Restarted stream contains legacy frames

[Nicolas Dufresne]

Le vendredi 04 septembre 2020 à 10:18 +0000, Timtchenko, Michael a
écrit :
> Hi gstreamers,
>  
> i’m facing a little problem regarding the stopping/resuming of my
> camera stream with gstreamer. When I restart the stream by a
> transition from GST_STATE_PLAYING (1) -> GST_STATE_PAUSING (2)
> ->GST_STATE_ PLAYING (3), the stream contains the last frames from
> (1).
>  
> Is there a proper way to clear the pipeline? I don’t want to see any
> old frames when I restart my stream.

Pause state is not often used for live pipelines, it will just block
the rendering. Best is to cycle through NULL, or perhaps ready.

>  
> I’ve also tried to send flushing events, but without success. I did
> this by sending the events gst_event_new_flush_start() and
> gst_event_new_flush_stop().
>  
> My pipeline looks like this:
>  
> udpsrc port=55555 caps=\"application/x-rtp, media=(string)video,
> clock-rate=(int)90000, encoding-name=(string)H264, payload=(int)96\"

It might be wise to use rtpjitterbuffer here.

> ! rtph264depay
> ! avdec_h264
> ! decodebin
> ! videoconvert
> ! glupload
> ! appsink
>  
> Advice is welcome.
>  
> BR
> Michael
> 
> 
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