#[non_exhaustive]pub enum Mpeg2FramerateConversionAlgorithm {
DuplicateDrop,
Frameformer,
Interpolate,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against Mpeg2FramerateConversionAlgorithm
, 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 mpeg2framerateconversionalgorithm = unimplemented!();
match mpeg2framerateconversionalgorithm {
Mpeg2FramerateConversionAlgorithm::DuplicateDrop => { /* ... */ },
Mpeg2FramerateConversionAlgorithm::Frameformer => { /* ... */ },
Mpeg2FramerateConversionAlgorithm::Interpolate => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when mpeg2framerateconversionalgorithm
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant Mpeg2FramerateConversionAlgorithm::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
Mpeg2FramerateConversionAlgorithm::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 Mpeg2FramerateConversionAlgorithm::NewFeature
is defined.
Specifically, when mpeg2framerateconversionalgorithm
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on Mpeg2FramerateConversionAlgorithm::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. Choose the method that you want MediaConvert to use when increasing or decreasing the frame rate. For numerically simple conversions, such as 60 fps to 30 fps: We recommend that you keep the default value, Drop duplicate. For numerically complex conversions, to avoid stutter: Choose Interpolate. This results in a smooth picture, but might introduce undesirable video artifacts. For complex frame rate conversions, especially if your source video has already been converted from its original cadence: Choose FrameFormer to do motion-compensated interpolation. FrameFormer uses the best conversion method frame by frame. Note that using FrameFormer increases the transcoding time and incurs a significant add-on cost. When you choose FrameFormer, your input video resolution must be at least 128x96.
Variants (Non-exhaustive)§
This enum is marked as non-exhaustive
DuplicateDrop
Frameformer
Interpolate
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 Mpeg2FramerateConversionAlgorithm
impl Mpeg2FramerateConversionAlgorithm
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 Mpeg2FramerateConversionAlgorithm
impl AsRef<str> for Mpeg2FramerateConversionAlgorithm
source§impl Clone for Mpeg2FramerateConversionAlgorithm
impl Clone for Mpeg2FramerateConversionAlgorithm
source§fn clone(&self) -> Mpeg2FramerateConversionAlgorithm
fn clone(&self) -> Mpeg2FramerateConversionAlgorithm
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl From<&str> for Mpeg2FramerateConversionAlgorithm
impl From<&str> for Mpeg2FramerateConversionAlgorithm
source§impl Ord for Mpeg2FramerateConversionAlgorithm
impl Ord for Mpeg2FramerateConversionAlgorithm
source§fn cmp(&self, other: &Mpeg2FramerateConversionAlgorithm) -> Ordering
fn cmp(&self, other: &Mpeg2FramerateConversionAlgorithm) -> 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 Mpeg2FramerateConversionAlgorithm
impl PartialEq for Mpeg2FramerateConversionAlgorithm
source§fn eq(&self, other: &Mpeg2FramerateConversionAlgorithm) -> bool
fn eq(&self, other: &Mpeg2FramerateConversionAlgorithm) -> bool
self
and other
values to be equal, and is used
by ==
.source§impl PartialOrd for Mpeg2FramerateConversionAlgorithm
impl PartialOrd for Mpeg2FramerateConversionAlgorithm
source§fn partial_cmp(
&self,
other: &Mpeg2FramerateConversionAlgorithm
) -> Option<Ordering>
fn partial_cmp( &self, other: &Mpeg2FramerateConversionAlgorithm ) -> 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 Mpeg2FramerateConversionAlgorithm
impl StructuralPartialEq for Mpeg2FramerateConversionAlgorithm
Auto Trait Implementations§
impl Freeze for Mpeg2FramerateConversionAlgorithm
impl RefUnwindSafe for Mpeg2FramerateConversionAlgorithm
impl Send for Mpeg2FramerateConversionAlgorithm
impl Sync for Mpeg2FramerateConversionAlgorithm
impl Unpin for Mpeg2FramerateConversionAlgorithm
impl UnwindSafe for Mpeg2FramerateConversionAlgorithm
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