Quantcast What causes lines through video? - digitalFAQ Forum
  #1  
04-07-2020, 04:54 PM
evilt1000 evilt1000 is offline
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I having been capturing VHS for a while now and this problem just crept up within the last few days. All my tapes now have a line though the video about 1/4 of the way up from the bottom when I play capture them. Some are more obvious than others so I attached 2 of the most obvious. I am using a JVC SR-V10U, TBC-1000, ES-10 and a Windows 7 PC. All connections are S-video. I have swapped out cables and removed components in the chain in hopes of isolating it but it seems to be originating from the VCR. This happens when I use Virtualdub and CMC. Am I looking at dirty heads? Damaged internals? Thanks.


Attached Files
File Type: mkv mmb1_line.mkv (1.63 MB, 13 downloads)
File Type: mkv planb_line.mkv (2.21 MB, 9 downloads)
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  #2  
04-08-2020, 03:32 PM
themaster1 themaster1 is offline
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I used to have that kind of horizontal bar (more in the middle of the screen) for home recorded tape; when i switched my vcr for a true american nstc model to play my ntsc tapes, i didn't have that problem anymore. Food for thought
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04-08-2020, 07:13 PM
evilt1000 evilt1000 is offline
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Thanks for the response but these were all NTSC tapes and VCR and I've watched them multiple times on this deck before this problem appeared. I'm starting to think that one of the other tapes I was checking managed to crud up the VCR and when I went to use these tapes the dirty heads, etc damaged the tape. I've cleaned the heads and the deck no longer shows this line on new tapes but the 5 tapes I played while the deck was dirty still show the line. C'est la vie.
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04-10-2020, 04:31 AM
msgohan msgohan is offline
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Quote:
Originally Posted by evilt1000 View Post
Thanks for the response but these were all NTSC tapes and VCR and I've watched them multiple times on this deck before this problem appeared. I'm starting to think that one of the other tapes I was checking managed to crud up the VCR and when I went to use these tapes the dirty heads, etc damaged the tape. I've cleaned the heads and the deck no longer shows this line on new tapes but the 5 tapes I played while the deck was dirty still show the line. C'est la vie.
I was going to say that you should immediately stop playing any tapes you care about in this VCR. I'm sorry I was too late.

For what it's worth, I tried researching this a bit the other day, after your first post, but couldn't find an answer. One point that someone made regarding errors like this:
  • The tracks are recorded diagonally. Given that the error presents in the same position in every frame, that means the error must follow the diagonal path of the track. I guess that lines up with the theory of "crud" being specifically accumulated on the head drum and physically damaging the tape during playback. (Useful diagrams.)
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  #5  
04-10-2020, 06:36 AM
evilt1000 evilt1000 is offline
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Thanks for the response. Any chance the tapes themselves can be "fixed" or the line removed after capturing?
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