On Tue, 26 Sep 2000 brian@xxxxxxxxxxxxxxxx wrote: > I'm thinking of encoding some video at 3.7mbs. (224 kbs of it will be > for audio). > > In the experience of people on the list, > which delivers better perceived quality given that rate? > > 640x480 or 320x240 What kind of encoding are you planning on using? If you are planning on mjpeg, you had better go for 320x240, because 3.5 megabits/sec for 640x480 mjpeg is at the "picasso" level of quality. > To be honest, my particular video source will have trouble managing > 300 lines of horizontal resolution, so I'm sure 320x240 is the way > to go. I've always thought that the horizontal lines of resolution that get quoted for analog video need to be doubled when you talk about digital resolution. 300 lines means that you can have an image of 300 alternating white and back lines (600 total) before the black and white lines start to merge into gray. CCIR 601 specifies 720 pixels horizonatally, which equates to 360 horizontal lines in analog specs. VHS tape is typically less than 200 lines, and a 352x240 VCD is considered slightly worse than VHS.
