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Post by simonwells61 on Aug 2, 2011 13:47:19 GMT
I'm transferring some old VHS's to DVD- some which were copied over to me in a very primitive fashion. A few have excessive picture roll- which I can only presume came from copying down a few generations. Anyone here know if digital technology has engineered a system to level these rolls out?
Cheers in advance
Si
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Post by LanceM on Aug 2, 2011 17:31:05 GMT
Hello Simon, After looking about,was able to find something of interest for you here.There are two main programs here for VirtualDub and Video Enhancer.Looked as if may do the trick here for you.Both have 30day free trial use listed on the site here.Hoping this may be of some assistance in cleaning up your video-digital materials. www.infognition.com/VDFilterPack/Cheers,Lance. |
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Post by Ian Watlington on Aug 2, 2011 18:32:15 GMT
VirtualDub won't do anything to cure picture roll. If it's been burned into the recording, then the only way to try and fix it would be to use something like After Effects to manually reposition the image frame-by-frame. It will probably require a lot of masking as well to put parts of the picture back into the right place.
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Post by Peter Stirling on Aug 2, 2011 21:09:49 GMT
If the tapes havent been used for sometime then they might have sagged a bit?
Sometimes rewinding and fast forwarding a few times is all they need.
Other possibilities could that one machine or another was out of spec and therefore try another one and make sure the sync head is clean and not worn
That assumes they played alright in the first place
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Post by LanceM on Aug 3, 2011 3:42:42 GMT
That is a great suggestion there Peter.One of those "Why Didn't I think of that earlier" moments here for me.
As the ol' N1500 and later N1700 VCR tapes had (often times) plastic yellow tension-tape winders included.The same can be done here, using a small piece of coin.Should wedge solidly in the tape sprockets.A slight clockwise-manual wind until can feel the tension in the tape at its peak(careful not to over-wind here).This might assist somewhat in solving this dilemma.
An ex-video store owner friend of mine showed me this little trick many years ago now.Has worked wonders for slightly ribbed-damaged recordings.Yielding in far superior playback there.
Very true there Peter,assuming that they had a proper initial playback.Hoping you did not dispose of the tapes after the first transfer attempt here Simon?
Cheers,Lance.
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Post by Ken Griffin on Aug 3, 2011 8:34:56 GMT
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Post by Deleted on Aug 3, 2011 12:39:44 GMT
Yes, a timebase corrector job, I think. Some VHS / SVHS edit machines had one on them that you could switch on / off (I have one myself). This can often sort out unruly and random tape errors like this. No guarantee, mind, but it could well do the trick. Sometimes a cure for something like this can often be effected by a simple thing such as trying the tape in another machine, which i've done myself.
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Post by LanceM on Aug 3, 2011 17:06:41 GMT
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Post by Ian Watlington on Aug 3, 2011 18:01:16 GMT
Simon stated that the tapes with the roll problem were multi-generation dubs. That being the case, there is a strong chance that the roll is burned into the recording (as in, the source tape that was used to create Simon's dubs was exhibiting the rolling, so a rolling picture is what was recorded onto Simon's tape), and a timebase corrector or swapping to a different VCR will do nothing.
Simon, if you choose to buy anything to try and fix the problem, make sure you can return it for a full refund if it doesn't work. It could well be that you will need to attempt manual frame-by-frame repair, and even then it probably won't be very successful.
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Post by Peter Stirling on Aug 3, 2011 21:09:03 GMT
Thanks Lance
for the encouragement.
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Post by simonwells61 on Aug 3, 2011 23:34:24 GMT
Thanks everyone. The tape I am most desperate to restore is a home movie (VHS) of the Jam's last gig in Brighton- December 82. It is about 2 gen down, but suffers from interminable picture roll. You're right, it is burned into the tape -but if anyone fancies having a go- let me know. As always, thanks! Si x
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Post by Deleted on Aug 4, 2011 8:46:15 GMT
Ah, it's burned into the recording! Well, that changes things. The TBC solution won't work as what you have is a video recording of picture roll from another tape, rather than a tape which displays that fault itself. What happened to the original 1st gen tape? As it's a fairly vaulable recording (being The Jam's last gig), i'm surprised you didn't keep it. VHS used to plummet in quality with every generation copy so you really need to go as high up the chain as possible to make a restoration worthwhile.
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Post by Colin Anderton on Aug 4, 2011 8:56:02 GMT
Laurence, you beat me to it. Exactly, what you have is a recording of picture roll, so there's little that can be done.
Whenever I have a problem tape - the original tape, that is - I pass the recording through a little white box from GTH Electronics, called the "Ace". I don't think they're available any more, but my understanding is that this machine puts new synchronisation pulses to the tape before it goes through to my computer.
It is a wonderful bit of kit! Most picture roll is easily corrected; so glad I got one while they were available.
Just a theory, but they may have been withdrawn because it makes the job of copying copy-protected material easy.
Colin.
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Post by Ian Watlington on Aug 4, 2011 20:01:48 GMT
what you have is a recording of picture roll, so there's little that can be done As I pointed out in the third post of this thread  In the days before digital recording, your box was only one among many from numerous different manufacturers. There was always a wide range to choose from from something like the Keene Electronics catalogue. You can still buy them now, but of course a lot of manufacturers have pulled out of the market because it has shrunk so much since the general death of VHS as a recording format. Keene only sells a single video stabiliser box now, for £162. |
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RWels
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Post by RWels on Aug 5, 2011 11:12:51 GMT
For complicated matters I usually turn to videohelp.com, there might be a solution there already.
(Recently for example I found out there is a tool that will fill in logos and timecodes based on the surrounding pixels. This can make burnt-in stuff much less intrusive. (OT but a good example of solutions that are already there.))
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