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The valve is a simple element that drops buffers when the <span class="type">"drop"</span>
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><code class="literal">TRUE</code></a> and lets then through otherwise.
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Any downstream error received while the <span class="type">"drop"</span> property is <a
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><code class="literal">FALSE</code></a>
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is ignored. So downstream element can be set to <code class="literal">GST_STATE_NULL</code> and removed,
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without using pad blocking.