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Contrast is not as advertised in the scopes
Hi all,
Well now that my MAC to PC problem has been solved, we exported all in QT Animation, I can get on with the project.
I dropped all files into the timeline and now I am in the process of reapplying the slow-mo effect to my clips, here’s my workflow for that:
1: I frameserve the clip out of Vegas into an AVS script that does slo-mo
2: I open the script through VirtualDub and export the clip in a lossless codec, in this case I use Huffyuv.
3: I re-import the clip, now slow-moded, into Vegas
Here’s the thing though, even if this is a lossless codec the contrast has changed. In the waveform the whites went to about 85 and they are in the 80.
Just a minute ago I was scrubbing a clip to make it shorter and I noticed in the preview window that the contrast seemed to have gone back to normal. When I stop scrubbing the contrast was not normal again. Take a look at the screenshots, 01 is for when I am scrubbing and 02 is for when I am not.
Now if the Huffyuv is not entirely lossless and something happens to the file when I converted it then why does it show the proper (original) contrast when I scrub the clip?
Thanks for your input
Phil
ps, I’ve tried with another lossless codec, this time with Lagarith, and the result is the same.
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1 Reply
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Somewhat of an update.
It dawned on me that this scrubbing effect is very much like when scrubbing through an FX’d event. When I scrub the preview window shos the original video.
Now I just drop an event on the timeline, this time the original MOV file recorded by my 60D, and guess what, the contrast still is different when I scrub through that event.
Furthermore, if I activate the “Split Screen View” in the preview window (set to FX Bypassed) the original contrast shows through. It is as if I applied an FX even though it is not the case.
More confused than before….
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