On Mon, 18 Jun 2007 12:41:18 JST [EMAIL PROTECTED] (Andrew Church) wrote: > >I have found that when doing a two pass encode if I remove various options > >from the first pass I get a massive speed increase. The options I do not > >provide the first pass are croping/bordering (-j), filters (-J), zoom (-Z) > >and gamma (-G). > > Doing this means you're giving the first pass a completely different video > stream from the second pass. At best, you _might_ still get a small > improvement since the original source video is the same, but at worst (and > much more likely), you'll end up with a result that's actually worse than > one-pass encoding, as the codec will allocate bits to the wrong scenes, > taking away picture quality from where it's needed and giving it to where > it isn't.
Thank you. Do you know if the first pass data is used for more than calculating a bitrate for each set of frames? Jeff.
