HarmonyOS Developer Technology

Oct 13, 2025 · Mobile Development

Implementing External Subtitles with HarmonyOS AVPlayer: A Step-by-Step ArkTS Guide

This tutorial demonstrates how to implement external subtitles (SRT/VTT) in HarmonyOS using AVPlayer's subtitleUpdate event, covering subtitle file loading via addSubtitleFromFd, callback registration, synchronization, and limitations like pre-playback-only subtitle setting.