#[non_exhaustive]pub enum CmafPtsOffsetHandlingForBFrames {
MatchInitialPts,
ZeroBased,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against CmafPtsOffsetHandlingForBFrames
, 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 cmafptsoffsethandlingforbframes = unimplemented!();
match cmafptsoffsethandlingforbframes {
CmafPtsOffsetHandlingForBFrames::MatchInitialPts => { /* ... */ },
CmafPtsOffsetHandlingForBFrames::ZeroBased => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when cmafptsoffsethandlingforbframes
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant CmafPtsOffsetHandlingForBFrames::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
CmafPtsOffsetHandlingForBFrames::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 CmafPtsOffsetHandlingForBFrames::NewFeature
is defined.
Specifically, when cmafptsoffsethandlingforbframes
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on CmafPtsOffsetHandlingForBFrames::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. Use this setting only when your output video stream has B-frames, which causes the initial presentation time stamp (PTS) to be offset from the initial decode time stamp (DTS). Specify how MediaConvert handles PTS when writing time stamps in output DASH manifests. Choose Match initial PTS when you want MediaConvert to use the initial PTS as the first time stamp in the manifest. Choose Zero-based to have MediaConvert ignore the initial PTS in the video stream and instead write the initial time stamp as zero in the manifest. For outputs that don’t have B-frames, the time stamps in your DASH manifests start at zero regardless of your choice here.
Variants (Non-exhaustive)§
This enum is marked as non-exhaustive
MatchInitialPts
ZeroBased
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 CmafPtsOffsetHandlingForBFrames
impl CmafPtsOffsetHandlingForBFrames
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 CmafPtsOffsetHandlingForBFrames
impl AsRef<str> for CmafPtsOffsetHandlingForBFrames
source§impl Clone for CmafPtsOffsetHandlingForBFrames
impl Clone for CmafPtsOffsetHandlingForBFrames
source§fn clone(&self) -> CmafPtsOffsetHandlingForBFrames
fn clone(&self) -> CmafPtsOffsetHandlingForBFrames
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 CmafPtsOffsetHandlingForBFrames
impl From<&str> for CmafPtsOffsetHandlingForBFrames
source§impl Ord for CmafPtsOffsetHandlingForBFrames
impl Ord for CmafPtsOffsetHandlingForBFrames
source§fn cmp(&self, other: &CmafPtsOffsetHandlingForBFrames) -> Ordering
fn cmp(&self, other: &CmafPtsOffsetHandlingForBFrames) -> 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 CmafPtsOffsetHandlingForBFrames
impl PartialEq for CmafPtsOffsetHandlingForBFrames
source§fn eq(&self, other: &CmafPtsOffsetHandlingForBFrames) -> bool
fn eq(&self, other: &CmafPtsOffsetHandlingForBFrames) -> bool
self
and other
values to be equal, and is used
by ==
.source§impl PartialOrd for CmafPtsOffsetHandlingForBFrames
impl PartialOrd for CmafPtsOffsetHandlingForBFrames
source§fn partial_cmp(
&self,
other: &CmafPtsOffsetHandlingForBFrames
) -> Option<Ordering>
fn partial_cmp( &self, other: &CmafPtsOffsetHandlingForBFrames ) -> 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 CmafPtsOffsetHandlingForBFrames
impl StructuralPartialEq for CmafPtsOffsetHandlingForBFrames
Auto Trait Implementations§
impl Freeze for CmafPtsOffsetHandlingForBFrames
impl RefUnwindSafe for CmafPtsOffsetHandlingForBFrames
impl Send for CmafPtsOffsetHandlingForBFrames
impl Sync for CmafPtsOffsetHandlingForBFrames
impl Unpin for CmafPtsOffsetHandlingForBFrames
impl UnwindSafe for CmafPtsOffsetHandlingForBFrames
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