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  1. Member
    Join Date
    Dec 2015
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    vancouver
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    So, upfront, I am aware this could probably be posted in a more specific forum thread like capture/conversion etc.... Despite the fact this is my first post, I am only a rookie when it comes to source capture. I have been frequenting videohelp and it's forums for over 15 years. So i'm very comfortable with most of the topics and concepts. However, this is the first time I'm actually attempting to capture the source myself. I've only ever worked with content that was previously captured due to lack of faith in my rig to be able to handle the task, lack of necessary hardware, and mostly....I've never really had a good reason until now.
    Although i'm sure I will have many other requests for opinions and assistance, right now, I have a simple need for someone to ID what to call a "problem" I noticed in the resulting capture of a VHS. This is going to make me seem like a newb to most, but for the sheer amount of filters and enhancements available (especially in things like virtualdub), I want to make sure I am not applying something that is completely unrelated and unnecessary.
    The capture was from a very old VHS tape using a Toshiba M754 VCR. No S-video connection, so output is using the standard composite cables (red/white/yellow) to a DAZZLE video capture USB unit. I'm not using the included software, but upgraded to the Pinnacle studio ultimate software. This capture was done using the DV format @ 720x480 (highest settings available). Fresh boot on the pc and as many services and background tasks shut off to avoid interference. I am aware that with VHS source, the biggest impact is in the hardware for playback and signal quality. I don't have the luxury of tracking down a high end vcr or spending more for a different one.

    So here it is... After capture using Pinnacle Studio Ultimate, when I preview the captured file, I notice what I would describe as a repeating but temporary "tearing" or "skewing" of the picture at the top of the frame. It seems to happen approximately every 4-6 seconds, only at the top of the frame and lasts usually only around 1 second. Then back to normal for a few seconds, then rinse/repeat. Please see attached screenshot and let me know what to call this issue and if anyone has any suggestions on a filter or process to try, please don't be shy. One last thing, I could be wrong, but I am pretty sure this was not visible during the playback of the VHS during the capture on screen.Click image for larger version

Name:	vhssample.PNG
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ID:	35052
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  2. Member
    Join Date
    Feb 2008
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    United States
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    There is not much you can do except try using a higher end VCR with a Time Base Corrector. It is not a software problem and there is no software filter or software setting that can fix that.

    Google VHS Time Base Corrector to find out more information.
    Last edited by Vidd; 30th Dec 2015 at 20:59.
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  3. Member
    Join Date
    Dec 2015
    Location
    vancouver
    Search Comp PM
    Thanks for the reply. I'm aware of the limitations of post processing software fixes with video and VHS. IE: I know "garbage in/garbage out" and that filters and "enhancements" post capture can only do so much and often make it worse. I understand that ultimately with VHS capture, TBC and source signal/hardware is where the greatest enhancement lies. What the original post was asking in short: what is the issue seen in the screenshot at the top of the frame "called"? What can I "call" that issue when referencing it to someone? Because "smudged color skewing" doesn't quite sound like a good description. I'm trying to simply figure out what that issue is. I know there is likely no software or filter that will fix everything. My only issue with this problem is that I was not seeing it at all as the video played during the capture. The preview of the live video playback during capture was NOT showing this skewed picture at the top of the frame whatsoever. I only saw it after watching the captured video file. If it wasn't occurring during playback (although it certainly looks like a typical VHS tape issue), why would it suddenly show up in the captured output? Especially if it is NOT a software issue as you mentioned.

    So again, short version: What is the issue pictured in the screenshot at the top of the frame "called"? What is the video jargon for that issue? See below screenshot again.Click image for larger version

Name:	vhssample.PNG
Views:	166
Size:	865.9 KB
ID:	35054
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