Enum aws_sdk_mediaconvert::types::Mpeg2Telecine
source · #[non_exhaustive]pub enum Mpeg2Telecine {
Hard,
None,
Soft,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against Mpeg2Telecine
, it is important to ensure
your code is forward-compatible. That is, if a match arm handles a case for a
feature that is supported by the service but has not been represented as an enum
variant in a current version of SDK, your code should continue to work when you
upgrade SDK to a future version in which the enum does include a variant for that
feature.
Here is an example of how you can make a match expression forward-compatible:
# let mpeg2telecine = unimplemented!();
match mpeg2telecine {
Mpeg2Telecine::Hard => { /* ... */ },
Mpeg2Telecine::None => { /* ... */ },
Mpeg2Telecine::Soft => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when mpeg2telecine
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant Mpeg2Telecine::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
Mpeg2Telecine::Unknown(UnknownVariantValue("NewFeature".to_owned()))
and calling as_str
on it yields "NewFeature"
.
This match expression is forward-compatible when executed with a newer
version of SDK where the variant Mpeg2Telecine::NewFeature
is defined.
Specifically, when mpeg2telecine
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on Mpeg2Telecine::NewFeature
also yielding "NewFeature"
.
Explicitly matching on the Unknown
variant should
be avoided for two reasons:
- The inner data
UnknownVariantValue
is opaque, and no further information can be extracted. - It might inadvertently shadow other intended match arms. When you do frame rate conversion from 23.976 frames per second (fps) to 29.97 fps, and your output scan type is interlaced, you can optionally enable hard or soft telecine to create a smoother picture. Hard telecine produces a 29.97i output. Soft telecine produces an output with a 23.976 output that signals to the video player device to do the conversion during play back. When you keep the default value, None, MediaConvert does a standard frame rate conversion to 29.97 without doing anything with the field polarity to create a smoother picture.
Variants (Non-exhaustive)§
This enum is marked as non-exhaustive
Hard
None
Soft
Unknown(UnknownVariantValue)
Unknown
. See the docs on this enum for the correct way to handle unknown variants.Unknown
contains new variants that have been added since this code was generated.
Implementations§
source§impl Mpeg2Telecine
impl Mpeg2Telecine
source§impl Mpeg2Telecine
impl Mpeg2Telecine
sourcepub fn try_parse(value: &str) -> Result<Self, UnknownVariantError>
pub fn try_parse(value: &str) -> Result<Self, UnknownVariantError>
Parses the enum value while disallowing unknown variants.
Unknown variants will result in an error.
Trait Implementations§
source§impl AsRef<str> for Mpeg2Telecine
impl AsRef<str> for Mpeg2Telecine
source§impl Clone for Mpeg2Telecine
impl Clone for Mpeg2Telecine
source§fn clone(&self) -> Mpeg2Telecine
fn clone(&self) -> Mpeg2Telecine
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl Debug for Mpeg2Telecine
impl Debug for Mpeg2Telecine
source§impl Display for Mpeg2Telecine
impl Display for Mpeg2Telecine
source§impl From<&str> for Mpeg2Telecine
impl From<&str> for Mpeg2Telecine
source§impl FromStr for Mpeg2Telecine
impl FromStr for Mpeg2Telecine
source§impl Hash for Mpeg2Telecine
impl Hash for Mpeg2Telecine
source§impl Ord for Mpeg2Telecine
impl Ord for Mpeg2Telecine
source§fn cmp(&self, other: &Mpeg2Telecine) -> Ordering
fn cmp(&self, other: &Mpeg2Telecine) -> Ordering
1.21.0 · source§fn max(self, other: Self) -> Selfwhere
Self: Sized,
fn max(self, other: Self) -> Selfwhere
Self: Sized,
source§impl PartialEq for Mpeg2Telecine
impl PartialEq for Mpeg2Telecine
source§fn eq(&self, other: &Mpeg2Telecine) -> bool
fn eq(&self, other: &Mpeg2Telecine) -> bool
self
and other
values to be equal, and is used
by ==
.source§impl PartialOrd for Mpeg2Telecine
impl PartialOrd for Mpeg2Telecine
source§fn partial_cmp(&self, other: &Mpeg2Telecine) -> Option<Ordering>
fn partial_cmp(&self, other: &Mpeg2Telecine) -> Option<Ordering>
1.0.0 · source§fn le(&self, other: &Rhs) -> bool
fn le(&self, other: &Rhs) -> bool
self
and other
) and is used by the <=
operator. Read moreimpl Eq for Mpeg2Telecine
impl StructuralPartialEq for Mpeg2Telecine
Auto Trait Implementations§
impl Freeze for Mpeg2Telecine
impl RefUnwindSafe for Mpeg2Telecine
impl Send for Mpeg2Telecine
impl Sync for Mpeg2Telecine
impl Unpin for Mpeg2Telecine
impl UnwindSafe for Mpeg2Telecine
Blanket Implementations§
source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
source§impl<Q, K> Comparable<K> for Q
impl<Q, K> Comparable<K> for Q
source§impl<Q, K> Equivalent<K> for Q
impl<Q, K> Equivalent<K> for Q
source§impl<Q, K> Equivalent<K> for Q
impl<Q, K> Equivalent<K> for Q
source§fn equivalent(&self, key: &K) -> bool
fn equivalent(&self, key: &K) -> bool
key
and return true
if they are equal.source§impl<T> Instrument for T
impl<T> Instrument for T
source§fn instrument(self, span: Span) -> Instrumented<Self>
fn instrument(self, span: Span) -> Instrumented<Self>
source§fn in_current_span(self) -> Instrumented<Self>
fn in_current_span(self) -> Instrumented<Self>
source§impl<T> IntoEither for T
impl<T> IntoEither for T
source§fn into_either(self, into_left: bool) -> Either<Self, Self>
fn into_either(self, into_left: bool) -> Either<Self, Self>
self
into a Left
variant of Either<Self, Self>
if into_left
is true
.
Converts self
into a Right
variant of Either<Self, Self>
otherwise. Read moresource§fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
self
into a Left
variant of Either<Self, Self>
if into_left(&self)
returns true
.
Converts self
into a Right
variant of Either<Self, Self>
otherwise. Read more