Hi,
I've been trying to create a way to play a media file that is packaged with an AIR application from within a native extension. However I've come into a problem that seems to be related to the way the assets are getting packaged into the APK. I'm trying to access the files using the Android AssetManager something like:
context.getAssets().openFd( "video/big_buck_bunny.mp4" );
However this commonly results in the error:
java.io.FileNotFoundException: This file can not be opened as a file descriptor; it is probably compressed
I can list out all the assets in the AssetManager and can definitely confirm the asset is known and present. When I inspect the packaged APK, indeed the file is compressed and not Stored as it should be. eg the following is a file from unzip -v App.apk
5510872 Defl:N 5044897 9% 06-11-14 12:15 30431fa9 assets/video/big_buck_bunny.mp4
where you can see the Defl:N indicates it's compressed (by 9%). However some files will be Stored correctly:
390668 Stored 390668 0% 11-15-13 10:06 2d380eae assets/Default-568h@2x.png
5015 Defl:N 4384 13% 03-25-13 21:24 2b6284ce assets/Default.png
211743 Defl:N 211329 0% 11-12-13 10:58 9384a8ae assets/icons/icon512x512.png
6536 Stored 6536 0% 11-12-13 10:58 ea5ca1e6 assets/icons/icon57x57.png
It seems very inconsistent with an AIR application. According to the documentation Android should not compress the following asset file types (from Package.cpp in the aapt source code):
".jpg", ".jpeg", ".png", ".gif", ".wav", ".mp2", ".mp3", ".ogg", ".aac", ".mpg", ".mpeg", ".mid", ".midi", ".smf", ".jet", ".rtttl", ".imy", ".xmf", ".mp4", ".m4a", ".m4v", ".3gp", ".3gpp", ".3g2", ".3gpp2", ".amr", ".awb", ".wma", ".wmv"
and indeed when I package the same assets in an android packaged application the files aren't compressed.
Of course I know I can work around this by reading the file out and writing it to a cache or temp location however this seems to be a bug in the way AIR is packaging Android applications and was wondering if anyone has encountered this or found a workaround.
Cheers,
Michael