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video colors all purpleish when shrinking
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tonyvr4
Newbie
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6. January 2006 @ 14:55 |
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I just downloaded and tried the latest dvd shrink 3.2.0.15 and tested copying Star Wars III DVD to my hard disk and there is a problem with the colors.
The 20'th Century Fox clip that is supposed to be yellow is purpleish, and the lucas arts clip which is green is all washed out.
Also the movie seems to play with correct colors for a bit then gets purpleish and then back to normal, and the cycle repeats every few seconds.
Any idea what is going on ?
Thanks
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AfterDawn Addict
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6. January 2006 @ 15:33 |
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Possibly a media/burn speed issue. What kind of media did you use for the burn and what burn speed?
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tonyvr4
Newbie
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6. January 2006 @ 16:07 |
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Sorry, I should have mentioned it before. I didn't use any media.
I did the output to my hard disk
Any ideas ?
Thanks
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AfterDawn Addict
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6. January 2006 @ 16:31 |
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Don't test the clips or trailers. Test only the main movie. How much compression were you using
Shrink is probably adding extra compression to the "less important" parts of the movie and you are seeing the results of this. If a large amount of compression is being used then the main movie could be affected as well.
Try testing like this:
Open Shrink then select Edit and then Preferences. Set the target size to DVD-9 and proceed with the test. This will use little if any compression and may correct the colors.
I'm assuming you looked at the original on your PC and it did not have color problems.
Note:
When using Shrink, always remove as much as possible. I almost always reauthor and burn only the main title. You want your compression number to be above 60%. Their are also quality settings that can be used to improve picture quality when a lot of compression is needed.
BTW the latest version of Shrink was also the last version. It's a couple of years old now so it does have a few limitations. Keep that in mind and if you have any problems you can always post here at AD.
Cheers,
Frank
Edit:
Oops, I forgot to tell you to set the size back to DVD-5 when you are done testing unless you are going to be burning DL media. I use this size, most everyone else likes a custom size of 4300 MB which is safer but requires more compression...
This message has been edited since posting. Last time this message was edited on 6. January 2006 @ 16:49
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tonyvr4
Newbie
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7. January 2006 @ 08:04 |
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I was testing the main movie. The problems did occur on the clips and stuff before, but it also did it in the movie itself.
I played the movie for a couple of minutes to see and it occurs all through the movie.
As far as compression, I didn't touch any setting in the program, so whatever is used as the default was set.
I never burned to a DVD I only output the movie to the hard disk and these color problems were on that file output.
Suggestions ?
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AfterDawn Addict
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7. January 2006 @ 08:22 |
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That is a big movie so you really need to do some extra work to get the compression levels reasonable. There is no default compression setting. Shrink will add the amount of compression needed to make the movie fit. If the movie is big then Shrink adds a ton of compression. It is up to you to reduce the needed compression to a reasonable level by removing extras.
I understand that you did not burn the movie. That does not matter. Do the tests I asked you to do in my first reply.
Try a smaller movie to test with as well. Shrink works fine for most people. You do need to know how to use the program to remove extras.
This message has been edited since posting. Last time this message was edited on 7. January 2006 @ 08:27
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tonyvr4
Newbie
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7. January 2006 @ 13:12 |
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Tried test as you mentioned. Set DVD Shrink to DVD-9 output.
Picture issues are gone, and movie seems to play just fine.
I guess it is a compression issue like you said.
But when I tried a program from the slysoft site, clonedvd2 and their AnyDVD, it copied the same disc onto a 4G dvd without issues of any kind.
Of course their programs a costly and DVD Shrink is free.
Any help is greatly appreciated. Thanks
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tonyvr4
Newbie
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7. January 2006 @ 17:18 |
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I tried another test with DVD Shrink and selected the main title only, and only audio 1, which is dolby 5.1
There were no problems at all. The quality showed as 70%.
Is this an average normal number for a movie of this kind ?
I couldn't unselect anything else to improve quality more.
When I burned the DVD with Nero, I saw a message about book type set to DVD, or something like that.
What is this and should I ever mess with it ?
Thanks
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AfterDawn Addict
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8. January 2006 @ 08:09 |
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70% is a reasonable number, in fact I use 70% as a guide to when I use Shrink's "Quality Enhancement" features.
Anything below 70% gets "Deep Analysis".
You can find the Quality Settings after you select Backup! on the Backup DVD menu. Using these will increase the amount of time to encode the movie.
Deep Analysis makes two passes instead of one. This lets Shrink figure out more accurately the compression required for the movie.
About booktype:
When you put a DVD in your player, one of the first things the player does is look at a few bytes of data that tells it what kind of a DVD it is supposed to read.
Your commercial DVD is a DVD-ROM.
Your burned DVD is a DVD-Video.
DVD-ROM is always played by your DVD player. It is the default setting of the player to play these. If it sees something else, then it will make adjustments to how it reads the disc.
Some players do this better than others.
If a player has trouble reading DVD-Video then you can tell the player to read your DVD as a DVD-ROM by setting the "Booktype" at the beginning of your DVD.
Checking the booktype box in your burning program causes a few extra bytes of data to be burned onto the DVD in the lead in area.
This only applies to DVD +R media because the +R media and a DVD-ROM have very similar read requirements. That's why booktyping a DVD-R disc is not done.
You do not need to check the booktype box unless your player is having problems with your DVD.
Only certain burners are capable of adding the booktype info. For example my Pioneer burner does not.
Why is it called Booktype...
Each DVD file format is described in an individual book. These are the books that manufacturers use to build players, burners, software and media. Because everything is built according to the books, everything works together. A DVD pressed in Taiwan will play in a player built in Korea, be read by a drive made in Japan and burned by a program made in Germany and so on.
DVD book specification side note:
When you see a disc capacity on your blank DVD as 4.7 GB and then you start reading the actual capacity it does not add up!
The DVD books recommend this:
Quote:
DVD Format Books specify the storage capacity by "Gbytes", not "GB." Since "Gbytes" and "GB" represent different values, DVD FLLC recommends that the Licensees use "Gbytes" as the unit on the packages of their products and on the related materials.
<Ref.>
1 Gbytes = 10exp9 bytes (1,000,000,000 bytes)
1 GB = 2exp30 bytes (1,073,741,824 bytes)
4.7 billion bytes capacity of 12 cm diameter DVD disc is equivalent to 4.7 Gbytes, not to 4.7 GB.
source: http://www.dvdfllc.co.jp/
The mfgs conveniently changed "Gbytes" to "GB" on their labels so it appears their discs hold more than they really do.
Frank
This message has been edited since posting. Last time this message was edited on 8. January 2006 @ 08:18
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tonyvr4
Newbie
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8. January 2006 @ 09:51 |
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That is good news and thanks for the education. That is actually facinating info by the way.
It seems that DVD Shrink works great. I found another program by elby called DVDClone2 that works pretty good as a standalone kind of thing.
I like DVD Shrink better as it seems to be much more flexable and has more options.
By the way, my dad's DVD Player is rather old and will only play the 8G dvd's. My unit will play the 4G Discs just fine, so that is way cool.
It seems that the 4G discs are all over the place and can easily be found at a reasonable cost. But the 8G discs are not available around here. Any suggestions to where I can find some to keep on hand for him until he get's a new player ?
Thanks
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Buik
Member
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8. January 2006 @ 10:49 |
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Video quality can be improved by not copying the beginning frames and also all the credits at the end. I like to get to the movie. I don't care which studio produced it and who had a hand in producing it.
When you go into re-author mode, edit out the un-needed material by clicking on the "Start/End" icon. I do this even if there will be no compression required. It shortens processing time and burning time. The further you can keep the burn away from the outer edge of the disc, the better.
TC
This message has been edited since posting. Last time this message was edited on 8. January 2006 @ 10:50
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tonyvr4
Newbie
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8. January 2006 @ 11:21 |
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Facinating idea. Thanks
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dwonda
Newbie
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10. March 2006 @ 12:05 |
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I know exactly what this guy is talking about with his purple problem. I seriously don't think it's because it's shrinking less important parts, it is way to consistent, and for some reason it gets reset everytime the camera changes in the movie. I hate to be such a pessimest but holy shit this has been frustrating, I have tried various different programs, one was TMPGEnc, which worked fine until i used IFO edit to author it, and a quarter way through the movie it would get an error message, something about not enough memory in the input buffer, so when it was finished everything was fine until it got to a quarter way through and the audio quit, it was AC3, and i extracted it with VirtualDubMod. The movie was originally 4 avi's, and i'm guessing when it comes to an error right where the second part of the movie is joined is no quoincidence. So ya, I said fuck Gladiator, i will just download it in DVD format, moved on to a beautiful mind and tried out avi2dvd, works great except for this purple haze crap. I decided to test it out on an AVI only 7.9mb large, and it did the same damn thing. Jesus, I just want to find a program that doesn't suck ass, any suggestions?
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