asfdemuxer backward trick play

[meeshel]

Hello.

I want to implement the backward playback(-2.0x, -4.0x ) in asfdemux. 
(gst-plugins-ugly-0.10.17/gst/asfdemux/gstasfdemux.c)
Now, it's not supported. It blocked like this.

gst_asf_demux_handle_seek_event()
{    ......
     if(G_UNLIKELY(rate <= 0.0){
            GST_LOG_OBJECT(demux, "backward playback is not supported yte");
            return FALSE;
     }
     .....
}

Could you give any hints for implement?

And I wonder, why asfdemux did not support seek in pull based mode?

Thanks,
Meeshel Choi.


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