Image quality

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AndyD810

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Andy
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can anyone help me with this problem, when I transfer my images to DVD (yes some people do still request images on a DVD) the quality of the image is very poor yet the image quality is very good on Mac, PC or in print?
 
By poor image quality I mean the image isn't sharp, the colours are off, oversaturated, just poor really, as far as I'm aware they aren't compressed.
 
As said, how are you converting, if just drag and drop then there should be no drop in quality, if using some form of slide presentation software then its probably drastically dropping the image size, there might be a setting for that in the software you use.
 
What's the resolution of your images on the Mac?

A PAL DVD is about 0.4 megapixels.
 
As mentioned above, Standard Definition video is quite small pixel-wise: 640x480

Colours off and oversaturated = most people's TV's if you view a photo on them. Usually poorly set up.
 
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st599 said:
What's the resolution of your images on the Mac?

A PAL DVD is about 0.4 megapixels.
Click to expand...


^This.. a PAL DVD is 720x576 pixels.

Are you creating an actual DVD that will "play" in a domestic DVD player? If so, that's your problem right there. Nothing you can do either as that's the resolution of the SD PAL DVD format.

You'd have to burn them onto the DVD as a data disc, so you're basically just putting JPEGs on a disc. You can choose whatever resolution you want then... until the disc is full
 
It's when I have been creating a slideshow that the quality drops, what software should I use so that the quality is good, I have seen wedding slideshows where the quality is excellent,
 
AndyD810 said:
It's when I have been creating a slideshow that the quality drops, what software should I use so that the quality is good, I have seen wedding slideshows where the quality is excellent,
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Can you please let us know if you are creating a DVD that wil play on a domestic DVD player as a DVD?

If so... it will be 720 x 576 pixels in size. There is nothing you can do about that, as it's the resolution of standard definition TV.

What may be making it worse, is are you sizing your images before creating the slideshow? If not, and I'm assuming you use a D810, you're not just using the original 36mp files are you? They will need a LOT of compression and sizing by the software. Size the images first in Photoshop.. carefully by selecting Bicubic Sharper (Reduction) and lower the image size first. That may help.

Standard definition DVDs viewed on a decent hi resolution screen do look a bit crap though.
 
Yes I am trying to create a DVD to play on a domestic DVD player, no I am not sizing my images, do I need to make my images lower res then before creating my DVD ?
 
AndyD810 said:
Yes I am trying to create a DVD to play on a domestic DVD player, no I am not sizing my images, do I need to make my images lower res then before creating my DVD ?
Click to expand...
A number of factors come into play and your software should be able to handle that. More images means more space, in order to fit more on a DVD the bit rate has to be lowered. High it rate DVDs or as they used to be called superbit, can have very good image quality.

So the amount of images versus the duration of the slideshow and the bit rate you set it at, it will all impact the quality of the output. And not least also the tools you use to author, every compress/recompress affects it further. Try and limit it to just one in the right format.
 
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