FLAC is packetized incorrectly

http://streams.videolan.org/issues/9442/for.flac

[0x7f68f8c01f38] flac decoder error: The decoder encountered reserved fields in use in the stream.

http://streams.videolan.org/issues/9442/mad.flac

[0x7f5e54006f08] flac decoder warning: the decoder was aborted by the read callback.
[0x7f5e54006f08] flac decoder warning: an error in the stream caused the decoder to lose synchronization.

Those 2 samples have frames with a synchronization marker inside them. The data after the synchronization looks like a correct header, up to the crc8 header byte.

To know that frames stop after the next synchronization marker and not this one, we have to crc16 check the full frame.