Retrace hash with DVD player? - Videokarma.org TV - Video

ctc17 · #1 08-01-2009, 01:16 PM

Im trying to figure out how to be able to use my dvd player with my old Zenith sets. With most purchased dvds I get retrace lines in the upper left side of the picture.

As I understand it this is due to copyright protection info that is in the retrace. I have tried different vcrs and rf modulators to convert the video to ch3. On some the contrast fades in and out as well as the lines.

It does it the worst on the zeniths. One of my rcas not at all and one a little.

Has anyone found a way to convert dvds to ch3 without the lines?

N9ZQA · #2 08-01-2009, 02:17 PM

The retrace lines are due to the Macrovision protection on the DVD (this also causes the brightness variations). Macrovision inserts extra pulses into the vertical blanking interval which our older sets simply weren't designed to handle. The simplest way to get rid of them is to get a DVD player which supports Macrovision on/off. They are usually the $20-$30 specials. I've got a Daewoo DVDS151 that works well for this purpose, through a modulator to Ch. 3.

It should be possible to duplicate the DVDs on your computer without Macrovision protection, but then you have two sets of plastic sitting around.

-Jim

*zenithfan1* · #3 08-01-2009, 03:36 PM

I've heard that the original Xbox will play the DVDs without the Macrovision.

ihmeyers · #4 08-01-2009, 08:55 PM

I posted about this problem about 9 months ago.

I simply purchased an ILO DVD player on e-bay for about $30. It had after-market software that allowed me to turn off Macrovision. No problems now on my '66 Admiral...

jeyurkon · #5 08-01-2009, 09:38 PM

If you search the threads, you'll find info about the Universal Video Boards (UVB). I've ordered three. I plan to use them with the modulators I picked up on ebay.

John

Jeffhs · #6 08-01-2009, 09:59 PM

Macrovision is used on DVDs to prevent illegal copying. (The DMCA, the Digital Millennium Copyright Act, which was enacted in 2000, means business, and yes, people have been arrested, fined and sent to prison for illicitly copying music CDs, downloading MP3 files, and let us not forget the illegal copying of DVDs.) Therefore, I think it would be unethical at best and illegal at worst to defeat the protection. If you want to own a movie you are renting from Netflix (for example), go out and buy the DVD--don't copy the Netflix disc. I tried the latter once with a DVD of a favorite old TV series (Quincy, M.E.) by copying several episodes to my hard drive, but my conscience bothered me for some time afterward, so I finally ordered the box set of the show's first-second and later third seasons from Amazon.com and erased the copies on the computer when the discs arrived.

I felt a lot better once the purchased discs came in my mail. While I don't think I would have been arrested for copying the Netflix disc into my computer for my own use, I realize there are laws against such copying (that FBI anti-piracy warning at the beginning of most commercial DVDs is all but impossible to ignore and, like the DMCA, means business), so I decided to play it safe and buy my own copies. Another nice thing about having the actual DVDs is that I can watch them on my TV, rather than having to be tethered to the computer.

As to the Macrovision protection being defeatable on some DVD players: if it is, I don't know how to do it with my own player and wouldn't do it even if I did know the procedure to do so. My first DVD player was a cheap CyberHome DVD-300S that did not, to the best of my knowledge, have any kind of provision for disabling Macrovision; my present player, a Memorex DVD-2042 full-size unit, does not seem to have any menu options to do this either, and I've studied the setup menus fairly carefully. I'll look at those menus again, but I'm fairly certain there is no easy way to defeat the copy protection unless one were willing to replace pre-progammed ICs in the player--I think most of the player's functions are on one large multipin IC, not unlike the huge "jungle" IC in today's televisions. There is a switch on the back of my player that turns on or off the progressive-scan mode, but I'm fairly sure as well that has nothing to do with Macrovision.

*zenithfan1* · #7 08-01-2009, 10:09 PM

I think you WOULD disable it if you were watching a roundie. It is very distracting and annoying, I wouldn't copy the discs but I would be happy that the lines are GONE. I plan to get an old Xbox or mod that crappy player for my home transmitter set up on one of the VHF channels.

andy · #8 08-01-2009, 11:30 PM

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jpdylon · #9 08-01-2009, 11:53 PM

I use one of those video stabilizers i bought from clearpix media awhile back. Seems to do the job just fine.

ChrisW6ATV · #10 08-02-2009, 12:28 AM

Here is the site with a database of DVD player hacks. You can look up any brand and see if a hack is available for it. I wanted the same thing, to be able to watch my DVDs of old TV shows on my early sets.

http://www.videohelp.com/dvdhacks

If this post is against the rules, moderators please remove it.

ctc17 · #11 08-02-2009, 06:58 AM

Quote:

Originally Posted by jpdylon

I use one of those video stabilizers i bought from clearpix media awhile back. Seems to do the job just fine.

This helps with the dvd player to tv problem? It says its for video tape to dvd. Maybe its the same protection.

I did search all over for posts on this. Im sure every description would be a little different and I didnt match the words used.

Thanks everyone for the help.

jpdylon · #12 08-02-2009, 10:47 AM

Its designed to filter out the macrovision - which is what causes the retrace lines to appear in the older sets. newer sets do not scan the first few lines which is where the blanking information for the macrovision is.

Also as mentioned some DVD players have software that allows you to turn off the macrovision.

Another solution is to download DVD shrink, and make a copy of the movie you're trying to watch. A little more time consuming but also works.

jeyurkon · #13 08-02-2009, 12:22 PM

Quote:

Originally Posted by Jeffhs

Macrovision is used on DVDs to prevent illegal copying. (The DMCA, the Digital Millennium Copyright Act, which was enacted in 2000, means business, and yes, people have been arrested, fined and sent to prison for illicitly copying music CDs, downloading MP3 files, and let us not forget the illegal copying of DVDs.) Therefore, I think it would be unethical at best and illegal at worst to defeat the protection. If you want to own a...

This was pretty well hashed out in earlier threads. No one was talking about copying in this one unless I missed it. There's nothing illegal or unethical with defeating Macrovision if you're just trying to watch it on an old set. There's no copyright infringement. It becomes illegal when you start making copies.

John

ctc17 · #14 08-06-2009, 07:31 PM

Quote:

Originally Posted by jpdylon

I use one of those video stabilizers i bought from clearpix media awhile back. Seems to do the job just fine.

I got the video stabilizer today and WOW! it cleans it right up. Thanks for the tip

ihmeyers · #15 08-08-2009, 08:52 PM

Quote:

Originally Posted by Jeffhs

I think it would be unethical at best and illegal at worst to defeat the protection.

I bought this DVD player because legitimate DVDs I bought on Amazon wouldn't play without the hash on my Admiral. I'd say at least 50% of them (including my beloved Honeymooners and Kolchak) were affected.