Distorted Sound when adjusting video brightness

[linosh]

I just downloaded Ulead VideoStudio 11+ trial version. what is bugging me is that whenever i applied the color correction (brightness, gamma, contrast...) to my video and then play it, the sound becomes absolutely inaudible! It sounds like what you'd get when a tv is not receiving signals... or full blast of electric currents ZZZZZZZZZZZZZZZing! But when I reset the color correction back to 0, the sound works fine. What is absolutely wrong?! Anybody help?

[linosh]

I just tried reverse video and the 90 degrees functions, the sound problem is exactly the same as described in my above post!

[Black Lab]

I've had problems, once in a while, with clips not fading correctly (the audio) when some filters or transitions are applied. I could never figure out what caused it, but splitting the audio always fixed it. Worth a try.

[linosh]

Hi Jeff, thanks. I tried to split the audio but this time, there's no sound.

[Black Lab]

Are you playing it in Clip mode or Project mode?

[linosh]

In Clip Mode. But when I change to Project Mode, the distorted sound came on. Thereafter, whether in Clip Mode or Project Mode the distorted sound just wouldnt go away...

[Gisela Richter]

Not a direct answer I'm afraid, but the only filter I've used so far is the gamma filter because my Canon MVX camcorder tends to overexpose (why don't camcorders have the exposure correction stops that cameras have?). The filter invariably impairs the quality, so you have the choice of correction with slightly impaired quality or no correction with better quality. In short filters seem to be a double sided knife and better avoided if possible.
Gisela

In Clip Mode. But when I change to Project Mode, the distorted sound came on. Thereafter, whether in Clip Mode or Project Mode the distorted sound just wouldnt go away... :x

[Black Lab]

The filter invariably impairs the quality, so you have the choice of correction with slightly impaired quality or no correction with better quality. In short filters seem to be a double sided knife and better avoided if possible.

Well, that's basically what filters do; they change the quality of the clip - whether it's the color, clarity, focus, etc. Filters are very useful and I use them often.

why don't camcorders have the exposure correction stops that cameras have?

Most of the more expensive prosumer models do.

[Ken Berry]

(why don't camcorders have the exposure correction stops that cameras have?)

I would be surprised if, buried somewhere down in your camera's menu, there is not a control which can set the camera's white balance to Auto, or least give you a chance to control the white balance manually. Older video cameras used even to have a button on the case which allowed you to shift the white balance, but that seems to have disappeared into the menu in more recent models.

I don't have your camera, but I have the Canon MV430i and now also a Canon MV960i and both have auto white balance controls which work just fine.

[Gisela Richter]

"That's basically what filters do" What? Impair the quality? Well the gamma correction is not really a filter but a colour correction and apart from the welcome correction it causes a slight loss of quality.

The filter invariably impairs the quality, so you have the choice of correction with slightly impaired quality or no correction with better quality. In short filters seem to be a double sided knife and better avoided if possible.

Well, that's basically what filters do; they change the quality of the clip - whether it's the color, clarity, focus, etc. Filters are very useful and I use them often.

why don't camcorders have the exposure correction stops that cameras have?

Most of the more expensive prosumer models do.

[Gisela Richter]

Ken, here in Europe the Canon MVX series has the highest reputation in this (modest) price range. I paid only 500 euros for mine 3 years ago. The image quality is surprisingly good but it tends to overexpose so I sometimes resort to manual exposure like I used to with my old Leica just trying to judge with my eye the best middle value and shooting the whole clip with that. Sometimes the exposure is too dark, but often it is much better than automatic. But I don't think this has anything to do with white balance - or does it? I thought white balance was only for correct colour, not for over- or under-exposure problems. What I need is to be able to set the aperture just one stop smaller while retaining the automatic exposure. Jeff says the more expensive camcorders have this facility.

[Ken Berry]

Gisela -- I agree exposure and white balance are not exactly the same thing, but with video, if your white balance is off for any reason, your video will look either over- or under exposed. Believe me, I know this happens from my old analogue video camera days in South America, and trying later to correct it is a real trial.

But I have found that with my digital video cameras set to White Balance -- Auto, while there might be some sudden changes of exposure which cause the camera to over-or under expose for the first second or two (which normally can be cut out anyway), the following exposure is normally correct. And as I say, that is the case with my two Canon video cameras... And I do an awful lot of video work, including over the years in Europe (including most recently in February/March this year in Belgium, Netherlands and Portugal), where the light variation, believe me, is much easier than in, say Africa, Australia or Antarctica, where I have also been!