Choosing the optimal video resolution Some people want to win the world series.Others want to become president of the united states.I want to be the guy who rid the world of nonsquare pixel video. I can see it now, at my 50th high school reunion, the guidance counselor who never thought i would amount to much, ancient at 95 but still feisty, asking"Well, ozer, what did you do with your life? "Smirking in expectation. I slowly pull myself up to my shrunken 6'1"And respond haughtily"I, sir, rid the world of 352x240 mpeg1 files created for playback on computers, and then, just for fun, exiled 720x480 mpeg2 files.I explained the problems with rectangular pixels and the need for square pixels to the digital video glitterati, a previously inexplicable topic, gaining fame and fortune. " When the internet first came along, i banished 176x144 resolution forever, standing up against mighty microsoft, stamping my feet and shouting: I do not like it on abc, I do not like it on mtv. I would not, could not on cnn, I would not, could not on espn. It can't be 176x144, bill g. Because then it isn't christian louboutin booties 4:3! Ok, so the vision still is a bit rough, and obviously impacted by reading time with the kiddies.But perhaps somewhat scarily, it's not too far from the truth, this has been my quest now for several years.Here's why. Encoding your digital video files to the wrong video resolution can distort the appearance of your video, plain and simple(And make your boss look like she gained 20 pounds, never a good idea).And because many highly respected programs, like media 100's cleaner, as well as standard tools like microsoft's windows media encoder, use incorrect resolutions in their presets, many producers have inadvertently distorted their video. As we'll see, the issue first raised its ugly head back in the mid 1990s, when mpeg1 encoders first hit the market.Unfortunately, the problem expanded into the streaming world, where it impacts many more producers. Now, with extremetech as our public forum, we've gone to the vendor community and presented our best evidence.So, read on to learn the difference between rectangular and square pixels and how televisionbased standards came to impact streaming video, and of course, whether microsoft was ultimately swayed by my seussian logic. It's an interesting article although it misses some rather vital facts, or at least simplifies from the cheap christian louboutin replica shoes uk nitty gritty! The reason that digital video is using 720 samples per picture width is because it was decided to have a common sample size for both 525/60(Ntsc)And Discount Christian Louboutin Pumps Sale UK 625/50(Pal)And 720 was a good compromise number.Since the number of active lines for each standard is in inverse ratio to the frame rate, the final data rate is almost the same and a lot of digital video equipment can use common hardware. What is less clear is that the 720 samples represent a wider image than the active analog version.In pal about 702 samples are active, in ntsc it is about 710.These active samples are thus those representing the 4:3 image size.However ntsc has 486 active lines, but digital video often truncates this to 480;Maintaining the 4:3 aspect ratio means the width must be truncated to 702 which is coincidentally the same as PAL. So to summarise, the true 4:3 image size for digital video such as MPEG2 is: Ntsc 702x480 Pal 702x576 Originally posted by the website perrymitchell Thanks for your note. Much of what you're saying is new to me, and i appreciate your contribution. I have to admit having problems following your math, and every hardware and software mpeg2 encoder i've looked at encodes at 720x480(In default mode, you can manually adjust mostto any desired compression resolution). Further, if i look at the specifications ofhigh end real time mpeg2 encoders designed for thecable tv market, they generally support 720x480, then 704x480(The so called half height d1), but not 702x480. So could you expand a bit on your discuss and perhaps be a bit more specific where you would use these resolutions? christian louboutin booties4:3! Ok, so the vision still is a bit rough

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