actionscript 3 - Get video encoding type or mime type before playing -



actionscript 3 - Get video encoding type or mime type before playing -

i'm developing video player in as3. need switch between mp4 , flv files. easy if do:

netstream.play(encoding + ":" + videosrc);

the problem getting value encoding. don't want rely on extension observe this, since there might not one. thought create head request on file , read content-type header, can't seem urlrequest , urlrequestheader since back upwards post , get. how can observe encoding without kind of prior knowledge?

actionscript-3 flash

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