Question What's the size of 1h video?

[fastshot]

I don't know if this is the most proper place to ask my request because it deals with my video camera and not with a digital camera, anyway please mods move this in the case

I've got a video camera and it can record videos at 2 resolutions: 1280x720 and 1920x1080 and I'd like to know what's the size (MB/GB) of 1h of video recorded at each one of these resolutions. My goal is to buy a proper sized micro SD, I mean I want to get the smallest one which can contain 1h video file(s), in other words I don't want to waste my money buying the largest SD my device can fit in (32GB) to be sure of that.
I've recorded several "small" videos -I mean just a couple of minutes- due to the fact I've got only one small SD and I guessed I could calculate the size of 1h video on a proportional base but my main doubt/problem is the bitrates differs a bit though the resolution is the same therefore I've got final results (1h size) between a too wide range.

Here're some metadata taken both from file properties and from "g-spot" sw about 720p videos (note: sorry for my bad english translation):
file #1

1280x720 - 2.46' - 344 MB (352,352 KB / 360,808,448 bytes)
video
data rate 17111kbps
total data rate 17367kbps
audio
rate 256kbps

- g-spot
opendml (avi v2.0)
video 338mb (98.47%)
audio 5.04mb (1.47mb)
avi overhead 216kb (0.06%)
len. 2.46.198
frms 4986
kbps 17102
qf 0.619
pic 1280x720; sar 1.778 (16:9): par 1.000 (1:1); dar 1.778 (16:9)

files #2, #3 (only what differs from the above data)

1280x720 - 3.24' - 361mb
video
data rate 14613kbps
total data rate 14869kbps

1280x720 - 27" - 53.4mb
video
data rate 15976kbps
total data rate 16232kbps

As said and you can see bitrates differs therefore I've got different theoretical sizes about 1h video, I ask if it's possible a more precise result and how.
If you need more data please tell me what and how to get them.
Thanks in advance.

 

[SkyNetRising]

Simple math.
Total data rate 17367kbps - kbits per second
17367/8 = 2170.875 kbytes per second
2170.875/1024=2.12 mbytes per second
2.12 * 60 * 60 =7632 mbytes per hour
7632/1024= 7.45 gbytes per hour

 

[kanewolf]

I don't know if this is the most proper place to ask my request because it deals with my video camera and not with a digital camera, anyway please mods move this in the case

I've got a video camera and it can record videos at 2 resolutions: 1280x720 and 1920x1080 and I'd like to know what's the size (MB/GB) of 1h of video recorded at each one of these resolutions. My goal is to buy a proper sized micro SD, I mean I want to get the smallest one which can contain 1h video file(s), in other words I don't want to waste my money buying the largest SD my device can fit in (32GB) to be sure of that.
I've recorded several "small" videos -I mean just a couple of minutes- due to the fact I've got only one small SD and I guessed I could calculate the size of 1h video on a proportional base but my main doubt/problem is the bitrates differs a bit though the resolution is the same therefore I've got final results (1h size) between a too wide range.

Here're some metadata taken both from file properties and from "g-spot" sw about 720p videos (note: sorry for my bad english translation):
file #1

1280x720 - 2.46' - 344 MB (352,352 KB / 360,808,448 bytes)
video
data rate 17111kbps
total data rate 17367kbps
audio
rate 256kbps

- g-spot
opendml (avi v2.0)
video 338mb (98.47%)
audio 5.04mb (1.47mb)
avi overhead 216kb (0.06%)
len. 2.46.198
frms 4986
kbps 17102
qf 0.619
pic 1280x720; sar 1.778 (16:9): par 1.000 (1:1); dar 1.778 (16:9)

files #2, #3 (only what differs from the above data)

1280x720 - 3.24' - 361mb
video
data rate 14613kbps
total data rate 14869kbps

1280x720 - 27" - 53.4mb
video
data rate 15976kbps
total data rate 16232kbps

As said and you can see bitrates differs therefore I've got different theoretical sizes about 1h video, I ask if it's possible a more precise result and how.
If you need more data please tell me what and how to get them.
Thanks in advance.

What is the difference in price between a 16GB and 32GB? My guess is not very much. A 16GB SanDisk is $6 on Amazon, and a 32GB is $10. I would buy the largest your device supports.
File size depends on the compression, the visual content, motion, lots of variables. It is difficult ot predict.

 

[fastshot]

Thanks for your replies both theoretically ("File size depends on...") and practically ("7.45 gbytes per hour"). Another matter I forgot to tell about deals with the device battery itself because I can't test it because I've no such a big SD card so I don't know how much time it lasts. It's a 850mAh battery and the device can record 5.5h max BUT it's a very cheap chinese camera (about 10USD including shipping) and I don't trust the manual of course. Due to these reasons I don't want to waste my money in a 5.5h/32GB SD if the battery will last only 1h or less.

I've an idea anyway. I could buy a "good" 32GB sd IF I can use it for storage anyhow, I mean I could buy an USB micro sd card reader and put it in when I don't use the camera. In this case I can evaluate a 32gb sd sandisk or kingston (quite common and cheap brands on my local amazon) but I ask you suggestion for a "good" reader, I mean if I get a 100mb/s kingston micro sd then I'd like a reader that doesn't slow its theoretical speed too much and for a good price if it's possible.
EG. (both <10 euros)

1. Transcend USB 3.1 Gen 1 TS-RDF5K
2. SanDisk MobileMate USB 3.0

What can you suggest me?