said by camper:
I took a snapshot of the traffic at the beginning and the end of the movie. The numbers are:
Date Time Downstream Upstream
Apr 18 13:36:22 4,562,200,162 562,646,050
Apr 18 15:20:57 7,633,710,744 613,650,259
That difference is 3072 MBytes.
Using VPC1 HD rate of 3.8 Mbits/Sec, WMA 2.0 Audio Encoder rate of 220 kbits/Sec including protocol overhead sums to an aggregate rate of 4.02 Mbits/sec.
102 minute movie is 6120 seconds in length.
The movie has a total size of:
4.02 Mbits/Sec * 6120 Sec = 24,602 Mbits.
Converting from bits to Bytes:
24,602 Mbits / ( 8 bits / 1 Byte ) = 3075 MBytes or 3.075 GBytes.
So all the math works as expected within an error factor of 1*10^-4
That rate can be generalized to 1809 MBytes/Hour ... for now.
Later this year Netflix is supposed to start streaming multichannel audio which will bump up the audio rate between 250 and 500 kbits/sec. That moves the aggregate rate for an HD movie to 1935 Mbytes/Hour.