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What is 374 vs 576? I guess 374 is a resolution measure and 576 is scan lines. How are you comparing these? As i said, 576 is the full resolution frame height. If you have less, you have less possible resoultion.
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I meant the lines you can finally differ on a tv. IIRC, the Kell also affects the height, regardless how many lines had been sampled!
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I'm not sure what you use...
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I'm using a Terratec Cinergy 400, Philips SAA7134. I'm not exactly sure how much it samples really. Didn't find any tests so far and had no time to create a test DVD.
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So when you say 520, you are simply resizing (resampling) down to that size. You can do that in post or as you capture. Depends on what does a better job. Cards sample higher than the bandwidth for many practical reasons like; line sync and ADC aliasing filtering to name 2.
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OK, then I made a mistake. I thought the pels you select are the number of samples the card uses. Now I understood that the card samples at a fixed rate and the driver resizes the picture afterwards.
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As far as SVCD and CVD frame sizes, BCast PAL can contain more detail than those formats hold.
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Of course, because the res./sample frequency is higher and there are obviously no compression artifacts.
I think I am through with that topic now...
Next I'll have to work on the proper res. and PAR/DAR calculation for the card. Maybe I'll post a howto for the Terratec in this form when I'm done with it.
edit: Just deleted a few empty lines I didn't recognize...