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November 24th, 2004, 10:43 PM | #1 |
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moderator notice: this thread was split of from another
thread: http://www.dvinfo.net/conf/showthrea...threadid=33082 DVD? Give it to me on miniDV--I don't want no compression. |
November 25th, 2004, 04:00 AM | #2 |
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Josh: DV is 5:1 lossy compressed, sorry!
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November 25th, 2004, 05:14 AM | #3 |
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I'm rolling my eyes. Still less compressed than getting it on DVD.
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November 25th, 2004, 05:21 AM | #4 |
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True, I just wanted to make the remark because it is a large
"myth" that DV is uncompressed, especially in the people who are knew to this, you never know who might be reading the things you write Josh!
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November 25th, 2004, 06:01 AM | #5 |
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See.. I didn't know that.. about compression. What would be uncompressed then if I might ask?
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November 25th, 2004, 07:00 AM | #6 |
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Well, it has no other name than uncompressed. When you export
to AVI or QuickTime you can either choose "none" for the codec or choose "uncompressed" and it will write a .AVI or .MOV file with the full RGB uncompressed information in there. To slightly expand the topic a bit futher: there are two forms of compression: lossy and lossless (I'm not gonna talk about near lossless now). Lossy tosses information out to reduce information, DV, MPEG, AC3, dts, MP3, Sorenson are all lossy compression formats. There are also lossless compression formats that compress material by looking for patterns that can be reduced without throwing out actual information. Examples of these are ZIP, RAR and for video HUFFYUV (among others).
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November 25th, 2004, 11:39 AM | #7 |
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I've heard about this. . .
But you can't get a better picture than what you started with, right? If I import clips off my tape, into Vegas, for example, and then render one as "uncompressed", or one of the lossless codecs, I'm not improving anything, am I? I remember doing this a while back, and the file sizes were huge, compared to what they should have been for how long the clips were. |
November 25th, 2004, 01:45 PM | #8 |
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Uncompressed can be handy if you need to transfer footage
between applications and you can thus save on extra generational loss. The clips certainly are huge in uncompressed (de-compressing a compressed file always gets bigger -> like a ZIP file). For example: 720 x 480 x 30 fps x 3 colors = almost 30 MB/s or 1.75 GB/min.
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