> That is what I thought. When encoding a widescreen movie with aspect ratio > 16:9, black borders are not needed to expand the video frame, as is needed > when encoding to a 4:3 aspect ratio. The aspect ratio will be preserved. > Therefore all the bits in the encoded video are used in the original image > and are not wasted in the black borders. That is why I think the quality > should be better. Am I right?
If you only watch the movie on a 4:3 TV, then it is both a waste of bits and a reduction in quality to encode the widescreen (anamorphic) version. Most (all? certainly the cheap ones) DVD players convert 16:9 material to 4:3 material by dropping every 4th line, rather than by doing any quality interpolation. Far better to do the scaling yourself via y4mscaler before encoding. The resulting pure black bars will take up negligible space, and the non-black image has fewer lines (but they will all be shown). For widescreen TVs or software players you would keep higher image quality by not scaling. It's a tradeoff I never explored much since my DVD player doesn't do widescreen SVCD. Dan ------------------------------------------------------- The SF.Net email is sponsored by EclipseCon 2004 Premiere Conference on Open Tools Development and Integration See the breadth of Eclipse activity. February 3-5 in Anaheim, CA. http://www.eclipsecon.org/osdn _______________________________________________ Mjpeg-users mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/mjpeg-users
