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

[Philip Jägenstedt]

Why not just have separate pipelines for the two tasks?

On Wed, Jul 15, 2009 at 13:43, 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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-- 
Philip Jägenstedt