http://livedocs.adobe.com/ Macromedia LiveDocs - online documentation with user feedback. Copyright 2009, Macromedia, Inc. 2009-11-25T12:29:44 en-us http://livedocs.adobe.com/flash/9.0/flvencoder/FLV_11.html#91875 The above was a confusing explanation for me. I had some 4:3 video and some 16:9 video that I wanted to put together in one project. I envisioned the 4:3 content having black vertical columns next to it, and any 16:9 stuff just taking up the whole screen. Here's what I did: output my project as an AVI from Premiere Pro CS3 as NTSC Widescreen (1.2 pixel aspect ratio).<br /><br />I soon encountered a problem: Flash CS3 in the File > Import Video dialog that I use to import my video doesn't seem to offer a 16:9 conversion. However, you can resize the video in the Encoding step in the Resize section. (uncheck the "Maintain Aspect" ratio button and enter above a pixel dimension that will be 16:9). But how do you ensure the resulting dimensions of the image are not too stretchy or squishy?<br /><br />How many pixels wide do you want your 16:9 video to be? If you know how wide you want the final video to be,<br />Divide 9 by 16 to get 0.5625. Multiply your width number of pixels (in my case 444) by 0.5625 and you get 249.75. Round it up to 250 pixels...that's close enough...and you're set. Put those numbers in the height and width box, maybe drop your frame rate to 15 fps instead of Same as Source, just to reduce file size. (Look in the Video section of the Encoding step...it's a couple of tabs to the left of the Resize box.)<br /><br />If you know how tall your want your video display to be in pixels, divide 16 by 9 to get 1.7777778. This is your multiplier ratio. Now, take the height you want the final video to be in pixels (let's say it's 250) and multiply that by 1.77. The result tells you your video needs to be 442.5 pixels wide to maintain your correct 16:9 aspect ratio. Round 442.5 up to 443 and you're set. Put those number in the height and width resize box, and click next to encode.<br /><br />(Remember, in my scenario I exported the video from Premiere as a NTSC Widescreen 1.2 AVI file.)<br /><br />Anyhow, this worked for me. Hope it helps! 0 0 2009-01-14T12:04:54 http://livedocs.adobe.com/flash/9.0/flvencoder/FLV_11.html#68481 The information on this page is an example of 2 wrongs make a right. <br /><br />The technically correct Pixel Aspect Ratio (PAR) for NTSC D1 and DV <br />video is indeed 10:11. However, most applications (including Adobe <br />After Effects and Premiere Pro) use 9:10. They arrive at this number by <br />incorrectly applying the math on this page to a professional D1-standard <br />720x486 pixel video frame. (D1 frames have a touch of additional <br />"overscan" on the left and right so that common processing, such as <br />blurs, would be less likely to drag edge artifacts into the actual image <br />area. Including this overscan into the PAR calculation is what gives the <br />incorrect 9:10 result that everyone uses.)<br /><br />An NTSC DV frame is a subset of a D1 frame: You take 6 lines off a <br />720x486 D1 frame (usually 4 from the top, 2 from the bottom) to create a <br />720x480 pixel DV frame. Both standards have the same PAR.<br /><br />As the vast majority of applications use a PAR of 9:10 for NTSC D1 and <br />DV frames, it is probably best to do so in Flash Video as well, for <br />consistency and compatibility with other applications. If converting from a <br />square-pixel 4:3 source to a DV output, you would then trim the <br />remaining pixels off the top and bottom to get a 720x480 output. You <br />would not need to do any trimming to create 720x486 output. 0 0 2007-06-29T11:49:42