Frage von nomonoton:
A colleague of me has claimed that
HDV has problems with punches at Blue / Green Screen. It should s.der higher compression and are located in rows fray ". I can not quite explain it to me, unfortunately, has made one experience? I intend in the near future umzusatteln least partly due to
HDV, but in any case to make in May, a production on
HDV for which I certainly need some blue screen settings ... I will of course be better to know beforehand whether I am there with another system would be better advised.
Antwort von Basti:
I can not imagine really that it should come in HDV at blue screen productions to larger kompliaktionen.
if you (as usual synonymous) the vodergrund sharp, and the blue screen very blurred fokusierst should really be no pigment errors.
I (synonymous with an HDV camcorder and I had no complications - as already indicated, background must of course be very blurred, so that your program cut the keyfarbe synonymous and can be clearly seen punching)
Antwort von nomonoton:
hello basti ... sure ... so that the background is both clean and shone as homogeneous as possible, of course, should have beschaffenheit preposition. However, it is synonymous with the digi-beta or mini-dv. nonetheless-the message of my colleagues had of him after a supervised production: hdv makes COMPARED to other formats and DAS problems I can not explain.
Antwort von Basti:
funny .... well, as I said I had no problems with it is to me to be honest synonymous again.
more I can not say this now, unfortunately, synonymous. You can now even the internet for a few more clever film making smart university sites to address the even more sowas I think.
Antwort von wolfgang:
On Hackermovies was reported some time ago about such problems - sometimes google it. Is not s.dem gegeüber DV-avi verändderten Farbsampling of 4:2:0.
Antwort von PowerMac:
Yes clearly HDV makes big problems.
Chroma keying is only good with good resolutions in both Cr, Br as synonymous with luminance.
The compression of HDV but is shit. Thus, the color resolution synonymous.
Not every pixel has its color. Rather, each block has a relative color information. If, in a block of green synonymous with green screen is going to come, you have zero chance. Fringes, fringing.
Antwort von nomonoton:
@ powermac:
what is the conclusion from this? for keying then I'll take it back and convert the calculated digibeta hdv material in order to remain in the same standard "? cries out for additional work fine ... and free ...
Of hdv seems the last word on budgetmässig for smaller productions overcharged synonymous nor what his next removed, as I previously thought, a shame ... ...
Antwort von PowerMac:
HDV is for me personally, not as a HD version of the question. The typifies quality per pixel is simply too bad. Even when the DV is better.
If you HDV down converted to PAL, it is good.
Only when the green screen is a little different. Once a green border is in it, is synonymous with the Runterrechnen not go outside.
The solution is not safe to take back to Digibeta and count up to. But HDCAM. This represents virtually Digibeta to HD.
Antwort von wolfgang:
Yes, just let us be realistic: how many users really need the HDV, the keying features? Who uses it? In my view, a relatively small, more professional minority.
And this minority should probably actually watch the more professional format - for example in the form of straight ahead DVC PRO HD format (Panasonic 200).
The problems with keying DV-avi gabs in poor color combinations ever, because with 4:2:0 DV-avi is not better or worse than HDV 1080 50i. Same Farbsampling, and the two interlaced. Something better might be more of JVC 720 25p - then you have obtained at least a progressive picture, and defacto significantly higher data rates on the number of pixels - but with an unchanged Farbsampling.
Ist halt as in the Introduction of DV-avi: synonymous at that time was of the professional world, said that a consumer format. Until the camcorder have come, have certainly allowed certain professional activities.
Conclusion: we must halt know what you want and what you need - and what it will cost. Has never been otherwise, will never be otherwise.
:)
Antwort von PowerMac:
The problems with keying DV-avi gabs in poor color combinations ever, because with 4:2:0 DV-avi is not better or worse than HDV 1080 50i. That's not true. HDV and DV-PAL has nominally 4:2:0, but the bit rate is simply not enough. Even if the Chromaauflösung remained Resolutionprozentual equal to the total (4:2:0), the Chromaauflösung but is relatively much worse. Due to the much higher compression. That is, when you compared a truck (Mpeg2, facing many data (HD), a relatively effective, worse on motion codec) and an Audi (I-frame codec, few data (PAL) device, never out of step) with each 300 HP! But who is faster? (I hate limping car comparisons.)
At the latest when it is easy swings in front of the green screen we have real problems. But even in static images is absolutely pure green with.
Antwort von PowerMac:
Effectiveness of the compressor x (bitrate / traffic) x (Chromaauflösung / Resolution)
This product explains why HDV is unfavorable in keying.
Although we have 4:2:0 for HDV, but the bit rate / traffic is bad.
