Question / Help CPU needed for 1080p 60fps

[fsy]

Hi,

Wondering if there's a consensus for what CPU is needed for 1080p 60 fps streaming, superfast @ 3500kbps.


I'm on a i7-2600K and mine chokes, i have to downscale to 720p....even with that downscale the CPU's working very hard.


NVENC would be great if the quality wasn't so bad at 3500kbps.

 

[bifuteki]

Why the "need" to stream at 1080p. Where 720p is just fine.

 

[Videophile]

You would need a 5960x, and then the X264 preset would probably be default or maybe even superfast. 1080p60 is VERY VERY VERY hard to encode. Dont. Do. it.

 

[fsy]

Why the "need" to stream at 1080p. Where 720p is just fine.

i play @ 1080p. When anything is re-sized it looks blurry as hell, was just curious what type of hardware I'd need to overcome this.

Of course 1080p30fps is another option...but i like smooth motion.

 

[Videophile]

i play @ 1080p. When anything is re-sized it looks blurry as hell, was just curious what type of hardware I'd need to overcome this.

Of course 1080p30fps is another option...but i like smooth motion.

Let me put it this way: Twitch's bit rate limit is 3500. 1080p30 at 3500 looks bad. Downscale to 720p60 using the lancsoz filter instead.

Yes, it will look worse in stream, since you can compare the direct feed, but a 2600k can handle a LOT(I use one).

 

[fsy]

Let me put it this way: Twitch's bit rate limit is 3500. 1080p30 at 3500 looks bad. Downscale to 720p60 using the lancsoz filter instead.

Yes, it will look worse in stream, since you can compare the direct feed, but a 2600k can handle a LOT(I use one).

thanks for the advice, will reconfigure as you suggest.

 

[Smoshi]

Twitch partners can go as high as 10,000 bitrate, as far as I know.

 

[fsy]

Twitch partners can go as high as 10,000 bitrate, as far as I know.

10k would bring NVENC possibly into the mix. from my experience it's great, but you need to allow it a lot of bandwidth compaired with x264.

anyway, as unpartnered as i am it looks like i'll go with 720p via lancsoz, 60fps, @3500kbps

 

[Boildown]

Check afterwards that you can play back the video you create when doing 1080p60. Because Flash player has some serious issues playing it back usually. And your viewers may have that problem in addition to their "broadband" connections being unable to download the 3500 bitrate.

When I play a Twitch VOD back with FRAPS framerate monitor running, the framerate usually varies between 30 and 50fps, never is consistent at 60fps, even on videos encoded at 60fps. Which is why I backed my Twitch streams down to 40fps.

 

[fsy]

Check afterwards that you can play back the video you create when doing 1080p60. Because Flash player has some serious issues playing it back usually. And your viewers may have that problem in addition to their "broadband" connections being unable to download the 3500 bitrate.

When I play a Twitch VOD back with FRAPS framerate monitor running, the framerate usually varies between 30 and 50fps, never is consistent at 60fps, even on videos encoded at 60fps. Which is why I backed my Twitch streams down to 40fps.

1080p 60fps @ 3500kbit looks dreadful....i've not bothered with it at all.

 

[FerretBomb]

Twitch partners can go as high as 10,000 bitrate, as far as I know.

No, the max recommended for partners is still 3500kbps; higher than that is at-your-own-risk, as the ingest servers may start causing problems if they aren't able to handle the data stream. The line when a stream starts to be considered a denial-of-service attack is 6000kbps.

As far as the OP, the 'golden point' for non-partners is 720p@30fps, 2000kbps. It's the best tradeoff between resolution, smoothness, and allowing the most viewers to be able to watch without buffering horribly.

Don't get lost chasing numbers/quality. I did when I got started for the longest time, and it really hurt my stream until I pulled my head out and came to peace with the fact that you absolutely have to work within the technical limitations available to you. No one will come to your stream for crystal-clear 1080p video. But people sure as hell will leave if they get stuck in buffering hell.