I need to do some processing synchronized with an incoming video stream at the
frame rate (extracting Closed Captioning data from the Video Receiver chip). Any
suggestions about how to do this? We have our own camera driver, but this really
just creates the necessary config structures and adds the v4l2 device. The CSI
input is all handled behind the scenes. Are there any callback options that will
be called per frame?
If it were possible to interrupt on a GPIO line it might be possible to add the
support on the board to do this, but I didn’t see any posts on the forum about how
to do this.
The userspace option is to add a GStreamer element that triggers the reads every
time a frame goes through, but I’d rather have the timing more tightly coupled.
Any other options?
Thanks in Advance