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Bit-depth issues
Hi, my question relates to bit-depth settings, working with DV footage, for MPEG2 DVD output.
I recently watched a tutorial that that showed how to tick the Video Rendering/Maximum bit dpeth option. Ticking this option allows me to view the RGB parade, and scale down my RGB levels and retain all the colour detail that was previously beyond 100% on the RGB parade. If the Maximum bitdepth option was not ticked, it would result in a hard-clipping of any points previously above 100% on my RGB parade.
The Premiere sequence is an hour long wedding, and I have found that ticking max bit depth causes my render times to sky-rocket, even though I set rendering output to 8-bit.
I have always been under the assumption that DV is 8-bit, which is why I can’t understand why there was any data above 100% in the first place on my RGB parade..
I’m also a bit confused as to whether its my output that will be high bit depth, or just premier’s interal calculations..
Also, as I am rendering back to 8-bit MPEG2 DVD, is it worth the massive render times high bit depth brings?
hope you can help,
John -
2 Replies
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I dont think the maximum bit depth option relates to DV editing mode at all. I did test preview file rendering with this option on and no difference with it off.
First of all, this option involves preview files only and the quality of preview files for codecs that support various bit depths. DV does not offer this option.
You can create custom project settings using a different Editing Mode like Desktop and Format other than DV and then note that some Compressors offer various bit depths for previews. -
[john_ogroat] “I can’t understand why there was any data above 100% in the first place on my RGB parade..”
Digital Video can have a range of 0 to 255(8 bits) if you notice your monitor is topped at 100 which equals 235 digital there still is 20 digital more range possible to the signal
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