[gst-devel] How do I clean a pipeline to start/stop it several times?

[AJAY GAUTAM]

There is two way :
1. you can delete old pipeline ,delete the pipeline object and set new video
path and with creating new pipeline after getting EOS.
2. you can do like this after getting EOS:
gst_element_set_state( pipeline, GST_STATE_NULL );
gst_element_set_state( pipeline, GST_STATE_READY);
then set new video path
gst_element_set_state( pipeline, GST_STATE_PLAY);

Definitly it will work.



On Wed, Jul 15, 2009 at 5:13 PM, ldac <ldacvs at gmail.com> wrote:

>
>    Hi all,
>
> I have programmed a C application where I capture video, then I encode
> it, and finally I stream it using an udpsink element. It works, but if I
> stop the pipeline (sending it EOS) and then start it again, I get old
> video, when it should be alive. How can I clean absolutely the pipeline
> to avoid this?
>
>    My code is something like this:
>
>        ...
>        // Create the elements
>        pipeline = gst_pipeline_new( "pipe" );
>        video_src = gst_element_factory_make( "mfw_v4lsrc",
> "video-source" );
>        video_enc = gst_element_factory_make( "mfw_vpuencoder",
> "video-encoder" );
>        sink = gst_element_factory_make( "udpsink", "sink" );
>        // Add the elements to the pipeline
>        gst_bin_add_many( GST_BIN( pipeline ), video_src, video_enc,
> sink, NULL );
>        gst_element_link_with_filter( video_src, video_enc, &settings );
>        gst_element_link( video_enc, sink );
>        ...
>        // Start/Stop the video stream
>        while ( 1 )
>        {
>             if ( do_stream )
>             {
>                 gst_element_set_state( pipeline, GST_STATE_PLAYING );
>                 g_main_loop_run( loop );
>                 gst_element_set_state( pipeline, GST_STATE_NULL );
>             }
>             else
>                sleep( 1 );
>        }
>        ...
>
>    Another function changes the variable 'do_stream' to true/false, and
> send also the EOS signal to the pipeline when required.
>
>    So, specifically, my question is: What do I clean my pipeline when
> stopped to start again with the buffers and everything clean? Do I have
> to delete the pipeline object and do I have to create and link all the
> pipeline again?
>
>    Thank you very much.
>    All the best.
>    LD.
>
>
>
>
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-- 
Thanx & Regards
Ajay Gautam
+91-9717785580
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