video bit rate change

sbenyamin wrote on 5/8/2003, 12:14 PM

I would like to change the video encoding bit rate in the middle of a home made movie because the second half has very very little motion. Is there a way to do this? I guess I can break the movie into two pieces and encode at different rates, but then how do I tell dvd architect to create a dvd such that the two pieces play back to back without coming back to the menu? I understand that mydvd can do this.
Thanks.

Comments

dvdfool wrote on 5/8/2003, 1:27 PM

If you encode the entire clip using VBR, I would think you'd achieve what you're looking for without having to break up the clip.

DVDA has limited linking abilities.

sbenyamin wrote on 5/8/2003, 1:35 PM

Thanks for your response. Do you think that VBR is smart enough to encode the first hour at one rate and the second hour at a different rate or does it look at a very localize section of the movie (say a couple of seconds to make its decisions?) I could use an encoder with a two pass engine such as TMPGEnc whic would have a better chance.

dvdfool wrote on 5/9/2003, 12:05 AM

In my experience, VBR adjusts at each scene. The more movement, the higher the encoding rate. I would think a "talking head" scene would encode really well with VBR.

But. . .I'm not an expert with the MainConcept codec.

Why not experiment and give it a try?

My old JVC DVD player would actually display the encoded bit rate for each scene as the DVD played. It was great for seeing which scenes required higher bit rates to encode. You might be able to do this with PowerDVD perhaps. Not sure.

sbenyamin wrote on 5/9/2003, 2:14 PM

Thank you.