New GoPro 9 bitrate conundrum
Discussion
Hello All, I hope you can advise on this, I am a new starter for GoPro, though have used a bargain bucket Chinese action cam for the last few years.
I got the Gopro and after getting used to the settings etc did some different 30s videos at various resolutions, frame rates and wide and normal field of view. The resolutions were 1920x1080, 2704x1520, 3840x2160 and 5120x2880.
I would have expected the bit rates and the file sizes to jump up from each resolution so making a bigger file size. This seems to be the case from 1920x1080 to 2704x1520 but then the increase from then on has similar bit rates and same file sizes. Can anyone advise why this is so?
Here are the resolutions, bit rates and file sizes.
Just to note the top 4 are all 1080p but with 30 or 60fps and wide or normal angle, hence 4.
Bottom left are 2704x1520 which only allows 60fps on wide and normal.
Middle bottom is 3840x2160 at 30 and 60fps.
Right bottom is the 5120x2880 which the Gopro will only do at 30fps.
As you can see the amount of data has not got bigger after the initial jump from 1080p to 2704x5120 (2.7k). Wide angle or fps does not seem to have too much of a difference compared to a step up in number of pixels.
I have looked at all the files and cannot see any difference from 2704x2160 upwards ( I can from 1080p to 2704) but that might be due to my 2160x1600 monitor.
Any thoughts?
I got the Gopro and after getting used to the settings etc did some different 30s videos at various resolutions, frame rates and wide and normal field of view. The resolutions were 1920x1080, 2704x1520, 3840x2160 and 5120x2880.
I would have expected the bit rates and the file sizes to jump up from each resolution so making a bigger file size. This seems to be the case from 1920x1080 to 2704x1520 but then the increase from then on has similar bit rates and same file sizes. Can anyone advise why this is so?
Here are the resolutions, bit rates and file sizes.
Just to note the top 4 are all 1080p but with 30 or 60fps and wide or normal angle, hence 4.
Bottom left are 2704x1520 which only allows 60fps on wide and normal.
Middle bottom is 3840x2160 at 30 and 60fps.
Right bottom is the 5120x2880 which the Gopro will only do at 30fps.
As you can see the amount of data has not got bigger after the initial jump from 1080p to 2704x5120 (2.7k). Wide angle or fps does not seem to have too much of a difference compared to a step up in number of pixels.
I have looked at all the files and cannot see any difference from 2704x2160 upwards ( I can from 1080p to 2704) but that might be due to my 2160x1600 monitor.
Any thoughts?
Not really my department but I found this. Any use? https://havecamerawilltravel.com/gopro/gopro-hero9...
Thanks, that is very useful ... 
It doesn't answer my issue, on first glance, but gives me more to ponder over. for instance that table of max bit rates
Is not what I am seeing out of the box, it may just be a case of learning all the settings and suckit and see.
In the meantime I did a full charge to flat video to see whether the supplied 32GB micro SD card would fill up first or the battery discharge. The card filled up first, so they should be sending out a 64GB card, it is only £5-10 more.
Also they formatted it FAT32 so the max file size is only 4GB .... why do that when you can do NTFS or exFat ?
I am really impressed by the software and hardware so far but it is a rough gem rather than being polished. It took me 3 phones, all using Android 11 to get the phone synced to the GoPro, though of course that is perhaps a comment on the phones.
It doesn't answer my issue, on first glance, but gives me more to ponder over. for instance that table of max bit rates
Is not what I am seeing out of the box, it may just be a case of learning all the settings and suckit and see.
In the meantime I did a full charge to flat video to see whether the supplied 32GB micro SD card would fill up first or the battery discharge. The card filled up first, so they should be sending out a 64GB card, it is only £5-10 more.
Also they formatted it FAT32 so the max file size is only 4GB .... why do that when you can do NTFS or exFat ?
I am really impressed by the software and hardware so far but it is a rough gem rather than being polished. It took me 3 phones, all using Android 11 to get the phone synced to the GoPro, though of course that is perhaps a comment on the phones.
Gassing Station | Photography & Video | Top of Page | What's New | My Stuff