问题
I am using audio element to stream an ogg source from an icecast server. Does the audio element extract icy metadata and is there a way to access it through javascript?
Basically, I want to show "currently playing" information of a radio station I am streaming. What are my options?
Thanks!
回答1:
No, your HTML5 elements are only aware of the stream data, and aren't even making the appropriate request to fetch the metadata.
See these posts:
Developing the client for the icecast server
Pulling Track Info From an Audio Stream Using PHP
http://www.smackfu.com/stuff/programming/shoutcast.html
Now, this isn't impossible by any means. You just have to do it server-side. (See that second link in particular.)
I should also point out that on a full-blown SHOUTcast Server (haven't tested with Icecast, but its worth a try) generates "7.html" which contains data on the number of listeners, max listeners, peak listeners, stereo/mono, bitrate, and current track name as comma-separated values. Like this:
2,1,33,625,2,128,J Mascis - Not Enough
If you can fetch http://yourstreamingserver:port/7.html, then you can get this data very easily.
回答2:
In case of an Ogg container stream (So both Vorbis and Opus), at least Firefox supports javascript access to the metadata. This is currently only "vendor specific" Javascript API: audio.mozGetMetadata();
On the other hand if you go with Icecast 2.4.1 you can access metadata independently through a JSON API. Lack of synchronization as pointed out in other comments applies. It's usually "close enough" though.
来源：https://stackoverflow.com/questions/6115531/is-it-possible-to-get-icecast-metadata-from-html5-audio-element