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Scott Stoness
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Newest R5II Rumours and Thoughts


biggles2002 wrote:
Scott Stoness wrote:
biggles2002 wrote:
Pre-capture mode on canon ....someone sad it uses the video lanes on sensor output thats why you have to extract the "photos/frames" from the "videostream" .....so therefor 12 bits and not 14


That is consistent with my testing of my r8 achieving 200 pictures before buffer is filled when light is good, so it sounds right. And it is consistent with the "one file / need to extract" iimplementation.

I suspect that there is some kind of internal video lane better than still lane physical connections [of video is more compressed], to get pre burst issue because the r8 in electronic (12bit, 40fps) still mode (60max) cannot get to 200 max pictures in good light, whereas pre burst can. [although its possible that they did not implement pre burst the same as electronic (both 12bit) because it created competition with r3.] Even R8 craw/12bit electronic only achieved 100 in burst so the video compression must be more compressed than stills.

Here is a good discussion of bit rate, multi frame compression, codec and all of which influences mb/s and file sizes.


It suggests to me that Canon r8 is using video for pre burst and uses a codec/settings that are more favourable (more lossy, 8bit ?, inter frame compression?, HEVC) setting for pre burst.



I've used my R5 to do 8k 30p video with fast shutterspeed (appropriate to photo situation) to capture birds taking off..... but in video the AF is too slow so pretty useless. hopefully the mark2 with stacked sensor is faster and can work in this senario


The R8 pre capture implementation canon notes suggest it might work

RAW images captured are saved in a single file (roll). These files have a .CR3 file extension.
Picture Style, white balance, and Auto Lighting Optimizer settings configured for the first shot also apply to the next shots.
The camera does not beep as you are shooting.
[Shooting: RAW burst mode] reverts to [Disable] when the power switch is set to Power off.

It does not say af is impaired




Jul 10, 2024 at 02:25 PM
Scott Stoness
Offline
Upload & Sell: On
Re: Newest R5II Rumours and Thoughts


biggles2002 wrote:
Scott Stoness wrote:
biggles2002 wrote:
Pre-capture mode on canon ....someone sad it uses the video lanes on sensor output thats why you have to extract the "photos/frames" from the "videostream" .....so therefor 12 bits and not 14


That is consistent with my testing of my r8 achieving 200 pictures before buffer is filled when light is good, so it sounds right. And it is consistent with the "one file / need to extract" iimplementation.

I suspect that there is some kind of internal video lane better than still lane physical connections [of video is more compressed], to get pre burst issue because the r8 in electronic (12bit, 40fps) still mode (60max) cannot get to 200 max pictures in good light, whereas pre burst can. [although its possible that they did not implement pre burst the same as electronic (both 12bit) because it created competition with r3.] Even R8 craw/12bit electronic only achieved 100 in burst so the video compression must be more compressed than stills.

Here is a good discussion of bit rate, multi frame compression, codec and all of which influences mb/s and file sizes.


It suggests to me that Canon r8 is using video for pre burst and uses a codec/settings that are more favourable (more lossy, 8bit ?, inter frame compression?, HEVC) setting for pre burst.



I've used my R5 to do 8k 30p video with fast shutterspeed (appropriate to photo situation) to capture birds taking off..... but in video the AF is too slow so pretty useless. hopefully the mark2 with stacked sensor is faster and can work in this senario


The R8 implementation canon notes suggest it might work

RAW images captured are saved in a single file (roll). These files have a .CR3 file extension.
Picture Style, white balance, and Auto Lighting Optimizer settings configured for the first shot also apply to the next shots.
The camera does not beep as you are shooting.
[Shooting: RAW burst mode] reverts to [Disable] when the power switch is set to Power off.

It does not say af is impaired




Jul 10, 2024 at 01:35 PM





  Previous versions of Scott Stoness's message #16591132 « Newest R5II Rumours and Thoughts »

 




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