|Originally posted by Bjoern Roy:
enough is enough. Please stop the profanity or take your attitude to the newsgroups.
You know, you're right. While my irreverence is (mostly) meant for entertainment purposes, perhaps I will take this chance to tone down my cynicism with this hobby and all things related.
However, I respectfully disagree with your responses to my statements entirely. I've actually worked with mastering video for DVD (and yes, this includes working with different encoding methods).
Consider that the highest "peak" of bitrates are around 5-7 megabits. Some may even go up beyond the 7mb rate. But if you understand how MPEG video works, you'd realize that what has been said here is, for the most part, utterly foolish and wrong.
So, VBR chucks out unneeded bits and peaks. It peaks at 7 megabit (the highest I've ever seen was 6.8). So, where is the loss of bits in the fixed rate? There are none. In fact, you have more bits left over. Plus, depending on who encoded it (and the alignment of the moons and how many twinkie's they've had before breakfast, etc), they can really crank up the compression... tossing out more information... more PICTURE information.
So, instead of variable bitrate, we have a fixed bitrate. That means when the normal variable bitrate MPEG stream would peak, recede, peak, recede... the fixed high bitrate allocates a linear (bit wise) amount of bits to the entire picture.
Keep in mind that this is in simple terms. I could spend pages going on about how to allocate bits depending on key frames, I frames, A/S/L frames, blah blah blah.