#[non_exhaustive]pub enum MpdAudioDuration {
DefaultCodecDuration,
MatchVideoDuration,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against MpdAudioDuration
, 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 mpdaudioduration = unimplemented!();
match mpdaudioduration {
MpdAudioDuration::DefaultCodecDuration => { /* ... */ },
MpdAudioDuration::MatchVideoDuration => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when mpdaudioduration
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant MpdAudioDuration::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
MpdAudioDuration::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 MpdAudioDuration::NewFeature
is defined.
Specifically, when mpdaudioduration
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on MpdAudioDuration::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 this setting only when your output will be consumed by a downstream repackaging workflow that is sensitive to very small duration differences between video and audio. For this situation, choose Match video duration. In all other cases, keep the default value, Default codec duration. When you choose Match video duration, MediaConvert pads the output audio streams with silence or trims them to ensure that the total duration of each audio stream is at least as long as the total duration of the video stream. After padding or trimming, the audio stream duration is no more than one frame longer than the video stream. MediaConvert applies audio padding or trimming only to the end of the last segment of the output. For unsegmented outputs, MediaConvert adds padding only to the end of the file. When you keep the default value, any minor discrepancies between audio and video duration will depend on your output audio codec.
Variants (Non-exhaustive)§
This enum is marked as non-exhaustive
DefaultCodecDuration
MatchVideoDuration
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 MpdAudioDuration
impl MpdAudioDuration
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 MpdAudioDuration
impl AsRef<str> for MpdAudioDuration
source§impl Clone for MpdAudioDuration
impl Clone for MpdAudioDuration
source§fn clone(&self) -> MpdAudioDuration
fn clone(&self) -> MpdAudioDuration
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl Debug for MpdAudioDuration
impl Debug for MpdAudioDuration
source§impl Display for MpdAudioDuration
impl Display for MpdAudioDuration
source§impl From<&str> for MpdAudioDuration
impl From<&str> for MpdAudioDuration
source§impl FromStr for MpdAudioDuration
impl FromStr for MpdAudioDuration
source§impl Hash for MpdAudioDuration
impl Hash for MpdAudioDuration
source§impl Ord for MpdAudioDuration
impl Ord for MpdAudioDuration
source§fn cmp(&self, other: &MpdAudioDuration) -> Ordering
fn cmp(&self, other: &MpdAudioDuration) -> 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 MpdAudioDuration
impl PartialEq for MpdAudioDuration
source§fn eq(&self, other: &MpdAudioDuration) -> bool
fn eq(&self, other: &MpdAudioDuration) -> bool
self
and other
values to be equal, and is used
by ==
.source§impl PartialOrd for MpdAudioDuration
impl PartialOrd for MpdAudioDuration
source§fn partial_cmp(&self, other: &MpdAudioDuration) -> Option<Ordering>
fn partial_cmp(&self, other: &MpdAudioDuration) -> 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 MpdAudioDuration
impl StructuralPartialEq for MpdAudioDuration
Auto Trait Implementations§
impl Freeze for MpdAudioDuration
impl RefUnwindSafe for MpdAudioDuration
impl Send for MpdAudioDuration
impl Sync for MpdAudioDuration
impl Unpin for MpdAudioDuration
impl UnwindSafe for MpdAudioDuration
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