cross domain limitations

[benbro]

Is it possible to play mp3 stream in flash across domains but not the metadata or none of them?

If it is just the metadata, I think using a server side script can help.

[Remcoman]

You can use the flash.media.Sound object to play mp3 files/ streams. However this has some limitations:

• It requires a cross domain policy file on the server which contains the stream
• It does not really support streaming files and it sees the mp3 stream as a endless file.
  This has the unfortunate side effect that it will keep loading the stream into memory until memory runs out (and the browser crashes). Other api's try to prevent this by creating a new Sound object when memory usage reaches a certain level and crossfading the new Sound object with the old one. However....this will never work perfectly.

Other reasons i only build the api for Adobe AIR is that flash has some limitations when running in the browser.

• The flash.net.URLStream does not give reponse headers which are really needed (this is more a limitation of the browser because of the plugin uses the browser code to do network calls. AIR has no problem with this.)
• Some shoutcast servers do not respond with valid http and cause the flash.net.URLStream to stop working (you won't get any response). I therefore build my own simple http client which could also handle shoutcasts version of http. I used flash.net.Socket to achieve this. However Sockets and cross domain calls in Flash are a pain in the butt.

You might try to create a server side script to strip out the metadata and publish the result back to flash (Of course this will cost you a lot of bandwidth because most people listen to streams all day and all the data will pass through your scripts!) Instead of returning a mp3 stream i would wrap the mp3 or aac into a flv file (which is just a container format and can also be audio only). This would prevent the memory problems (i've run my Shoutcast API for a couple of hours without seeing the memory usage rise above 30 mb) and give you more control over the buffer. You could read my code to determine how to use the flv format or check http://download.macromedia.com/f4v/video_file_format_spec_v10_1.pdf.

Good luck!

Op 9 aug 2011, om 01:40 heeft benbro het volgende geschreven:

Is it possible to play mp3 stream in flash across domains but not the metadata or none of them?

If it is just the metadata, I think using a server side script can help.

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