Bitrate and Resolution Question.

[BiscuitMassacre]

Not sure if this is in the wrong section...

 

 

I record I my games at 1080x1920 (60FPS) at 50Mbps (constant). If I were to upscale the resolution to 1440x2560 (60FPS) what would I have to set the bit rate to to maintain the exact same quality as 50MBPS? 

 

(1440x2560) / (1920x1080) =  1.77

 

So would the correct bitrate be

 

50MBPS x 1.777 = 89 MBPS.

 

I know it doesn't really matter because the main reason I want to upscale is increased YT quality, and Youtube Only allows 24MBPS for 1440p60--- 12MBPS for 1080p60 ---, but I still like to have High Quality saves on my HDD. 

 

Is that math correct? BTW this is in Premiere Pro 2017. 

 

Remember this is Upscaling. So ~ 1.6 Million pixels will be artificial. Not sure if that matters...

 

[flibberdipper]

I tend to do 90Mbps for 1440p60, and it looks perfectly fine.

[MrKickkiller]

Bitrate doesn't have to scale perfectly with resolution.

 

I can perfectly record a 360p 5 fps clip, upscale that to a ridiculously high bitrate (eg 200 mbps) @ 1080p60 , upload it to youtube. The viewing experience would still be just like 360p5. Bitrate is mearly a measure on how much data you want to spend on the encoded video. Also depending on how much "action" is going in your video, you wanna tweak the bitrate. Generally a concert (black with many flashing lights) will need a higher bitrate than eg a panoramic shot of the hills.

 

Example from Tom Scott: 

 

[BiscuitMassacre]

12 minutes ago, MrKickkiller said:

Bitrate doesn't have to scale perfectly with resolution.

 

I can perfectly record a 360p 5 fps clip, upscale that to a ridiculously high bitrate (eg 200 mbps) @ 1080p60 , upload it to youtube. The viewing experience would still be just like 360p5. Bitrate is mearly a measure on how much data you want to spend on the encoded video. Also depending on how much "action" is going in your video, you wanna tweak the bitrate. Generally a concert (black with many flashing lights) will need a higher bitrate than eg a panoramic shot of the hills.

 

Example from Tom Scott: 

 

Thanks for that video. Really helpful. 

 

But Regardless, my question stands the same. Under Worst Case senario (lots of moving objects) , I want a clip of fully stressed 1080 to look exactly the same in 1440P.

[Mira Yurizaki]

Bitrate does not scale linearly with resolution, assuming you're using something like H.264. Plus how do you quantify "exact same quality" when you have two different resolutions?

[BiscuitMassacre]

2 minutes ago, M.Yurizaki said:

Bitrate does not scale linearly with resolution, assuming you're using something like H.264. Plus how do you quantify "exact same quality" when you have two different resolutions?

I am using H.264. literally all I want is a bit rate that will make my 1080 video not lose any quality when scaled to 1440p.

[michaelocarroll007]

47 minutes ago, BiscuitMassacre said:

Not sure if this is in the wrong section...

 

 

I record I my games at 1080x1920 (60FPS) at 50Mbps (constant). If I were to upscale the resolution to 1440x2560 (60FPS) what would I have to set the bit rate to to maintain the exact same quality as 50MBPS? 

 

(1440x2560) / (1920x1080) =  1.77

 

So would the correct bitrate be

 

50MBPS x 1.777 = 89 MBPS.

 

I know it doesn't really matter because the main reason I want to upscale is increased YT quality, and Youtube Only allows 24MBPS for 1440p60--- 12MBPS for 1080p60 ---, but I still like to have High Quality saves on my HDD. 

 

Is that math correct? BTW this is in Premiere Pro 2017. 

 

Remember this is Upscaling. So ~ 1.6 Million pixels will be artificial. Not sure if that matters...

 

Wouldnt how YT works even if you Upscale and saved it at 50MBps look better for some one playing the video back on YT? Since there able to get a higher bitrate by selecting 1440p

[Mira Yurizaki]

1 minute ago, BiscuitMassacre said:

I am using H.264. literally all I want is a bit rate that will make my 1080 video not lose any quality when scaled to 1440p.

You should be using a variable bit rate, at which point I'm sure the encoder is going to ask for a quality option.

 

If this 4K video sample I have is any indication, it goes up to 60Mbps.

[BiscuitMassacre]

3 minutes ago, michaelocarroll007 said:

Wouldnt how YT works even if you Upscale and saved it at 50MBps look better for some one playing the video back on YT? Since there able to get a higher bitrate by selecting 1440p

It would be in theory the 1440P would look worse on the actual save file.

[HunterAP]

According to this page from YouTube on recommended settings, 1080p60fps would need ~12Mbps while 1440p60fps would need ~24Mbps. Personally, I record at double the required bitrate (I record in 1440p60fps so I shoot for +48Mbps, usually 60Mbps), then render the video to target about 30Mbps in an attempt to make YouTube's compression less bad.

 

In your case, I'd recommend recording in a similar fashion, so for your case 50Mbps should be fine, but if notice jaggedness, blurriness, or pixelation after upscaling, then up the bitrate and keep testing the upscaled video.

 

The site I linked to also shows that going from 30fps to 60fps doesn't double the bitrate (AKA framerates don't scale bitrate linearly), but resolution does scale almost linearly (108p30fps is recommended for 8Mbps, while 2160p30fps which is 4x the resolution is recommended a minimum of 35Mbps and a "max" of 45Mbps).

 

You're better off over-shooting the bitrate required, edit you video and render it in 1440p with a target bitrate slightly higher than YT's suggestion and then upload it.

[AlTech]

On ‎2‎/‎11‎/‎2017 at 0:20 AM, tmcclelland455 said:

I tend to do 90Mbps for 1440p60, and it looks perfectly fine.

90MB/s?

 

Are you serious?

 

Don't you mean 9MB/s?

[flibberdipper]

4 minutes ago, AluminiumTech said:

90MB/s?

 

Are you serious?

 

Don't you mean 9MB/s?

Mbps = Megabits per second

 

90Mbps is something around 11.5MB/s.

[AlTech]

1 minute ago, tmcclelland455 said:

Mbps = Megabits per second

 

90Mbps is something around 11.5MB/s.

My issue is with the number 90.

 

There is no way you are recording 90Megabits per second.

 

Most people struggle to get 9 Megabits per second. I find it highly unusual that you are suggesting that you are using 90 Megabits per second.

 

YouTube officially states that for 1080p, only between 5 and 12 Megabits per second should be used.

[flibberdipper]

2 hours ago, AluminiumTech said:

My issue is with the number 90.

 

There is no way you are recording 90Megabits per second.

 

Most people struggle to get 9 Megabits per second. I find it highly unusual that you are suggesting that you are using 90 Megabits per second.

 

YouTube officially states that for 1080p, only between 5 and 12 Megabits per second should be used.

A banana with half a potato for RAM can do 9Mbps. FRAPS records in retardedly high bitrate and it doesn't totally destroy CPU. Literally everything I do, FRAPS can and will record at something like 700Mbps.

 

EDIT: Correction, it records at around 740Mbps.

 

[PlayStation 2]

3 minutes ago, tmcclelland455 said:

A banana with half a potato for RAM can do 9Mbps. FRAPS records in retardedly high bitrate and it doesn't totally destroy CPU. Literally everything I do, FRAPS will record at something like 700Mbps.

 

EDIT: Correction, it records at around 740Mbps. 

Fraps records uncompressed video, which is generally less intensive than recording compressed video. Makes no sense, yes, but that's just how it is. It's a lot more effort to spit out a compressed frame that looks damn near lossless than spitting out uncompressed frames.

[BiscuitMassacre]

3 hours ago, tmcclelland455 said:

Mbps = Megabits per second

 

90Mbps is something around 11.5MB/s.

I record at 50MBPS. Not 90. (6.25MB/s). I was talking about upping the MBPS to 90 to compensate for 1440P resolution.