Struct VideoOutputDevice 

pub struct VideoOutputDevice { /* private fields */ }

A video device configured for video output.

Returned by Device::video_output.

Implementations

impl VideoOutputDevice

pub fn format(&self) -> &PixFormat

Returns the video format chosen by the driver.

pub fn into_stream(self) -> Result<WriteStream>

Initializes streaming I/O mode.

Trait Implementations

impl AsFd for VideoOutputDevice

fn as_fd(&self) -> BorrowedFd<'_>

Borrows the file descriptor.

impl AsRawFd for VideoOutputDevice

fn as_raw_fd(&self) -> RawFd

Extracts the raw file descriptor.

impl Write for VideoOutputDevice

Performs a direct write() on the video device file, writing a video frame to it.

This will only succeed if the device advertises the READWRITE capability, otherwise an error will be returned and you have to use the streaming API instead.

Note that some applications, like guvcview, do not support the read/write methods, so using this on a v4l2loopback device will not work with such applications.

fn write(&mut self, buf: &[u8]) -> Result<usize>

Writes a buffer into this writer, returning how many bytes were written.

fn flush(&mut self) -> Result<()>

Flushes this output stream, ensuring that all intermediately buffered contents reach their destination.

fn write_vectored(&mut self, bufs: &[IoSlice<'_>]) -> Result<usize, Error>

Like write, except that it writes from a slice of buffers.

fn is_write_vectored(&self) -> bool

🔬This is a nightly-only experimental API. (can_vector)

Determines if this Writer has an efficient write_vectored implementation.

fn write_all(&mut self, buf: &[u8]) -> Result<(), Error>

Attempts to write an entire buffer into this writer.

fn write_all_vectored(&mut self, bufs: &mut [IoSlice<'_>]) -> Result<(), Error>

🔬This is a nightly-only experimental API. (write_all_vectored)

Attempts to write multiple buffers into this writer.

fn write_fmt(&mut self, args: Arguments<'_>) -> Result<(), Error>

Writes a formatted string into this writer, returning any error encountered.

fn by_ref(&mut self) -> &mut Self

where Self: Sized,

Creates a “by reference” adapter for this instance of Write.