1080p @ 60 vs 2k @ 30

[caleb1]

Newbie question.

Would anyone know if 2k video at 30 fps would use the same storage space as 1080P at 60 fps?  Or more

That would make sense to me, double resolution but half the frames.....

 

Thanks

 

[Kilrah]

You can make either take the space you want as that's determined by the bitrate you choose.

[Brian McKee]

It's not only the bitrate itself to consider it's also the codec as well. A camera that uses Motion JPEG for example can have a much higher filesize than equivalent quality h.264 for example.

[Kilrah]

It IS only the bitrate that defines the size. Now yes depending on codec to get the same visual quality the required bitrate, and hence filesize will be different. 

[Brian McKee]

12 minutes ago, Kilrah said:

It IS only the bitrate that defines the size. Now yes depending on codec to get the same visual quality the required bitrate, and hence filesize will be different. 

Don't believe I suggested otherwise, just a thing to consider since some cameras offer multiple codec options.

[caleb1]

On 10/11/2021 at 10:41 AM, Kilrah said:

You can make either take the space you want as that's determined by the bitrate you choose.

 

On 10/12/2021 at 1:27 AM, Brian McKee said:

It's not only the bitrate itself to consider it's also the codec as well. A camera that uses Motion JPEG for example can have a much higher filesize than equivalent quality h.264 for example.

Thanks for the responses everyone.  Good to know about bitrates, differences in cameras, etc.

But assuming nothing is changed except for the resolution and FPS, should both aforementioned options consume the same space?

 

Thanks.

Edited October 14, 2021 by caleb1

[Brian McKee]

57 minutes ago, caleb1 said:

 

Thanks for the responses everyone.  Good to know about bitrates, differences in cameras, etc.

But assuming nothing is changed except for the resolution and FPS, should both aforementioned options consume the same space?

 

Thanks.

Assuming the camera itself does not change bitrates in the background, yes. You will use half the data (theoretically, probably not exactly) using 30 over 60.

[Kilrah]

As long as the bitrate is identical they'll take the same space.

[caleb1]

2 hours ago, Brian McKee said:

Assuming the camera itself does not change bitrates in the background, yes. You will use half the data (theoretically, probably not exactly) using 30 over 60.

 

2 hours ago, Kilrah said:

As long as the bitrate is identical they'll take the same space.

This answers my question, thanks guys!

[Electronics Wizardy]

Also 2k is basically the same as 1080p. 2k is 2160x1080, and 1080p is 1920x1080, its not many more pixels, you woudln't have to drop to 30fps to use 2k video.

[Kilrah]

Some people use "2K" to mean 1440p for some reason...

[GDRRiley]

14 hours ago, Kilrah said:

Some people use "2K" to mean 1440p for some reason...

that would be 2.5K/2.6K
2k is 1080p

[caleb1]

On 10/15/2021 at 3:49 AM, Kilrah said:

Some people use "2K" to mean 1440p for some reason...

 

21 hours ago, GDRRiley said:

that would be 2.5K/2.6K
2k is 1080p

My camera shows the resolution option as "2k" but I believe it means 1440p (2.5k/2.6k)

[GDRRiley]

5 minutes ago, caleb1 said:

 

My camera shows the resolution option as "2k" but I believe it means 1440p (2.5k/2.6k)

does it say DCI 2k? thats 17x9 2048 × 1080

[Electronics Wizardy]

3 hours ago, caleb1 said:

 

My camera shows the resolution option as "2k" but I believe it means 1440p (2.5k/2.6k)

What camera?

Most cameras list the bitrte for different settings. The bitrate is what determines the filesize, not the resolution or fame rates. For exmple some cameras do 4k30 at 50mbit and some cameras record the same res and frame raate at 1200mbit, a 24x range

[caleb1]

On 10/16/2021 at 4:05 PM, GDRRiley said:

does it say DCI 2k? thats 17x9 2048 × 1080

It does not say DCI.

 

On 10/16/2021 at 7:49 PM, Electronics Wizardy said:

What camera?

Most cameras list the bitrte for different settings. The bitrate is what determines the filesize, not the resolution or fame rates. For exmple some cameras do 4k30 at 50mbit and some cameras record the same res and frame raate at 1200mbit, a 24x range

Its an SJ Cam SJ6 Legend. It does not list bitrate in the resolution selection menu, but I can probably find it in the manual.

[GDRRiley]

3 minutes ago, caleb1 said:

It does not say DCI

2K @ 30fps 2560*1440.
should be 2.5 or 2.6k not 2k

[Electronics Wizardy]

2 hours ago, caleb1 said:

It does not say DCI.

 

Its an SJ Cam SJ6 Legend. It does not list bitrate in the resolution selection menu, but I can probably find it in the manual.

Why not test the bitrte your self? You can  record in both settings, and find the bitrate in a player like vlc.e

[caleb1]

On 10/19/2021 at 6:07 PM, Electronics Wizardy said:

Why not test the bitrte your self? You can  record in both settings, and find the bitrate in a player like vlc.e

Yeah that's probably what I will do.