[gst-devel] A problem to generate H.264 file for Asterisk by GStreamer

[Chih-Wei Huang]

Hello,
Recently someone emailed to ask me for the asterisk plugins
I wrote about two years ago.
Actually I have planned to submit my work to you,
but still too busy to finish that.

Anyway, to let things move on,
I decided to publish the plugin to the list
so someone can review and comment on it,
and even merge to the mainline.
Sorry it is for gstreamer-good about two years ago,
may be 0.10.6. I didn't follow the development closely,
so I don't know if it still works for the recent version.
I hope I can have more time to make it up
and give you a clean patch.
(if you think it's worth doing that)


Cheers,
Chih-Wei


Chih-Wei Huang said:
> Hi guys,
> This is a cross-post to asterisk-video, gstreamer-devel and x264-devel.
> I think the subject is related to these mailing lists.
> (Since I haven't subscribe all the lists yet, please CC your post to me. Thanks a lot!)
> 
> I'm trying to use GStreamer to generate .h264 file for Asterisk to playback.
> The test environment is
> 
> The OS: Fedora Core 6, with updates rpms.
> Asterisk: 1.4.4
> GStreamer: core and all plugins from CVS 20070511
> x264: 20070322
> ffmpeg: 20070514
> 
> I use the command to generate the files for Asterisk:
> 
> gst-launch filesrc location=myfile.mp4 ! decodebin name=demux ! videoscale !
>  video/x-raw-yuv,width=352,height=288 ! x264enc bitrate=128 byte-stream=1 ! rtph264pay !
>  asteriskenc ! filesink location=test.h264 demux. ! queue ! audioconvert ! audioresample !
>  audio/x-raw-int,rate=8000,channels=1 ! gsmenc ! filesink location=test.gsm
> 
> where asteriskenc is a plugin of GStreamer written by me, which could
> convert an H.264 RTP stream into Asterisk format. It's based on asteriskh263.
> All the other elements are standard GStreamer plugins.
> 
> The .h264 file did be generated. No significant error is found.
> Then I used soft-phone eyeBeam 1.5.7 and PortSIP 3.12 to test it.
> I had Asterisk play the .h264 file by Background command.
> From the ethereal log, I did see H.264 RTP packets are sent from Asterisk.
> However, there is *no video* on the softphone. OOPS!
> 
> On the other hand, I'm sure the H.264 support of Asterisk is fine.
> I can use Record command to record the H.264 video from eyeBeam
> and play it back.
> 
> What's wrong with it? Does it mean the stream generated by x264
> is *not compatible* with eyeBeam or PortSIP?
> I see the plugin x264enc has many parameters.
> Do I need to specify some them?
> 
> Suggestions or hints are welcome!
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