I want to be able to play my level sequence in code, so I can trigger it with a method whenever I need it. However I can’t find how to reference a level sequence in C++ and how to play it. How would I go about doing this?
Thank you in advance.
You should be able to create a level sequence player, LevelSequencePlayer.h:
static ULevelSequencePlayer* CreateLevelSequencePlayer(UObject* WorldContextObject, ULevelSequence* LevelSequence, FMovieSceneSequencePlaybackSettings Settings);
and pass it the ULevelSequence you want to play. You might get the ULevelSequence like this:
FStringAssetReference SequenceName("/Game/NewLevelSequence.NewLevelSequence");
ULevelSequence* Asset = Cast<ULevelSequence>(SequenceName.TryLoad());
Then, call Play() on the returned ULevelSequencePlayer.
Thank you very much!
Max.Chen , how do I use this function to create level sequence player , im new to c++
Error MyPlayerController.cpp.obj : error LNK2019: unresolved external symbol “public: static class ULevelSequencePlayer * __cdecl AMyPlayerController::CreateLevelSequencePlayer(class UObject *,class ULevelSequence *,struct FMovieSceneSequencePlaybackSettings)” (?CreateLevelSequencePlayer@AMyPlayerController@@SAPEAVULevelSequencePlay
er@@PEAVUObject@@PEAVULevelSequence@@UFMovieSceneSequencePlaybackSettings@@@Z) referenced in function “public: void __cdecl AMyPlayerController::CallTimer(void)” (?CallTimer@AMyPlayerController@@QEAAXXZ)
Sorry for the slow response. Looks like you need to add MovieScene and LevelSequence to the public dependency modules.
Take a look at this post: Linker error (LNK2019) when trying to play a Level Sequence
Trying to get around this too… Any working examples around maybe?
This is what I tried but no luck (camera swap and fade-in works fine but no sequence is played nor any logs are printed about failures):
Constructor:
// Init Sequence Player
CinematicSequencePlayer = ObjectInitializer.CreateDefaultSubobject<ULevelSequencePlayer>(this, LevelScriptStatics::CinematicSequencePlayername);
// Init waking up cinematic sequence
static ConstructorHelpers::FObjectFinder<ULevelSequence> MySequenceTemplate(TEXT("LevelSequence'/Game/Sequences/Cinematics/MySequence_LS'"));
if (MySequenceTemplate.Succeeded()) MySequence = MySequenceTemplate.Object;
Some other function further down the code:
if (ourPC->GetViewTarget() == CinematicCamera && ourPC->PlayerCameraManagerClass != nullptr)
{
//Fade from black
ourPC->PlayerCameraManager->StartCameraFade(1.f, 0.f, 5, FColor::Black, true);
//Sequence Settings
if (CinematicSequencePlayer && MySequence)
{
CinematicSequencePlayer->CreateLevelSequencePlayer(GetWorld(), MySequence, FMovieSceneSequencePlaybackSettings());
if (CinematicSequencePlayer->GetSequence())
{
CinematicSequencePlayer->Play();
CinematicLength = CinematicSequencePlayer->GetLength();
}
}
}May I add an additional response here? It depends whether you want a full C++ create-and-play solution or, if you’re like me, you just want to trigger a sequence that’s already in your scene. I have a single FadeIn / FadeOut sequence for entering / leaving my level that’s dropped on the map. I simply iterate the sequencer actors, and the player is already a member function of it.
for (TActorIterator<ALevelSequenceActor> it(GetWorld()); it; ++it)
{
ALevelSequenceActor *lsa = *it;
if (lsa->GetName() == TEXT("FadeOut"))
lsa->SequencePlayer->Play();
}I finally got it working.
.h
//The sequence player
UPROPERTY()
ULevelSequencePlayer* SequencePlayer;
// Sequence Assets
UPROPERTY(EditAnywhere)
ULevelSequence* SequenceAsset;
.cpp
// Setup the sequence player
if (SequenceAsset && SequencePlayer == nullptr)
SequencePlayer = ULevelSequencePlayer::CreateLevelSequencePlayer(GetWorld(), SequenceAsset, FMovieSceneSequencePlaybackSettings());
//Sequence Play
if (SequencePlayer)
{
SequencePlayer->Play();
}
}I’m trying to use this code as a guide to get my level sequence playing but visual studio says ULevelSequencePlayer, and ULevelSequence, are undefined. Is there a specific header file I need to include in order to use these types? I can’t seem to find that anywhere. Thanks.
I’m currently away from the office but if I recall correctly #include “LevelSequencePlayer.h” should do the job.
Hi,
how to render a movie (or image sequence) with specific frame rate and output format using the same level sequencer triggered from code?
i include :
#include “Runtime/LevelSequence/Public/LevelSequence.h”
#include “Runtime/LevelSequence/Public/LevelSequencePlayer.h”
but I can’t access to their function or variables. anyone did have the same experience?
its build with no error but when I want to access, for example, CreateLevelSequencePlayer() I couldn’t.
im very grateful if anyone can help, im stuck at this point.
Have you tried to add it to the UnrealBuild.cs? In order for me to access some functions I had to have the following dependency modules:
PublicDependencyModuleNames.AddRange(new string[] {
“…”,
“LevelSequence”,
“MovieScene”
});
Maybe you only need LevelSequence, maybe both, maybe you already added it, but eitherway here goes 
You have to add it to the c++ directories in the project settings in order for visual studio to access the variables and functions.
Tutorial Spanish.
Github source code.
Discussion in another entry I made.
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in .cpp
in archive build.cs add this
//level sequencer .CPP
#include <LevelSequenceActor.h>
#include <LevelSequencePlayer.h>
#include <MovieSceneSequencePlayer.h>
in archive build.cs add this
PublicDependencyModuleNames.AddRange(new string[] { "Core", "CoreUObject", "Engine", "InputCore", "LevelSequence", "MovieScene" });
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