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Originally Posted by ronnylov
How is the maxrate of 15 Mbit/s achieved when encoding with x264 and not using CBR?
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By using VBV.
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Is it enough to set vbvmaxrate to 15 Mbit/s? There still may be short peaks above 15 Mbit/s?
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Buffer size must also be set -- according to the spec limits. "Peaks" don't matter as long as VBV is set correctly. Of course, quality will be lower in difficult scenes.
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But on the other hand why should anybody want to do that for bluray?
Maybe if stored on a slow medium (like DVD @ 1x DVD speed)
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That, or storing a large amount of video on a single disc. Longer keyint also improves quality at the same bitrate.