Although not FLV, I wrote a sample AMF 0/AMF 3 client based on
flash.utils.ByteArray and flash.net.URLLoader. See my blog entry
http://blogs.adobe.com/pfarland/2008/06/using_amf_with_flashneturlload.html
which mentions the ActionScript source which was submitted to BlazeDS as an
attachment to BLZ-209. See amf.zip at:
https://bugs.adobe.com/jira/browse/BLZ-209
For FLV, the key is to understand the Type column for each field. I took a
quick look at the spec and it seems to use conventions similar to the SWF
format.
private function onComplete(e:Event):void
{
var ba:ByteArray = loader.data as ByteArray;
if (ba != null && ba.length > 9)
{
// Peek at the first 3 bytes to check for 'F' 'L' 'V'
if (ba.readUnsignedByte() == 0x46 && ba.readUnsignedByte() == 0x4C &&
ba.readUnsignedByte() == 0x56)
{
ba.position = 0;
decodeFLV(ba);
}
}
}
i.e. For UI8, use readUnsignedByte() to get a uint
For UB[n], use readUnsignedByte() and then shift to find the relevant bit(s)
for each flag.
For UI32, use readUnsignedInt() to get a uint
For UI24, use 3 successive readUnsignedBytes() and shift values appropriately
to form a uint from the 24bits.
etc...
Pete
-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf
Of gilbert_mizrahi
Sent: Wednesday, March 18, 2009 6:44 PM
To: [email protected]
Subject: [flexcoders] Re: Where I can examples of how to use ByteArray
Alex, Thanks. Yes I have seen that, but there is noting similar for what I
want, that is to read the flv content to get its tags according to FLV spec
from http://www.adobe.com/devnet/flv/.
Pete, that is a good starting point, thank you. However, I need more help to be
able to "read" the data from the FLV. readByte() returns an int and readBytes
expects at least one parameter of type ByteArray which I have no clue what to
put in there. And readObject(0 throws an ouf of bounds error.
Gilbert
--- In [email protected], Peter Farland <pfarl...@...> wrote:
>
> You may want to have loader as a member variable so that you can access it in
> other contexts or make subsequent requests without using init()
>
> private var loader:URLLoader;
>
>
> Also, you should set the loader.dataFormat to URLLoaderDataFormat.BINARY
> before loading binary data. See:
> http://livedocs.adobe.com/flex/3/langref/flash/net/URLLoader.html#dataFormat
>
> Finally, in the complete event, you can cast loader.data to a ByteArray:
>
> private function onComplete(e:Event):void
> {
> var byteArr:ByteArray = loader.data as ByteArray;
> // ...
> }
>
> Pete
>
> -----Original Message-----
> From: [email protected] [mailto:[email protected]] On
> Behalf Of gilbert_mizrahi
> Sent: Wednesday, March 18, 2009 11:22 AM
> To: [email protected]
> Subject: [flexcoders] Where I can examples of how to use ByteArray
>
> I have searched everywhere and I can't find useful examples of how to use the
> ByteArray class and the Flex 3 documentation does not include much.
>
> I want to read and FLV file with ByteArray, but I don't know how.
>
> I tried:
>
> private function init():void
> {
> var request:URLRequest = new URLRequest("assets/street.flv");
> var loader:URLLoader = new URLLoader();
> try {
> loader.load(request);
> } catch (error:ArgumentError) {
> trace("An ArgumentError has occurred.");
> } catch (error:SecurityError) {
> trace("A SecurityError has occurred.");
> }
> loader.addEventListener(Event.COMPLETE, onComplete);
> }
>
> private function onComplete(e:Event):void
> {
> var byteArr:ByteArray = new ByteArray ();
> byteArr.readByte(); //????
> trace("byteArr "+byteArr);
> }
>
> the ByteArray readByte method accept 0 parameters, so what should I do?
>
>
>
> ------------------------------------
>
> --
> Flexcoders Mailing List
> FAQ: http://groups.yahoo.com/group/flexcoders/files/flexcodersFAQ.txt
> Alternative FAQ location:
> https://share.acrobat.com/adc/document.do?docid=942dbdc8-e469-446f-b4cf-1e62079f6847
> Search Archives:
> http://www.mail-archive.com/flexcoders%40yahoogroups.comYahoo! Groups Links
>
------------------------------------
--
Flexcoders Mailing List
FAQ: http://groups.yahoo.com/group/flexcoders/files/flexcodersFAQ.txt
Alternative FAQ location:
https://share.acrobat.com/adc/document.do?docid=942dbdc8-e469-446f-b4cf-1e62079f6847
Search Archives: http://www.mail-archive.com/flexcoders%40yahoogroups.comYahoo!
Groups Links
