I have a couple of Twitch streams that I frequent, and from time to time I've noticed lag / stutter with them at source speeds.I figured that 10 Meg (my general connection speed) should be adequate, but not so.To be pedantic, my speedtests tend to be 9.5 Meg to 10 Meg.
Here's a look at the TBB monitor in action with 'Source' bit-rate (unknown with specific stream, but probably 900 x 60 or 1080 x 60), 720 x 60 and 720 x 30 - Linky 1
I found it odd that the middle speed registered a lower load on the connection, albeit sustained, rather than bursts.The source speed bursts in that pic are about 10 Meg.
So I decided to try the old SNR to 3dB to see if I could squeeze some more from the connection. The pre-tweak sync was 11,975Kbps, and after tweaking it rose to 13,335Kbps. Running the same tests again, I got this - Linky 2
The source bursts are closer to 11.3 Meg or so, and it seems I have gained a potential 1.25 Meg increase. Yet again, the middle speed of 720 x 60 was sustained and low, but then rose and started bursting. The best thing is that the lag / stutter on source speed seems to be far less. My best guess is that one should have a realistic minimum BB speed of 12 Meg for 900 x 60 or 1080 x 60 to get the best experience.
Pings to TBB since SNR tweak are unchanged - Linky 3. Not sure of the best place on Twitch to trace. live.etc is not responding to ICMP.
Strange that the TBB speedtests are still in the 9.5 Meg to 10 Meg range. Not sure why, and the file downloads are similar - Linky 4. The tests are standard TBB, then standard 50MB file, standard 100MB file, then port 81 50MB file.
For those on ADSL2+ and under 12 Meg, a little SNR tweak might alleviate some of the stream issues. I really should upgrade to FTTC, but until 1080 x 60 streaming, I've not needed it.