DV uncompressed? at DVinfo.net

Josh Bass · November 24th, 2004, 10:43 PM

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.

Rob Lohman · November 25th, 2004, 04:00 AM

Josh: DV is 5:1 lossy compressed, sorry!

Josh Bass · November 25th, 2004, 05:14 AM

I'm rolling my eyes. Still less compressed than getting it on DVD.

Rob Lohman · November 25th, 2004, 05:21 AM

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!

Alfred Okocha · November 25th, 2004, 06:01 AM

See.. I didn't know that.. about compression. What would be uncompressed then if I might ask?

Thanks.

Rob Lohman · November 25th, 2004, 07:00 AM

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).

Josh Bass · November 25th, 2004, 11:39 AM

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.

Rob Lohman · November 25th, 2004, 01:45 PM

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.

November 24th, 2004, 10:43 PM	#1
Josh Bass Slash Rules! Join Date: Apr 2002 Location: Houston, Texas Posts: 5,472	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. __________________ The Bass' camerawork The Bass on IMDB

November 25th, 2004, 04:00 AM	#2
Rob Lohman RED Code Chef Join Date: Oct 2001 Location: Holland Posts: 12,514	Josh: DV is 5:1 lossy compressed, sorry! __________________ Rob Lohman, visuar@iname.com DV Info Wrangler & RED Code Chef Join the DV Challenge \| Lady X Search DVinfo.net for quick answers \| Buy from the best: DVinfo.net sponsors

November 25th, 2004, 05:14 AM	#3
Josh Bass Slash Rules! Join Date: Apr 2002 Location: Houston, Texas Posts: 5,472	I'm rolling my eyes. Still less compressed than getting it on DVD. __________________ The Bass' camerawork The Bass on IMDB

November 25th, 2004, 05:21 AM	#4
Rob Lohman RED Code Chef Join Date: Oct 2001 Location: Holland Posts: 12,514	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! __________________ Rob Lohman, visuar@iname.com DV Info Wrangler & RED Code Chef Join the DV Challenge \| Lady X Search DVinfo.net for quick answers \| Buy from the best: DVinfo.net sponsors

November 25th, 2004, 07:00 AM	#6
Rob Lohman RED Code Chef Join Date: Oct 2001 Location: Holland Posts: 12,514	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). __________________ Rob Lohman, visuar@iname.com DV Info Wrangler & RED Code Chef Join the DV Challenge \| Lady X Search DVinfo.net for quick answers \| Buy from the best: DVinfo.net sponsors

November 25th, 2004, 06:01 AM	#5
Alfred Okocha Major Player Join Date: Feb 2004 Location: London Posts: 427	See.. I didn't know that.. about compression. What would be uncompressed then if I might ask? Thanks.

November 25th, 2004, 11:39 AM	#7
Josh Bass Slash Rules! Join Date: Apr 2002 Location: Houston, Texas Posts: 5,472	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. __________________ The Bass' camerawork The Bass on IMDB

November 25th, 2004, 01:45 PM	#8
Rob Lohman RED Code Chef Join Date: Oct 2001 Location: Holland Posts: 12,514	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. __________________ Rob Lohman, visuar@iname.com DV Info Wrangler & RED Code Chef Join the DV Challenge \| Lady X Search DVinfo.net for quick answers \| Buy from the best: DVinfo.net sponsors