[Asterisk-video] H264 and Grandstream

[John Martin]

Hi Atle,
  If you need H.263 then ffasterisk and gstreamer can create files in
Asterisk format. 

  I've only tried gstreamer and I find I have to post process the files
to get it to adhere to a reasonable packet size and delivery schedule. 

  There should be lots of discussion about both projects in the archives
of this mailing list.

  I can't advise you on ffmpeg and x264 support for asterisk file
formats, we gave up trying to use opensource h264 encoders and used our
own in the end... If you're looking for something to test with then we
have some test sequences that should work well for Grandstream on our
website http://www.aupix.com/support/astvideo.htm 

John

-----Original Message-----
From: asterisk-video-bounces at lists.digium.com
[mailto:asterisk-video-bounces at lists.digium.com] On Behalf Of Atle
Samuelsen
Sent: 30 January 2007 08:49
To: Development discussion of video media support in Asterisk
Subject: Re: [Asterisk-video] H264 and Grandstream

Hi John Martin,

That's the reason *stupid* but ok.. Do you know if that's the same
truuth to H263 ? And if it is.. Maybe we should talk to ffmpeg / x264
people to make them add support for this in their software?

- Atle

* John Martin <John.Martin at AuPix.com> [070130 09:30]:
> Hi Atle,
>   Asterisk uses its own h264 file format. You have to chop up a
standard
> stream and re-assemble into a stream containing packets with
(possibly)
> multiple NALs and headers on the front of each packet. The headers
> contain timestamp and packet lengths, plus any marker bits.
> 
>   We've developed our own solution for this but I'm not aware of any
> opensource way of achieving it at the moment. I'm sure others will
pipe
> up if there is a way.
> 
> Regards, John
> 
> -----Original Message-----
> From: asterisk-video-bounces at lists.digium.com
> [mailto:asterisk-video-bounces at lists.digium.com] On Behalf Of Atle
> Samuelsen
> Sent: 29 January 2007 15:19
> To: asterisk-video at lists.digium.com
> Subject: [Asterisk-video] H264 and Grandstream
> 
> 
> Hi guys,
> 
> I'm haveing some problems when trying to encode video with ffmpeg. Has
> anybody been able to resample a avi file to h264 format so asterisk
can
> eat it?
> 
> I'm trying now with
> 
> ffmpeg -i /home/clona/test.avi -s 352x288 test.h264
> 
> When doing this I get a h264 encoded file (verified with x264) but I'm
> not able to make view it when calling into asterisk from a GSV3000
> phone.
> 
> Anybody have any ideas on what I'm doing wrong?
> 
> - Atle
> 
> 
> 
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