Enum FindDevicesError 

#[non_exhaustive]
pub enum FindDevicesError {
    AVCaptureDeviceNotFound,
    MediaTypeSupported(i32),
    OsNotSupported,
    UTF8Error,
    OutOfMemory,
    InvalidArgument,
    NotFound,
    IOError,
    OperationNotPermitted,
    PermissionDenied,
    NotImplemented,
    BadFileDescriptor,
    UnknownError(i32),
}

Errors from enumerating capture devices (cameras, microphones, screens).

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

AVCaptureDeviceNotFound

Returned on macOS when the AVCaptureDevice class is not available.

MediaTypeSupported(i32)

Returned when device enumeration for the requested media type is not supported; the payload is the raw AVMediaType value.

OsNotSupported

Returned when device enumeration is not supported on the current operating system.

UTF8Error

Returned when a device description could not be converted to a UTF-8 string.

OutOfMemory

Memory allocation failed (AVERROR(ENOMEM)).

InvalidArgument

FFmpeg rejected an argument as invalid (AVERROR(EINVAL)).

NotFound

The device or stream does not exist (AVERROR(ENOENT)).

IOError

A low-level I/O error occurred (AVERROR(EIO)).

OperationNotPermitted

The operation was not permitted (AVERROR(EPERM)).

PermissionDenied

Permission was denied (AVERROR(EACCES)).

NotImplemented

The functionality is not supported by the linked FFmpeg build (AVERROR(ENOSYS)).

BadFileDescriptor

An invalid file descriptor was used (AVERROR(EBADF)).

UnknownError(i32)

Any other failure; the payload is the raw FFmpeg error code (rendered with av_err2str in the message).

Trait Implementations

impl Debug for FindDevicesError

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for FindDevicesError

fn fmt(&self, __formatter: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Error for FindDevicesError

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

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

Provides type-based access to context intended for error reports.

impl From<FindDevicesError> for Error

fn from(source: FindDevicesError) -> Self

Converts to this type from the input type.

impl From<i32> for FindDevicesError

fn from(err_code: i32) -> Self

Converts to this type from the input type.