c++cvideoedsdkcanon-sdk

Canon SDK (EDSDK) capture region of specified size for video stream


I am very new to the EDSDK so sorry for maybe weird question in some places.

Is it possible to access a video stream and perform some operations on it using the SDK? I need this to capture very thin region (ROI) of a specified size (for example 3840x10 px) for each frame in the stream. Don`t understand this as compression of a frame, aspect ratios are not needed to follow. These changes in theory should increase fps, because the region will be very thin (Should they?).

I found the code snippet below from the official documentation, although it seems this causes only to send a signal for starting and stopping video rec, without accessing the stream.

EdsUInt32 record_start = 4; // Begin movie shooting
err = EdsSetPropertyData(cameraRef, kEdsPropID_Record, 0, sizeof(record_start), &record_start);
EdsUInt32 record_stop = 0; // End movie shooting
err = EdsSetPropertyData(cameraRef, kEdsPropID_Record, 0, sizeof(record_stop), &record_stop);

I would be very thanksful for any suggestions and help. Please feel free to ask any additional information!


Solution

  • This sdk doesnt allow you to directly get access to hi res streams like industrial cams would. You can access over USB ~960x640 liveview images in sequential JPGs. Movie recording can only be done to internal card, and after stopping transfering the result. Outside of this SDk, use of an external HDMI recorder gives access to a near realtime feed at max FullHD1080p, depending on model and not always “clean”.