color is used
(and the synonymous codecs dominate this)
there is this problem really is not anymore.

Could a trace be?

Bon dia
hannes

Space


Antwort von Marco:

Are you absolutely sure that the Matrox DV codec has been configured properly (for some codecs in my opinion, the attitude just the opposite of logic to be)?

Are you absolutely sure that the Matrox DV codec when you encode De synonymous to apply and not only to encode?

The described Pänomen is in fact typical of a Luminanzspreizung as some DV codecs for decoding settings. This would be synonymous to speak, that you have the shots in these original amendment, provided that you have with "original" condition after capturing mean.

Can you give me a short time, perhaps via e-mail contact?

zum Bild

Gruß Marco

Space


Antwort von Markus:

Thank you both for the tips and hints. : D Since I have only to try anything once ...

Space





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