[Asterisk-video] app_mp4 fixed video playback

Olle E Johansson oej at edvina.net
Fri Aug 31 02:36:01 CDT 2007


31 aug 2007 kl. 09.18 skrev Klaus Darilion:

> btw: how is the format for AMR inside ast_frame?
>
> like in RTP:
>    1 byte CMR + x bytes ToC (frame type) + AMR payloads
>
> or like in AMR file:
>    1 byte header (frame type) + AMR frame
>
> or something completely different?
>
> IMO this should be defined and written down somewhere.
>
>
Well, the issue here is licensing really. We already have a GSM frame.
I think it should be ok to handle AMR frames and maybe have subframes
for each type. One issue then will be that there can be negotiation  
within
the stream so we might end up with different ends of the conversation  
negotiating
different codecs that we can't support...

i don't know how far down the AMR decoding ladder we can walk without
being on thin ice license-wise. I might be far too cautious.

I would like a patch for AMR pass through and accepting old GSM
as an AMR subtype.

/O





More information about the asterisk-video mailing list