播放器可能需要多路复用的视频和音频，因此请添加无声音轨。

The player might expect muxed video and audio so add a silent audio track.

Apple HLS文档说：

媒体段文件通常由流分段器生成，基于来自编码器的输入，由一系列.ts文件组成，包含携带H.264视频和 AAC，MP3或AC-3音频的MPEG-2传输流段

The media segment files are normally produced by the stream segmenter, based on input from the encoder, and consist of a series of .ts files containing segments of an MPEG-2 Transport Stream carrying H.264 video and AAC, MP3, or AC-3 audio

技术说明TN2224 和协议的第7版修订版引入了对备用再现（unmuxed streams）的支持，但这是在控制播放的主播放列表中使用 EXT-X-MEDIA 标签完成（您的是媒体播放列表）。

Support for audio-only streams is mentioned in Technical Note TN2224 and the 7th revision of the protocol introduced support for alternate renditions (unmuxed streams) but this is done with EXT-X-MEDIA tags in a master playlist controlling the playback (yours is a media playlist).