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video limiter-how to use?
Hi,
I trying to figure out how to use the video limiter plug…
I have to prepare a short animation film to be screened in a relatively bad video projector (beta SP)
All the articles and help in the software didnt really help…
Are the default parameters good enough? or to be really strict there is another config?
In resume, how does it work?
(is it similar to a vectorscope?)
thanks ahead,
Ricardo -
7 Replies
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I am not sure what you are trying to accomplish. Could you be a little more specific?
Aanarav Sareen
premiere@asvideoproductions.com
https://www.asvideoproductions.com/techtalk -
Although I haven’t really used the video limitter that comes with Premiere, I am guessing it does what all limitters do and helps you keep the brightess / luma in your footage within broadcast specs. (Saturation too ?)
This is mostly aimed a TV screens and not projectors. There isn’t much that you can do to increase the brightess and contrast ratio of a projector at the editing stage. You can however use the waveform monitor and make sure that your levels fall between 7.5 and 100 IRE’s, using the manual level effect. The problem with using automatic filters like a limitter, or auto level is that you may get noticable sudden shifts in your footage over time.
Vince
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Hi thanks for replying,
I dont have to increase luma, probalbly to decrease it…. the problem i have is that yin some projectors my whites are completely burned… in others, just fine. I wante do do some limiting so i can make sure im in the right values, and not leave this to the quality of the projector.
Is there a waveform monitor in premiere? i dont know it…maybe a plugin?
Thanks so much for your help.
Ricardo -
There is a waveform monitor in Premiere “Pro”. If you have anything above 6.5, click on the top right arrow in your preview monitor and change the mode to YC waveform. I would then apply the levels effects, use the RGB white output setting to lower the luma.
But what is likely happening is that the projector owner(s) have cranked up the brightness / contrast, to get some more bang out of them.Lately, I’ ve even seen factory default on newer projector making color bars look like something you would see after one of those 60’s party 😉
Vince
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thanks a lot, Vincent
Ricardo -
Vince,
I read that PAL is good fron 1- 100 IREs, but the scale for pal in the waveform is completely different….Do you know the right amount?
i have been looking to a decent tutorial in the web…not much luck any ideas?
(I damn living in a PAL country!)
thanks,
Ricardo -
Indeed Pal black is 0. Check out Tektronix.com. They have some of the most in depth documentation on video monitoring. Here’s a link that should get you pretty far ahead. https://www.tek.com/Measurement/App_Notes/25_7075/eng/25W_7075_3.pdf
Vince
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