Hello Guys,
i have this noisy bar at the bottom of the footage. I think it is a very common problem because a lot of topic was created for that.
I read them so i need just a little assistance to correclty identify the problem and define the appropriate issue handling. Maybe getting information for better understanding
My workflow is:
JVC HR-S9600 -> TBC-1000 -> ATI AIW Capture Card -> MMC 8.1
I am using the VCR with the suggested features turned on. I have two of them so i left one of them untouched because with some cassettes it works fine.
One of the suggestions in these topic were the physical adjustment of the roller.
VHS_m-loading.jpg
Its the
1 Take-Up Adjustable Guide Roller. I marked with
2 the other roller. I didn't touch it because i don't know what is the function of that (maybe adjusting the top of the screen, but that just a rumor) and it has also this tiny wheel on the top of that with screwdriver holes. It starts to spinning when i hit the play button to avoid adjusting it during playback i think.
So i started to adjust the
1 roller with tiny rotations and check the result with capturing. I could eliminate picture jumpings (my grandmother with bad eyesight also notified the jumpy pictures) and could make the bottom noisy bar as thin as possible. If i tried to rotate on full rotation from this position to both direction the bar get thicker and the jumpy picture also came back.
This is the best result i can get from this side, maybe i should try out different feature settings? Maybe set the Picture Control other than SOFT or SHARP as hodgey mentioned
As you have a JVC machine, check the "Picture Control" setting in the menu, if it's set to SOFT or SHARP settings there image will be overly blurred.
For the technical background i read two terms to identify this issue: "head switching noise" and "overscan issue". I don't understand the relation of these two, LordSmurf mentioned
Again, I think you may be merging some concepts here. The "overscan" is a physical area outside the boundaries of the normal viewing area. One reason this area is exists is because it can (and usually does) contain various types of noise -- visual artifacts from closed caption pulses, head switching noise, broadcast pillars, etc.
The noise you have here is "head switching noise", which is a technical term for VCRs.
I am thinking about something like that:
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We talked about line and frame TBC earlier. It has any connection with this overscan area around the visible area or these are totally different contexts? What i thought eariler with the roller i can adjust the boundaries or if those are fixed for the image, an another rectangle for pointing at the visible area. Because of this wrong adjustment i see black bar at the bottom in the visible area from the overscan area.
From the software side until now i used MMC 8.1 only with mostly default settings. I found
VirtualDub more complicated. But as i see i have to use it because the common method to solve this problem is to mask this bottom area with black color to keep the aspect ration, resolution and others. In MMC i neither set codecs, left them on default, but with
HuffYUV and AAC codecs in
VirtualDub i can get better quality with bigger file size?
I was confused with that many VirtualDub version but i think the best i can get is this
version that was linked many times. No newer or later version.
I was also confused about these "filters" because i didn't know what are these exactly. One of them is this Masking method to remove the bottom bar, so can i say these filters are options to improve quality those MMC doesn't provide?
Finally here is a picture from the captured video, with a tiny noise bar at the bottom
Overscan.png
With the masking i will lose some picture data (at the bottom or at the top)? I don't understand why the noise bar doesn't appeare when on PC's display just playing or capturing the cassette, but visible on the captured footage.
Many many thanks my dear friends for the answers.