Mediashout 6 movie plays upside down1/21/2024 Note that Y is the brightness and Cr and Cb are the color. Wikipedia has a nice graphic in their chroma subsampling article which shows the different methods and what they do to a block, it's about ¼ down the page. If it hasn't been scaled, it'll hopefully line up (but it will be scaled, see #2) (DVD Video forces you to use 4:2:0, so this is unavoidable). This does pose a problem with rotating it, though, at least if its been scaled at all. Why? Well, color is ⅔ of the data - so going from 8 color pixels down to 2 halves the data rate. One common method, called 4:2:0 subsampling, takes every 4×2 block of pixels and discards the color information from half of the pixels on the top row and all of the pixels on the bottom row. One of those tricks takes advantage of the human eye being less sensitive to color differences than brightness differences by discarding a lot of the color information. First off, video uses a bunch of tricks to get what is really a high data rate - almost 3 gigabits/second for - down to a manageable data rate. That said, there will probably be loss of quality for two reasons:Ĭhroma subsampling. So, if you can find a DVD creation program that understands orientation metadata (or can be told to rotate the video) you don't have to add another re-encode. DVD Video requires MPEG-2 - those are two different codecs, thus you have to re-encode. But actually you already are: your phone probably records H.264 (MPEG-4 AVC). Moshe Katz's answer is right that you'll have to re-encode the video with it rotated.
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