<div>
<div>Hi,
</div><div><span class="Apple-tab-span" style="white-space:pre"> </span>Brendan & Wonchul</div><div><br></div><div><span class="Apple-tab-span" style="white-space:pre"> </span>Thanks for your replay,</div><div><br></div><div><span class="Apple-tab-span" style="white-space:pre"> </span>i use the the callback "GstAppSinkCallbacks.new_buffer" to pull the the buffer data of appsink's</div><div><br></div><div><span class="Apple-tab-span" style="white-space:pre"> </span>because of some performance issue du to comment of gstappsink's source code :)</div><div><br></div><div><span class="Apple-tab-span" style="white-space:pre"> </span>about this issue, i fixed that if cast the element pointer to appsink, </div><div><br></div><div><span class="Apple-tab-span" style="white-space:pre"> </span>before (can not get more sample but just one):</div><div><br></div><div><span class="Apple-tab-span" style="white-space:pre"> </span>cb_new_buffer (GstElement *elt, gpointer user_data)</div><div><br></div><div><span class="Apple-tab-span" style="white-space:pre"> </span>fix the issue:</div> <span class="Apple-tab-span" style="white-space:pre"> </span>cb_new_buffer (GstAppSink *elt, gpointer user_data)</div><div><br><div><span class="Apple-tab-span" style="white-space:pre"> </span>i use the "GstElement" pointer as the sink element in version 0.10.x, it works well except in version v 1.0.9 :(</div><div><br></div><div><span class="Apple-tab-span" style="white-space:pre"> </span>i do not know really why…..maybe some flag(or data) is lost if i do not cast to real type...</div><div><span class="Apple-tab-span" style="white-space:pre"> </span></div>
<div><div><br></div><div>Thanks,</div><div><br></div><div>- Jojo</div><div><br></div></div>
<p style="color: #A0A0A8;">在 2013年8月27日星期二，上午7:02，Wonchul Lee 写道：</p>
<blockquote type="cite" style="border-left-style:solid;border-width:1px;margin-left:0px;padding-left:10px;">
<span><div><div><div dir="ltr">In addition, you should set the 'emit-signals' property to TRUE value for appsink element.</div><div><br><br><div>2013/8/27 Wonchul Lee <span dir="ltr"><<a href="mailto:chul0812@gmail.com" target="_blank">chul0812@gmail.com</a>></span><br><blockquote type="cite"><div><div dir="ltr">At the cb_new_buffer, you can get the buffer.<div>Like as blow code.</div><div><pre style="white-space:pre-wrap;word-wrap:break-word">static GstFlowReturn
cb_new_buffer(GstElement * sink)
{
GstSample *sample;
GstCaps *caps;
GstBuffer *buf;</pre><pre style="white-space:pre-wrap;word-wrap:break-word"> g_signal_emit_by_name (sink, "pull-sample", &sample);</pre><pre style="white-space:pre-wrap;word-wrap:break-word"><pre style="word-wrap:break-word;white-space:pre-wrap"> caps = gst_sample_get_caps (sample);
buf = gst_sample_get_buffer (sample);
</pre><div><br></div> if (sample) {
gst_sample_unref (sample);
}
return GST_FLOW_OK;
}</pre><pre style="white-space:pre-wrap;word-wrap:break-word"><br></pre><pre style="white-space:pre-wrap;word-wrap:break-word">GstSample contains the reference of buffer and caps data.</pre>
<pre style="white-space:pre-wrap;word-wrap:break-word">You should unref after use the sample data.</pre><pre style="white-space:pre-wrap;word-wrap:break-word">It is the reason why blocked after got the first data.</pre>
</div></div><div><div><div><br><br><div>2013/8/27 Brendan Long <span dir="ltr"><<a href="mailto:self@brendanlong.com" target="_blank">self@brendanlong.com</a>></span><br><blockquote type="cite"><div>
<div text="#000000" bgcolor="#FFFFFF">
<div>How are you getting the sample? Is it
possible that you're accidentally blocking the pipeline?I think
you're supposed to use "pull-sample" to get the new sample, but if
you call "pull-sample" where there is no sample, it will block,
and depending on how you're running your pipeline, that could
block everything. That's just a guess though, since you're not
showing very much of your code.<div><div><br>
<br>
On 08/24/2013 05:18 AM, jojo wrote:<br>
</div></div></div><blockquote type="cite"><div><div><div>
<div> Hi, </div>
<div><span style="white-space:pre-wrap"> </span>i
use the simplest pipe line again as bellow:</div>
<div><br>
</div>
<div><span style="white-space:pre-wrap"> </span>pipe
= gst_parse_launch("appsrc is-live=1 do-timestamp=1
caps=\"image/jpeg, width=1920, height=1080\" name=\"appsrc\" !
appsink name=\"appsink\"");</div>
<div><br>
</div>
<div><span style="white-space:pre-wrap"> </span>it
can get the first 1 "sample" just only.</div>
<div>
<div><br>
</div>
<div>Thanks,</div>
<div><br>
</div>
<div>- Jojo</div>
<div><br>
</div>
</div>
<p style="color:#a0a0a8">在 2013年8月24日星期六，下午5:17，jojo 写道：</p><blockquote type="cite"><div>
<span>
<div>
<div>
<div>Hi, </div>
<div><span style="white-space:pre-wrap"> </span>My pipeline is
:</div>
<div><br>
</div>
<div><span style="white-space:pre-wrap"> </span>pipe
= gst_parse_launch("appsrc is-live=1 do-timestamp=1
caps=image/jpeg, width=1920, height=1080 name=\"appsrc\"
! decodebin ! queue ! videoconvert ! appsink
caps=\"%s\" name=\"appsink\",
GST_VIDEO_CAPS_MAKE("BGRx")).</div>
<div><br>
</div>
<div><span style="white-space:pre-wrap"> </span>g_signal_connect
(appsink, "new-sample", G_CALLBACK (cb_new_buffer),
data);</div>
<div><br>
</div>
<div><span style="white-space:pre-wrap"> </span>in the
gstreamer v0.10, the callback is triggered if there are
new buffer, but i can not get new data from this
callback in the version 1.0.9,</div>
<div><br>
</div>
<div><span style="white-space:pre-wrap"> </span>some of my
parameters of "gst_parse_launch" are wrong ?</div>
<div><br>
</div>
<div><span style="white-space:pre-wrap"> </span>Any hins will
be helpful.</div>
<div>
<div><br>
</div>
<div>Thanks,</div>
<div><br>
</div>
<div>- Jojo</div>
<div><br>
</div>
</div>
</div>
</div>
</span> </div></blockquote><div> <br>
</div>
<br>
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