vegas adding gain and blocking on dv files

K

kill_me_killroy

Member
Hello everyone. New dvx owner and user of vegas.
My story, please help.
I recently shot a quick scene of a fire at night on my dvx100be, and when I imported the footage and played it back with windows media player it seemed a lot worse than I remembered it being, the blackness of night was showing up as near grey, and the fire was blocking. I blamed the crapness of dv compression in dealing with these extremes or darkness and light. However when I rendered it in vegas to an uncompressed rgb file the quality seemed to deteriorate even more. So I thought ild try rendering it in VirtualDub, opened it up and the original dv file had now returned to showing blackness in stead of greyness and the fire had lost its blocks.! and after the rgb render it looked exactly the same.
I then tried playing the original dv file in media player classic this time changed the overlay mixer to haali from the windows built in options and this time it played back how I expected it to. !!!
now the uncomp rgb file from virtual dub plays back correctly in vegas, so im not sure what is happening.
So are the open source elements of virtual dub and media player classic with haali overlay dealing with it properly ie. using the correct dv codec, or are they applying some kind of magic? If so how can I get vegas to apply the same kind of magic. Otherwise im going to have to get virtual dub to render all my footage as an uncompressed rgb file before I can let vegas touch it, and im sure that is not the way people do it. – so what am I doing wrong?

Thanks for anyhelp .
 
also, if i render the file in vegas using a dv codec or mpeg2 instead of uncompressed then the resulting file does play properly when veiwing it with haali overlay in media palyer classic (meaning it doesnt screw it up like it does when rendering it uncomp), however, they have now undergone some loss of quality and when these files are re-opend in vegas they are again showing the same extra gain and blocking, which makes any sort of exposure/colour correction impossible.

here are links to some screen caps so you can check the diference yourselves.
(one of my monitors shows the extra gain up more and another shows the blocking more :undecided but that is another issue)

virtualdubs reading of the orginal dv file (same as its uncompressed version)
http://myweb.tiscali.co.uk/bbiproductions/org.bmp

vegas's idea of uncompressed and what i see as the orginal dv in preview window.
http://myweb.tiscali.co.uk/bbiproductions/unc.bmp
 
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http://www.dvxuser.com/V6/showthread.php?t=92748

i found this thread talking about a similar issue with FCP dealing with highdef.
it reduced gamma and added the blocks, where as mine is increasing gamma and adding blocks.

the blocks do not exist on the footage, as virtualdub has demonstrated, despite the fact that its easy to assume they do due to the extremities of the footage. as far as i can tell vegas is reading the file wrong and then when rendering as an rgb (studio or computer i dont know, but 24bit or 32bit = the same results) actually corrupts it to this wrong interpretation,

----

ive managed to get rid of the gain/gamma/brightness (whatever it was) difference by selecting 'use microsoft dv codec' in the settings. however the blocks still persist.
 
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http://dvxuser.com/V6/showthread.php?t=103968

also found this thread, -- it appears as though everyone is putting up with this blocking issue and saying its a problem with the footage and the dv formats weaknesses !

i took this shot to test it out, my hand under a red light.
looked good in the camera and camera playback. looked good as i was importing it. vegas then showed it up blocky and rendered it uncompressed rgb as blcoky.

http://myweb.tiscali.co.uk/bbiproductions/vegas_red_hand.BMP

opened up the dv file in virtual dub, looked exactly how i would expect, and rendered how i would expect.

http://myweb.tiscali.co.uk/bbiproductions/virtualdub_red_hand.BMP
 
well anyone reading this thread should know that vegas DV codec is a heap ###
adding gain and blocking reds badly
microsoft codec is a touch better in that it doesnt add any gain, but still cant handle them reds.
to solve all the problems install the open source Cedocida dv codec
http://neuron2.net/misc/cedocida017.zip
and hope that it becomes your default DV codec.
Make sure you do not have 'ignore 3rd party codecs' checked.
 
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