We've been fiddling with CHDK and CHDKPTP, but we can't find a way to get the shooting and transferring to happen concurrently. We haven't found a way to monitor the non-USB trigger on the G15 through a script, and it seems we can't monitor the USB 5V trigger and do USB data transfer at the same time.
The shooting needs to be triggered from either the USB 5V trigger, or the separate remote trigger on the G15. Basically we can't trigger it from the computer connected by USB (but we can initiate picture transfer from the computer if needed). As a last resort we can have the camera triggering itself at an interval, but we'd like to avoid that.
The shooting triggers will be between 500-1000ms apart (possibly inconsistent) and the camera needs to be fairly responsive to the triggers (something like 50 ms delay is fine).
The USB transfer will be slower than normal, so it's almost guaranteed there will be a backlog of pictures waiting to transfer.
The pictures have to be taken consistently, so we can't alternate between shooting and transferring.
We haven't found a way to monitor the non-USB trigger on the G15 through a script
and it seems we can't monitor the USB 5V trigger and do USB data transfer at the same time.
Our main issue now is the intervals between triggering shots. We don't need 500 ms now, but under 2s is a necessity. I've been messing with autofocus and shutter speeds, but I'm not really sure how to reduce the time it takes to shoot. I'm not an expert on cameras, but I don't see why we can't get functionality close to continuous shooting mode. Right now it's a bit inconsistent, but it ranges from 1-3 seconds between shots. Any ideas on how to get fast and responsive triggering?
Any ideas on how to get fast and responsive triggering?
Almost started a new thread for what I want, but maybe it fits in here. I have the idea that maybe one could get this thing to work with CHDK-cameras: SD-Card with inbuilt USB in conjunction with a sd card extension cable
Now I suppose that only one of each feature - usb or sd - could be used at the same time. So my question is: Is there any chance to completely disable the cameras access to the SD card, so one could then use the USB-feature to download/upload files to the card and afterwards enable the sd-card for the camera again?
// Turn OFF SD Card power// to support autostartLDR R3, =0xC0220018 // @FF86E8DC S90MOV R2, #0x44STR R2, [R3]
My idea is that maybe one could download from multiple cameras at the same time, because the cards could be mapped as drives. This would be in contrast to use PTP, which - as far as I understood - only allows to download from the cameras one after one. Is that right? What do you think? Is this an idea or is it a dead end?
I did not mean the extension cable to be plugged into the computer, but directly into the camera. On the other end, the slot side, I would put the Sandisk card, so one could have the USB-cable on that which then goes into the PC.
The cards aren't old, I suppose they don't have so much data space on them because they have to be both speedy and have two different controllers on them.
Now as you already know I am no inside CHDK-coder. Could you give me a hint how to encapsulate such "SD Card on/off funtionality" into functions and make them usable in CHDK? I'll take the risk to try with one of my cams...
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