Originally Posted by atc98092
I've seen bitrates exceed 44 Mbps, which was pretty much my upper speed limit available. I've heard others report YT 4K videos in excess of 50 Mbps.
So have I, if "Connection Speed" in the "Stats for Nerds" is the encode bit rate, which I suspect may not be true. I'm just looked at a 4K trailer for Wonder Woman (25 fps received as a 24Hz signal from my Roku Premiere+) and this is what I see on my router's bandwidth monitor:
It shows an average bit rate of 402.78 KiB/s which is about 3300 Kbps. Kind of remarkable for 4K even in VP9. Connection speed ran 80 Mbps+ throughout. YouTube requests 4K in AVC at 35-45 Mbps for 4K@24- or 30 fps, 53-68 Mbps for 4K@48-, 50- or 60 fps. They transcode that into VP9 using at a bit rate of their choosing.
I tested this clip (very crisp in 4K, again 25 fps displayed at 24Hz, this time on my TiVo Bolt):
and got this from my router's bandwidth monitor:
Which is only 5352 Kbps; again, remarkable. Connection speed was 90 Mbps.
I then watched this 60 fps 4K clip (shot in 8K):
and got this from my bandwidth monitor:
...indicating 3743 Kbps. Connection speed ran around 80 Mbps (I have 300 Mbps cable modem service from Cox).
Very high bit rates for YouTube streams is apparently an urban legend
Anyone know of a supposedly super-high bit rate clip on YouTube?
EDIT: I found a YouTube downloading extension to Firefox and downloaded those clips to see what bit rates the file was encoded in (video only; I don't know how to get a combined file and don't care since I only downloaded them to see the bit rates and not to play). I downloaded all of them as VP9 in webm containers; they came down incredibly fast, with no heavy computation so they weren't being converted by my machine. The Wonder Woman trailer was 2160p25 at 9.8 Mbps, the beach scene was 2160p25 at 17.3 Mbps and the Peru thing came in three 2160p+ forms, 2160p30 at 16.9 Mbps, 2160p60 at 24.7 Mbps and 4320p60 (8K) at 65.9 Mbps. These aren't consistent with streaming bit rates that I observed; I don't know why.