[h323plus] H264 PLUGIN in H323Plus

Prasad Mohire prasadmohire at gmail.com
Mon Nov 23 15:54:33 EST 2009

Hi Ooi,

Can you please tell me what all changes you have done in H.264 plugin to
make it work?

At my end, I could load the H.264 plugin in OpenMCU. It decodes the video
well but while encoding it is giving some trouble.
I can see picture on mirial softphone but it freezes in few seconds. If I
cover and uncover the camera on other leg, it agian shows picture for few
seconds and then freezes again.

On mirial it shows me high cpu usage warning and packet loss warning.
If I connect using Polycom PVX, I cant see anything. In media stats of
polycom, it shows video frame rate as 0, high packet loss and Video Format
as '----' on RX side.

I checked plugin code, there I found H264_PAYLOAD_SIZE is already set to
1400. I tried changing it to 1200 and 800. It didn't help.

Can you please tell me if you have done anything other than this?


On Mon, Nov 23, 2009 at 9:34 AM, ooi khai chin <ooikhaichin at yahoo.com>wrote:

> Hi All,
> Currently, my H264 plugin able to work with polycom. I found that the media
> statistic(polycom PVX ) only show the frame rate video format, and display
> the image if my sending encoded data is not more than 1.4KB.
> In my code, I do the fragmentation once it greater than 1.4KB(like libx264
> do).
> However, I had read some documentations and all of them  mentioned about
> H.241 only support the single NAL unit mode(mode 0).
> I wonder how this mode handle if encoded data greater than 1.4KB(usually
> happen)???
> Any Idea?
> Thanks.
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