Common problems with HTML5 audio include automatic playback intercept, format compatibility and mobile restrictions. Solution: 1. Automatic playback needs to be muted or triggered after user interaction; 2. Provide support for multiple formats such as MP3, Ogg, AAC; 3. Mobile playback must be bound to user gesture events such as click or touchstart.

HTML5's <audio></audio> tag makes it easy to embed audio on web pages, but in actual use, it often encounters problems such as inability to play and automatic playback being intercepted by the browser. These problems are often not caused by incorrect code writing, but by inconsistent browser policies, device restrictions or format support.

Automatic playback is blocked

Many websites want audio to be played immediately after the page is loaded, but modern browsers prohibit automatic playback by default for user experience, especially playback with sound.

• Common phenomena : There is no response after the page is refreshed, or the control bar shows a pause status.
• Solution :
  • Muted Autoplay: Setting the muted property allows most browsers to allow automatic playback.
  • The user triggers playback after the first interaction: for example, clicking buttons, sliding pages, etc. and then calling .play() .
  • Note that mobile terminals are stricter, and some browsers do not allow automatic playback even if they are silent.

Sample code:

 <audio src="music.mp3" muted autoplay></audio>

Audio format compatibility issues

Different browsers support different audio encoding formats. If you only provide one format, it may not be able to play in some browsers.

• Mainstream format comparison :
  • MP3: Almost all browsers support it (except some older versions of Firefox).
  • Ogg Vorbis: Firefox and Chrome support is good.
  • AAC/M4A: Safari supports better, and Chrome also basically supports it.
• Suggested practices :
  • Provide multiple formats of <source> tags, and the browser will automatically select the first one that can be played.

Sample code:

 <audio controls>
  <source src="music.mp3" type="audio/mpeg">
  <source src="music.ogg" type="audio/ogg">
  Your browser does not support audio playback.
</audio>

Mobile playback restrictions and user gesture requirements

On iOS and Android, browsers have additional restrictions on audio playback, especially the fact that they cannot directly send playback through JavaScript unless the user takes the initiative to operate.

• Typical problem : There is no sound when clicking the button, and there is no error on the console.
• Coping methods :
  • All playback behaviors are bound to user events, such as click and touchstart .
  • After the first playback fails, the user is prompted to interact with the page and try again.
  • You can try "preload" and delay playback in iOS, but it still needs to be triggered by the user.

Sample code:

 <button onclick="document.querySelector(&#39;audio&#39;).play()">Play music</button>

Basically these common HTML5 audio problems. Although each browser handles slightly differently, it can cover most of the situation by paying attention to the autoplay strategy, format compatibility and user interaction mechanism.

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