![]() ![]() Garbage collection monitoring: logs statistics of garbage collection pauses every 2 minutes.Abandoned player cleanup threshold: when the player is not queried in the specified amount of time, it is stopped.Stuck track threshold: when no data from a playing track comes in the specified time, an event is sent.Frame buffer duration: how much of audio is buffered in advance.Opus encoding and resampling quality settings.There are various configuration settings that can be modified: These can be easily enabled by calling:ĪudioPlayerManager playerManager = new DefaultAudioPlayerManager() ĪudioSourceManagers. LavaPlayer includes the support for delegating the decoding/encoding/resampling operations to separate nodes running the lavaplayer-node Spring Boot application. This makes loading playlists pretty fast. Since the tracks hold only minimal meta-information (title, author, duration and identifier), loading playlists does not usually require the library to check the page of each individual track for sources such as YouTube or SoundCloud. The handler has separate methods for receiving resolved tracks, resolved playlists, exceptions or being notified when nothing was found for the specified identifier. When loading tracks, you pass the manager an identifier and a handler which will get asynchronously called when the result has arrived. When creating an instance of an AudioPlayerManager, sources where the tracks should be loaded from with it must be manually registered. This provides a millisecond accuracy on seeking. LavaPlayer handles it by remembering the position where it was requested to seek to, jumping to the highest position which is not after that and then ignoring the audio until the actual position that was requested. When a seek is performed on a track which has not yet started, it will start immediately from the chosen position.ĭue to media containers supporting seeking at different resolutions, the position that a media player can start reading data from might be several seconds from the location that the user actually wanted to seek to. When a seek is performed on a playing track, the previously buffered audio samples will be provided until the seek is finished (this is configurable). Seeking is supported on all non-stream formats and sources. This avoids thread leaks even when the audio player is not shut down as it is supposed to. When an audio player is not queried for an user-configured amount of time, then the playing track is aborted and the thread cleaned up. Resource leaks are unlikely because there are no additional processes launched and only one thread per playing track.When no volume adjustment is applied, the packets from YouTube are directly passed to output, which saves CPU cycles. The most common format used in YouTube is Opus, which matches the exact output format required for Discord. ![]() The amount of memory used per track when testing with YouTube was at most 350 kilobytes per track plus the off-heap memory for the thread stack, since there is one thread per playing track. Memory usage is both predictable and low.This gives it a very fine-grained control over the resources that it uses, which means a low memory footprint as well as the chance to skip decoding and encoding steps altogether when the input format matches the output format. ![]() Different sources and container formats are handled in Java, while decoding and encoding of audio are handled by embedded native libraries. What makes LavaPlayer unique is that it handles everything in the same process. OGG streams (Opus, Vorbis and FLAC codecs). ![]()
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