#[non_exhaustive]pub enum H264TemporalAdaptiveQuantization {
Disabled,
Enabled,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against H264TemporalAdaptiveQuantization
, 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 h264temporaladaptivequantization = unimplemented!();
match h264temporaladaptivequantization {
H264TemporalAdaptiveQuantization::Disabled => { /* ... */ },
H264TemporalAdaptiveQuantization::Enabled => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when h264temporaladaptivequantization
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant H264TemporalAdaptiveQuantization::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
H264TemporalAdaptiveQuantization::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 H264TemporalAdaptiveQuantization::NewFeature
is defined.
Specifically, when h264temporaladaptivequantization
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on H264TemporalAdaptiveQuantization::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. Only use this setting when you change the default value, AUTO, for the setting H264AdaptiveQuantization. When you keep all defaults, excluding H264AdaptiveQuantization and all other adaptive quantization from your JSON job specification, MediaConvert automatically applies the best types of quantization for your video content. When you set H264AdaptiveQuantization to a value other than AUTO, the default value for H264TemporalAdaptiveQuantization is Enabled. Keep this default value to adjust quantization within each frame based on temporal variation of content complexity. When you enable this feature, the encoder uses fewer bits on areas of the frame that aren’t moving and uses more bits on complex objects with sharp edges that move a lot. For example, this feature improves the readability of text tickers on newscasts and scoreboards on sports matches. Enabling this feature will almost always improve your video quality. Note, though, that this feature doesn’t take into account where the viewer’s attention is likely to be. If viewers are likely to be focusing their attention on a part of the screen that doesn’t have moving objects with sharp edges, such as sports athletes’ faces, you might choose to set H264TemporalAdaptiveQuantization to Disabled. Related setting: When you enable temporal quantization, adjust the strength of the filter with the setting Adaptive quantization. To manually enable or disable H264TemporalAdaptiveQuantization, you must set Adaptive quantization to a value other than AUTO.
Variants (Non-exhaustive)§
This enum is marked as non-exhaustive
Disabled
Enabled
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 H264TemporalAdaptiveQuantization
impl H264TemporalAdaptiveQuantization
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 H264TemporalAdaptiveQuantization
impl AsRef<str> for H264TemporalAdaptiveQuantization
source§impl Clone for H264TemporalAdaptiveQuantization
impl Clone for H264TemporalAdaptiveQuantization
source§fn clone(&self) -> H264TemporalAdaptiveQuantization
fn clone(&self) -> H264TemporalAdaptiveQuantization
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 H264TemporalAdaptiveQuantization
impl From<&str> for H264TemporalAdaptiveQuantization
source§impl Ord for H264TemporalAdaptiveQuantization
impl Ord for H264TemporalAdaptiveQuantization
source§fn cmp(&self, other: &H264TemporalAdaptiveQuantization) -> Ordering
fn cmp(&self, other: &H264TemporalAdaptiveQuantization) -> 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 H264TemporalAdaptiveQuantization
impl PartialEq for H264TemporalAdaptiveQuantization
source§fn eq(&self, other: &H264TemporalAdaptiveQuantization) -> bool
fn eq(&self, other: &H264TemporalAdaptiveQuantization) -> bool
self
and other
values to be equal, and is used
by ==
.source§impl PartialOrd for H264TemporalAdaptiveQuantization
impl PartialOrd for H264TemporalAdaptiveQuantization
source§fn partial_cmp(
&self,
other: &H264TemporalAdaptiveQuantization
) -> Option<Ordering>
fn partial_cmp( &self, other: &H264TemporalAdaptiveQuantization ) -> 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 H264TemporalAdaptiveQuantization
impl StructuralPartialEq for H264TemporalAdaptiveQuantization
Auto Trait Implementations§
impl Freeze for H264TemporalAdaptiveQuantization
impl RefUnwindSafe for H264TemporalAdaptiveQuantization
impl Send for H264TemporalAdaptiveQuantization
impl Sync for H264TemporalAdaptiveQuantization
impl Unpin for H264TemporalAdaptiveQuantization
impl UnwindSafe for H264TemporalAdaptiveQuantization
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