Quote:
Originally Posted by michaeltscott 
As I said above, I think that the data sent to a streaming player in the 10 minute shown in the graphs does not represent 10 minutes of video. The 10 minutes worth of video played while it was receiving that data is part of it, but at the end of that 10 minutes there's still unplayed video data in the player's buffer. If you stopped sending the stream after that 10 minutes and let the unplayed buffer play to its end, the total duration of the video would be more than 10 minutes; how much more depends upon the size of the player's buffer, the buffering algorithm it uses and the amount of excess bandwidth available.
If you look at the first Roku Netflix graph that I posted (the blue and red one), you'll see the player was sent 319.41 MB of video data in that 10 minutes:

As I said above, I think that the data sent to a streaming player in the 10 minute shown in the graphs does not represent 10 minutes of video. The 10 minutes worth of video played while it was receiving that data is part of it, but at the end of that 10 minutes there's still unplayed video data in the player's buffer. If you stopped sending the stream after that 10 minutes and let the unplayed buffer play to its end, the total duration of the video would be more than 10 minutes; how much more depends upon the size of the player's buffer, the buffering algorithm it uses and the amount of excess bandwidth available.
If you look at the first Roku Netflix graph that I posted (the blue and red one), you'll see the player was sent 319.41 MB of video data in that 10 minutes:
I think that at the end of that 10 minute window, the Roku had approximately 72.44 seconds worth of video left to play in its buffer.319.41 MB x 8 bits-per-byte = 2555.28 Mbits / 3.8 Mbps = 672.44 seconds
That sounds like a reasonable explanation.














. Stereo/720p on the PS3 consumed 305.05 MB, so:
305.05 MB x 8000 Kbits-per-MB = 2440400 Kbits / 3800 Kbps = 642.21 seconds
Stereo/1080p on the PS3 brought down 407.98 MB; if we assume that it was also 642.21 seconds worth:
407.98 MB x 8000 Kbits-per-MB = 3263840 Kbits / 642.21 seconds = 5082 Kbps
Now, if we also assume 642.21 as the duration of 10 minutes streamed with 5.1 sound, for DD+/720p we get:
311.11 MB x 8000 Kbits-per-Mbyte = 2488880 Kbits / 642.21 seconds = 3875 Kbps
For DD+/1080p on the PS3 we get:
415.44 MB x 8000 Kbits-per-MB = 3323520 Kbits / 642.21 = 5175 Kbps
That makes DD+ a paltry difference in bandwidth versus stereo--75 Kbps on the 720p stream, 93 Kbps on the 1080p one (whatever the real number is, it's probably the same for both, but these calculations are definitely not accurate to within 18 Kbps; if we round 5082 Kbps up to 5100, it's a flat 75 Kbps difference).
.
). For $130, it's pretty impressive. Netflix, Amazon, VUDU, CinemaNow, Video Skype, etc, and it's a 3D BD player. It can also apparently play video on DLNA servers in your home.



