problem with compression of JPGs in render

OCVQ wrote on 8/8/2008, 6:48 PM
I created a very simple slide show project using JPG photos set to music. I've done tons of these. I always render my photo and video projects to an AVI file, then bring the AVI files into my Pinnacle Studio software to author the DVD (I'm a creature of habit... I like Studio for authoring DVDs).

For the past several years I've been doing all my editing in Sony Screenblast Movie Studio with no problems at all. Yes, I recently purchased the updated Vegas Movie Studio but just haven't moved over to it yet. The two seem very similar and it's my understanding that what I bought is really the latest version of what I'm currently using. I went ahead and installed Vegas and did a small test to see if I ran into the same problem I'm about to describe, and I did. That's why I'm asking my question here in the Vegas forum.

My latest project uses photos taken with a different camera than I have used in the past, although a very high quality one. The photos are high res. and very nice, even when you zoom WAY in to look at the detail. I know the photos are good quality. In fact, they are actually larger JPG files than the other digital camera creates, which I have used successfully in the past. For some reason, the compression that takes place during rendering is really doing a number on these beautiful photos. They are all shots of children, many closeups, and it's terribly disappointing to see their smiling faces become distorted in the final AVI file. It's not awful, but I want clarity in a project like this. After lots of experimenting I figured out it's occuring in the compression process because I tried rendering using the "uncompressed template" and the resulting AVI file is beautiful. Unfortunately it's also about 6GB so I can't do anything with it. Too big for a DVD and when I tried to see what my DVD authoring software would do with it, it froze up.

Has anyone else ever experienced similar problems? Not sure why the rendering process would so distort one JPG but not another. I even tried downsizing all the photos BEFORE bringing them into the project. The new smaller JPGs look fine even on close examination. Still, the rendering process seems to want to compress further and that's when they start to look really crappy.

Any thoughts? Is the rendering process always going to further compress my pictures, even if I bring them in as very small previously downsampled JPGs? Any workarounds you can think of?

Comments

richard-amirault wrote on 8/8/2008, 7:26 PM
Will Pinnacle Studio ONLY accept AVI files for DVD?

If it will accept mpeg2 files try outputting to that type file instead.
OCVQ wrote on 8/14/2008, 7:04 PM
Thank you so much! That worked. I noticed that MPEG2 didn't seem to do as well with the video clip (a little aliasing?) but luckily I only had a short clip at the beginning of what was essentially a still photo slide show. The photos came out much better this way.

Thanks again!