问题
I have three Sony Alpha 77M2 cameras, and I'm trying to take photos with all three simultaneously, and retrieve these photos. I can do the simultaneous shutter release using commercial remote triggers synced off a single transmitter, and I can control a single camera over USB using the Sony Remote Camera Control software - however this can't control more than one camera, and it won't let me run more than one instance on a single machine.
My question, therefore, is whether there is an API available for the USB remote control interface for these cameras? They don't support the WiFi API, so I can't use that (and WiFi isn't much use for the environment this system will be used in, due to the likelyhood of interference)
回答1:
This may be what you look for
http://sourceforge.net/p/gphoto/feature-requests/442/
This camera A77m2 has WiFi and supports some small subset of the API. You can download Sony play memories app for android or iOS and five it a try. Difficulty with WiFi is that cameras act as access points so connecting several to one computer is challenge.USB has API too but not public AFAIK. There is some effort to guess the USB interface here https://github.com/alech/alphamote
Here is link to the WiFi Api https://developer.sony.com/develop/cameras/
回答2:
It turned out that the camera supports enough of the PTP protocol for libgphoto to recognise it and retrieve the images in tethered mode - but not to control the shutter.
来源：https://stackoverflow.com/questions/28586156/sony-alpha-77m2-remote-control-over-usb