Does anyone know how an Speex frame is encapsulated into a RTMP audio packet,
or where I can find more information about it?
I know Speex frames are 20 ms and 70 bits long when encoding quality is set to
8, but the RTMP audio samples I captured contain 40 ms, and the payload 140
bytes long.
I can't say that each RTMP packet contains 2 Speex frames because the first
byte of each RTMP audio packet payload is an identifier of the codec used (In
my case 0xB2 = RTMP_AUDIO_SOUND_FORMAT_SPEEX + RTMP_AUDIO_SOUND_RATE_55_KHZ +
RTMP_AUDIO_SOUND_SIZE_16_BITS + RTMP_AUDIO_SOUND_TYPE_MONO, although
RTMP_AUDIO_SOUND_RATE_55_KHZ is ignored because flash uses 16kHz when speex is
used), and not part of the encoded frame, and this leaves me with 139 bytes.
Thanks in advance,
Andre
_______________________________________________
osflash mailing list
[email protected]
http://osflash.org/mailman/listinfo/osflash_osflash.org
