Which Aspect Ratio

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I am trying to encode a dvd I ripped to vcd and I used smartripper and DVD2AVI. My next step is to encode using TMPGEnc. I loaded to correct template and from tutorials I have read it says under Settings, Advanced, Source Aspect Ratio to use whatever DVD2AVI said which was NTSC 16:9 but TMPGEnc defaulted to 4:3 525 line (NTSC, 704x480) so I choose 16:9 525 line (NTSC) and encoded a small clip. Then I encoded a small clip using what TMPGEnc defaulted to and they pretty much looked the same. Which setting do I use the default or whatever DVD2AVI said?


-- Scott Windmiller (swindmiller@hotmail.com), January 04, 2002


VCD only allows for two valid resolutions - 352x240 NTSC and something like 352x288 for PAL. Your resolution is not valid, although some DVD players will play it without complaining. Just understand that this strange resolution may cause problems on other DVD players. I don't use TMPGenc much, so I'm not real up on the Source Aspect Ratio. I think TMPGenc usually encodes it out as 4:3 anyway.

-- Jason (Jason.Shumate@equant.com), January 04, 2002.

They pretty much look the same because they are the same. TMPGenc has a specific 704x480 source template because since VCD is exactly a fourth of that (352x240) some shortcuts can be made in the encoding algorithm to speed up the encoding without decreasing quality. But if it detects you gave it 720x480 anyway then the 704x480 setting is irrelevant, whether or not u choose it. On older versions of TMPGenc the difference of 16 pixels in the two gives a slightly horiz stretched-looking output MPEG-1 but on small wretched TVs this is not noticeable. U know DVD is 720x480 so don't use 704x480.

-- Mehmet Tekdemir (turk690@yahoo.com), January 05, 2002.

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