Hi there,
I want to use sendfile to send my images really fast over the network. The V4L2 driver supports a ioctl called VIDIOC_EXPBUF which exports a mmaped memory area as a fd, but sendfile does not work on this dmafd. read, write, seek returns with EINVAL.
- What is the proper way to get a filedescriptor from a memory region on V4L2? (memfd does not work)
- What needs to be changed on V4L2-capture driver or sendfile?
Thanks,
Frank
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