#[non_exhaustive]pub enum H264GopSizeUnits {
Auto,
Frames,
Seconds,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against H264GopSizeUnits
, 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 h264gopsizeunits = unimplemented!();
match h264gopsizeunits {
H264GopSizeUnits::Auto => { /* ... */ },
H264GopSizeUnits::Frames => { /* ... */ },
H264GopSizeUnits::Seconds => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when h264gopsizeunits
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant H264GopSizeUnits::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
H264GopSizeUnits::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 H264GopSizeUnits::NewFeature
is defined.
Specifically, when h264gopsizeunits
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on H264GopSizeUnits::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. Specify how the transcoder determines GOP size for this output. We recommend that you have the transcoder automatically choose this value for you based on characteristics of your input video. To enable this automatic behavior, choose Auto and and leave GOP size blank. By default, if you don’t specify GOP mode control, MediaConvert will use automatic behavior. If your output group specifies HLS, DASH, or CMAF, set GOP mode control to Auto and leave GOP size blank in each output in your output group. To explicitly specify the GOP length, choose Specified, frames or Specified, seconds and then provide the GOP length in the related setting GOP size.
Variants (Non-exhaustive)§
This enum is marked as non-exhaustive
Auto
Frames
Seconds
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 H264GopSizeUnits
impl H264GopSizeUnits
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 H264GopSizeUnits
impl AsRef<str> for H264GopSizeUnits
source§impl Clone for H264GopSizeUnits
impl Clone for H264GopSizeUnits
source§fn clone(&self) -> H264GopSizeUnits
fn clone(&self) -> H264GopSizeUnits
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl Debug for H264GopSizeUnits
impl Debug for H264GopSizeUnits
source§impl Display for H264GopSizeUnits
impl Display for H264GopSizeUnits
source§impl From<&str> for H264GopSizeUnits
impl From<&str> for H264GopSizeUnits
source§impl FromStr for H264GopSizeUnits
impl FromStr for H264GopSizeUnits
source§impl Hash for H264GopSizeUnits
impl Hash for H264GopSizeUnits
source§impl Ord for H264GopSizeUnits
impl Ord for H264GopSizeUnits
source§fn cmp(&self, other: &H264GopSizeUnits) -> Ordering
fn cmp(&self, other: &H264GopSizeUnits) -> 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 H264GopSizeUnits
impl PartialEq for H264GopSizeUnits
source§fn eq(&self, other: &H264GopSizeUnits) -> bool
fn eq(&self, other: &H264GopSizeUnits) -> bool
self
and other
values to be equal, and is used
by ==
.source§impl PartialOrd for H264GopSizeUnits
impl PartialOrd for H264GopSizeUnits
source§fn partial_cmp(&self, other: &H264GopSizeUnits) -> Option<Ordering>
fn partial_cmp(&self, other: &H264GopSizeUnits) -> 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 H264GopSizeUnits
impl StructuralPartialEq for H264GopSizeUnits
Auto Trait Implementations§
impl Freeze for H264GopSizeUnits
impl RefUnwindSafe for H264GopSizeUnits
impl Send for H264GopSizeUnits
impl Sync for H264GopSizeUnits
impl Unpin for H264GopSizeUnits
impl UnwindSafe for H264GopSizeUnits
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