zettai
17th March 2003, 00:54
Hi all,
I have a couple of questions that all relate to the same problem:
I recently purchased the Kiss DP-450 dvd player with mpeg4 support. It handles things pretty well but unfortunately has one recurring problem to do with playback:
It has a maximum bitrate of 3mbits/second (I think the DVD-rom drive in the machine can do 16x for CDs)
So, I have to cap my encodes to a 3mbit ceiling.
Now, usually I'd just do cq2 encodes and do a 2nd pass if I really need to squeeze the encode onto a desired cd amount. However, I can't do cq2 with a max bitrate setting. This leaves me with two options, i think....
1) Do a CBR encode at 3mbits/s
I've no idea if this will amount to the same as cq2 most of the time except when you need more bits or whether this will actually make my encode larger than it should be.
2) Do a 2 pass with a max bitrate setting
I don't know if the curve is scaled with the ceiling in mind. Does it calculate the curve as normal then flatten the top? If so, does it give those bits back to lower bitrate areas?
Essentially all I want to know is which method would give me the best encodes given the need for a bitrate ceiling.... there are just some scenes that will always max out a bitrate (scenes of pure noise, etc) and this kills playback. Is there going to be an effecive difference between methods 1 and 2?
Thanks in advance for any and all opinions :)
I have a couple of questions that all relate to the same problem:
I recently purchased the Kiss DP-450 dvd player with mpeg4 support. It handles things pretty well but unfortunately has one recurring problem to do with playback:
It has a maximum bitrate of 3mbits/second (I think the DVD-rom drive in the machine can do 16x for CDs)
So, I have to cap my encodes to a 3mbit ceiling.
Now, usually I'd just do cq2 encodes and do a 2nd pass if I really need to squeeze the encode onto a desired cd amount. However, I can't do cq2 with a max bitrate setting. This leaves me with two options, i think....
1) Do a CBR encode at 3mbits/s
I've no idea if this will amount to the same as cq2 most of the time except when you need more bits or whether this will actually make my encode larger than it should be.
2) Do a 2 pass with a max bitrate setting
I don't know if the curve is scaled with the ceiling in mind. Does it calculate the curve as normal then flatten the top? If so, does it give those bits back to lower bitrate areas?
Essentially all I want to know is which method would give me the best encodes given the need for a bitrate ceiling.... there are just some scenes that will always max out a bitrate (scenes of pure noise, etc) and this kills playback. Is there going to be an effecive difference between methods 1 and 2?
Thanks in advance for any and all opinions :)