Hawk
25th September 2002, 13:24
I have been reading a lot lately about Mpeg encoding and am curious to how Tmpgenc handles Motion Search precesion on the second pass.
It is clear to me the allocation of bits on the second pass becomes more accurate i.e. Bits are taken away from less complex scenes and given to more complex scenes in order to maintain a more contant quality.
But is the motion search precision also improved on the second pass?
For example say I encode a sample with 2500 CBR
Now I encode the same sample again with 300 min 2500 Average and 2500 Max, 2 pass VBR.(I would never do this!)
Will I gain anything by doing the 2 pass VBR with the average and max the same.
Will the motion search be more accurate? Is it possible I will introduce new distortions?
It is clear to me the allocation of bits on the second pass becomes more accurate i.e. Bits are taken away from less complex scenes and given to more complex scenes in order to maintain a more contant quality.
But is the motion search precision also improved on the second pass?
For example say I encode a sample with 2500 CBR
Now I encode the same sample again with 300 min 2500 Average and 2500 Max, 2 pass VBR.(I would never do this!)
Will I gain anything by doing the 2 pass VBR with the average and max the same.
Will the motion search be more accurate? Is it possible I will introduce new distortions?