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I’m puzzled-Why the visible difference in DV quality?
I have an asset, a Quicktime .MOV video file, 30fps, 1.0PAR, 320 X 240 pixels. No fields. This is my test clip.
1. In 1.5.1, I create a new STANDARD DV project(from the preset), and import the clip. On timeline, clip shows red, CTI movement is sporadic, requires rendering. I skip rendering (irrelevant) and export a MOVIE, standard DV preset, to produce a standard NTSC DV.AVI. I now have a full screen DV compliant version of this clip. (29.97, lower fields, 720×480, .9, etc.)
2. In 1.5.1, I create a CUSTOM preset, Video for Windows, 30fps, 1.0PAR, 320×240 frame size, no fields(progressive). I import the same test clip. On timeline, no green/red bar, no CTI sluggishness, no need to render. I export, a MOVIE, using the same DV spec (29.97, lower field interlace, .9PAR, etc.) I now have a second full screen, DV compliant version of this clip.
3. I open a new, STANDARD DV project, and import both clips. Properties show the clips to be identical DV.AVI clips, 720×480, 29.97, .9 PAR, lower fields, etc. Same number of frames. For both clips, ALL values displayed in the properties window are identical. Since they are DV, neither clip needs rendering. They both play fine.
The second clip appears slightly (very slightly) larger in the monitor window, but SIGNIFICANTLY sharper, clearer, in focus. The first clip appears fuzzy, slightly blurred.
Would someone please explain why this might be?
Keep Smiling
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2 Replies
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I guess the exporter will scale a bit better than the importer it would seem from your test.
TimK,
Kolb Productions,
Creative Cow Host,
Author/Trainer
http://www.focalpress.com
http://www.classondemand.net -
Thank you, Tim, for your response. I’ve since changed my approach for these files. It does require more steps than before: I now start a project in the smaller resolution, import the smaller files, and immediately export them to full-size, standard DV-AVI. I then import these files in to my standard projects. The difference in clarity is significant enough as to have me revisit a few archived projects to replace the fuzzier clips. The upside is that I no longer need to render the clips in the project.
Thanks again for the theorizing.
Drink Water, oh, and,
Keep Smiling
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