Struct linuxvideo::VideoCaptureDevice

pub struct VideoCaptureDevice { /* private fields */ }

A video device configured for video capture.

Implementations

impl VideoCaptureDevice

pub fn format(&self) -> &PixFormat

Returns the pixel format the driver chose for capturing.

This may (and usually will) differ from the format passed to Device::video_capture.

pub fn set_frame_interval(&self, interval: Fract) -> Result<Fract>

Requests a change to the frame interval.

Returns the actual frame interval chosen by the driver.

Supported frame intervals depend on the pixel format and video resolution and can be enumerated with Device::frame_intervals.

pub fn into_stream(self, buffer_count: u32) -> Result<ReadStream>

Initializes streaming I/O mode with the given number of buffers.

Note that some drivers may fail to allocate even low buffer counts. For example v4l2loopback seems to be limited to 2 buffers.

Trait Implementations

impl Read for VideoCaptureDevice

Performs a direct read() from the video device.

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.

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

Pull some bytes from this source into the specified buffer, returning how many bytes were read.

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

Like read, except that it reads into a slice of buffers.

fn is_read_vectored(&self) -> bool

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

Determines if this Reader has an efficient read_vectored implementation.

fn read_to_end(&mut self, buf: &mut Vec<u8, Global>) -> Result<usize, Error>

Read all bytes until EOF in this source, placing them into buf.

fn read_to_string(&mut self, buf: &mut String) -> Result<usize, Error>

Read all bytes until EOF in this source, appending them to buf.

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

Read the exact number of bytes required to fill buf.

fn read_buf(&mut self, buf: BorrowedCursor<'_>) -> Result<(), Error>

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

Pull some bytes from this source into the specified buffer.

fn read_buf_exact(&mut self, cursor: BorrowedCursor<'_>) -> Result<(), Error>

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

Read the exact number of bytes required to fill cursor.

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

Creates a “by reference” adaptor for this instance of Read.

fn bytes(self) -> Bytes<Self>

Transforms this Read instance to an Iterator over its bytes.

fn chain<R>(self, next: R) -> Chain<Self, R>where
    R: Read,

Creates an adapter which will chain this stream with another.

fn take(self, limit: u64) -> Take<Self>

Creates an adapter which will read at most limit bytes from it.