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How much does a DVD really hold?
jerrys
Senior Contributor Location: New Britain, CT, USA (between New York and Boston) Joined: Feb 10, 2010 21:36 Messages: 1038 Offline
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How is it that a DVD can hold a movie, out-takes, commentary, and for all I know fries and a shake, but PD seems to think a DVD will hold about an hour's worth of my 4:3 stuff?

Turning that around, how does the bit-rate, etc. of a standard movie on DVD compare to the various settings in PD? Jerry Schwartz
JL_JL [Avatar]
Senior Contributor Location: Arizona, USA Joined: Oct 01, 2006 20:01 Messages: 6091 Offline
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Quote: Turning that around, how does the bit-rate, etc. of a standard movie on DVD compare to the various settings in PD?

Many "production" movies run avg bitrates of about 4-5Mb/sec and virtually all use variable bitrate achieved with a highly efficient multipass encoder to achieve such great quality even in fast motion scenes. Virtually all dvd movies are also dual layer and have been for years. PD on the other hand uses a constrained variable bitrate with an avg of 8Mb/sec, (max=8.3) , as you can see, one is virtually 50% behind the eight ball already. PD is a average consumer encoder and in my opinion subpar to several in the same price range or free. Good at editing features, poor at DVD HQ encoding.

I actually get much better DVD HQ quality by preproducing outside of PD a MPEG2 which I then use in the PD timeline for editing. If you keep within known bitrate guidelines, SVRT will be used when creating a DVD or DVD folder and only "edited" sections see a minor quaility degradation. Some are happy with PD DVD HQ encoding, I find it lacking in quality for the things I film.

Jeff

This message was edited 1 time. Last update was at Sep 28. 2011 21:10

jerrys
Senior Contributor Location: New Britain, CT, USA (between New York and Boston) Joined: Feb 10, 2010 21:36 Messages: 1038 Offline
[Post New]
Quote:
Quote: Turning that around, how does the bit-rate, etc. of a standard movie on DVD compare to the various settings in PD?

Many "production" movies run avg bitrates of about 4-5Mb/sec and virtually all use variable bitrate achieved with a highly efficient multipass encoder to achieve such great quality even in fast motion scenes. Virtually all dvd movies are also dual layer and have been for years. PD on the other hand uses a constrained variable bitrate with an avg of 8Mb/sec, (max=8.3) , as you can see, one is virtually 50% behind the eight ball already. PD is a average consumer encoder and in my opinion subpar to several in the same price range or free. Good at editing features, poor at DVD HQ encoding.

I actually get much better DVD HQ quality by preproducing outside of PD a MPEG2 which I then use in the PD timeline for editing. If you keep within known bitrate guidelines, SVRT will be used when creating a DVD or DVD folder and only "edited" sections see a minor quaility degradation. Some are happy with PD DVD HQ encoding, I find it lacking in quality for the things I film.

Jeff

Thanks.

If I understood you correctly, you're saying that the big boys use clever encoding that can figure out what bit-rate is needed depending upon the contents of the scene; that brings the average bit-rate way down. PD9, on the other hand, just picks a rate and sticks to it.

I went and looked up SVRT, so I understand how you can sneak things through. Jerry Schwartz
JL_JL [Avatar]
Senior Contributor Location: Arizona, USA Joined: Oct 01, 2006 20:01 Messages: 6091 Offline
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Quote: If I understood you correctly, you're saying that the big boys use clever encoding that can figure out what bit-rate is needed depending upon the contents of the scene; that brings the average bit-rate way down. PD9, on the other hand, just picks a rate and sticks to it.


Yep.

Also keep in mind that 5Mb/sec bitrate on a commercial encoder is nothing like 5Mb/sec on a consumer encoder. Again, muliple $1000's to $100's in encoder technology so a tough comparison. In like PD6 days I took a piece of raw footage from a Canon mindv tape to a professional shop locally and had them capture/encode to DVD, I did the same in PD, nothing close in quality or resulting DVD size as one would expect.

Jeff
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