<meta http-equiv=Content-Type content="text/html; charset=utf-8"> <meta name=Generator content="Microsoft Word 12 (filtered medium)">  </style>  <div class=Section1> <p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif"; color:navy'>Hi again,<o:p></o:p></span></p> <p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif"; color:navy'><o:p> </o:p></span></p> <p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif"; color:navy'>I think you are right, Marco, about the caps of the buffer. I didn’t think about that! <o:p></o:p></span></p> <p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif"; color:navy'>I haven’t been able to get it to work, though.<o:p></o:p></span></p> <p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif"; color:navy'>At first I tried:<o:p></o:p></span></p> <p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:10.0pt;font-family:"Courier New"'>  base_caps = gst_caps_copy (gst_pad_get_pad_template_caps (filter->srcpad));<o:p></o:p></span></p> <p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:10.0pt;font-family:"Courier New"'>  gst_buffer_set_caps(outbuf, base_caps);<o:p></o:p></span></p> <p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif"; color:navy'><o:p> </o:p></span></p> <p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif"; color:navy'>But I got the error:<o:p></o:p></span></p> <p class=MsoNormal><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New"'>** (gst-launch-0.10:6344): CRITICAL **: file ..\Source\gstreamer\gst\gstpad.c: line 2508: assertion `caps == NULL || gst_caps_is_fixed (caps)' failed<o:p></o:p></span></p> <p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif"; color:navy'><o:p> </o:p></span></p> <p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif"; color:navy'>So I tried to remove the fixed caps and use _<i>set</i>_caps-functions for the pads.<o:p></o:p></span></p> <p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif"; color:navy'>But what do I need to do in the _<i>set</i>_caps-functions? The input to the encoder has a fixed format and the output from the decoder has the same fixed format.<o:p></o:p></span></p> <p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif"; color:navy'>The compressed audio could have different rates, that could be represented in the caps. Do the _set_caps for the sink-pad need to set the caps of the source?<o:p></o:p></span></p> <p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"; color:navy'>I tried:<o:p></o:p></span></p> <p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt; font-family:"Courier New"'>  ...<o:p></o:p></span></p> <p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt; font-family:"Courier New"'>  filter = GST_GtestENC (gst_pad_get_parent (pad));<o:p></o:p></span></p> <p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt; font-family:"Courier New"'>  otherpad = (pad == filter->srcpad) ? filter->sinkpad : filter->srcpad;<o:p></o:p></span></p> <p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt; font-family:"Courier New"'>  </span><span lang=EN-US style='font-size: 10.0pt;font-family:"Courier New"'>base_caps = gst_caps_copy (GST_PAD_CAPS(otherpad));<o:p></o:p></span></p> <p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Courier New"; color:blue'>  return</span><span lang=EN-US style='font-size:10.0pt; font-family:"Courier New"'> gst_pad_set_caps (otherpad, base_caps);</span><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif"; color:navy'> <o:p></o:p></span></p> <p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif"; color:navy'><o:p> </o:p></span></p> <p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif"; color:navy'>But I get an empty caps from GST_PAD_CAPS(filter->sinkpad) and gst_caps_copy gives this error:<o:p></o:p></span></p> <p class=MsoNormal><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New"'>** (gst-launch-0.10:6724): CRITICAL **: file ..\Source\gstreamer\gst\gstcaps.c: line 280: assertion `GST_IS_CAPS (caps)' failed<o:p></o:p></span></p> <p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif"; color:navy'><o:p> </o:p></span></p> <p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif"; color:navy'>However. In my “real” encoder/decoder I <i>do</i> set the caps in my _chain-function:<o:p></o:p></span></p> <p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:10.0pt;font-family:"Courier New"'>  ret =<o:p></o:p></span></p> <p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:10.0pt;font-family:"Courier New"'>    gst_pad_alloc_buffer_and_set_caps (filter->srcpad, GST_BUFFER_OFFSET_NONE,<o:p></o:p></span></p> <p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:10.0pt;font-family:"Courier New"'>               FRAME_LENGTH, GST_PAD_CAPS (filter->srcpad), &outbuf);<o:p></o:p></span></p> <p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif"; color:navy'><o:p> </o:p></span></p> <p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif"; color:navy'>But I get an error in the _<i>set</i>_caps-function for the sink in the decoder:<o:p></o:p></span></p> <p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:10.0pt;font-family:"Courier New";color:blue'>static</span><span lang=EN-US style='font-size:10.0pt;font-family:"Courier New"'> gboolean<o:p></o:p></span></p> <p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:10.0pt;font-family:"Courier New"'>gst_mydec_sink_set_caps (GstPad * pad, GstCaps * caps)<o:p></o:p></span></p> <p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:10.0pt;font-family:"Courier New"'>{<o:p></o:p></span></p> <p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:10.0pt;font-family:"Courier New"'>  mydec *filter;<o:p></o:p></span></p> <p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:10.0pt;font-family:"Courier New"'>  GstPad *otherpad;<o:p></o:p></span></p> <p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:10.0pt;font-family:"Courier New"'>  GstCaps *base_caps;<o:p></o:p></span></p> <p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:10.0pt;font-family:"Courier New"'>  </span><span style='font-size:10.0pt;font-family:"Courier New"'>GstFlowReturn ret;<o:p></o:p></span></p> <p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt; font-family:"Courier New"'><o:p> </o:p></span></p> <p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt; font-family:"Courier New"'>  filter = GST_MYDEC (gst_pad_get_parent (pad));<o:p></o:p></span></p> <p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt; font-family:"Courier New"'>  otherpad = (pad == filter->srcpad) ? filter->sinkpad : filter->srcpad;<o:p></o:p></span></p> <p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt; font-family:"Courier New"'>  </span><span lang=EN-US style='font-size: 10.0pt;font-family:"Courier New"'>base_caps = gst_caps_copy (gst_pad_get_pad_template_caps (otherpad));<o:p></o:p></span></p> <p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:10.0pt;font-family:"Courier New"'><o:p> </o:p></span></p> <p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:10.0pt;font-family:"Courier New"'>  ret = gst_pad_set_caps (otherpad, base_caps); <span style='color:green'>// error</span><o:p></o:p></span></p> <p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:10.0pt;font-family:"Courier New"'><o:p> </o:p></span></p> <p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:10.0pt;font-family:"Courier New"'>  <span style='color:blue'>return</span> ret;<o:p></o:p></span></p> <p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:10.0pt;font-family:"Courier New"'>}<o:p></o:p></span></p> <p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif"; color:navy'><o:p> </o:p></span></p> <p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif"; color:navy'>The error I get is:<o:p></o:p></span></p> <p class=MsoNormal><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New"; color:navy'>** (gst-launch-0.10:2964): CRITICAL **: file ..\Source\gstreamer\gst\gstpad.c: line 2508: assertion `caps == NULL || gst_caps_is_fixed (caps)' failed<o:p></o:p></span></p> <p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif"; color:navy'><o:p> </o:p></span></p> <p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif"; color:navy'>But I checked with </span><span lang=EN-US style='font-size:10.0pt; font-family:"Courier New"'>GST_IS_CAPS (base_caps)</span><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:navy'> and </span><span lang=EN-US style='font-size:10.0pt;font-family:"Courier New"'>gst_caps_is_fixed(base_caps)</span><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif"; color:navy'> and base_caps IS a caps and it is not fixed, so why do I get an error?<o:p></o:p></span></p> <p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif"; color:navy'><o:p> </o:p></span></p> <p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif"; color:navy'>Clearly there is something I have done wrong or misunderstood, but I can’t figure it out…<o:p></o:p></span></p> <p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif"; color:navy'><o:p> </o:p></span></p> <p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif"; color:navy'>Regards <o:p></o:p></span></p> <p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif"; color:navy'>Markus<o:p></o:p></span></p> </div> <br><hr align="left" width="300"> View this message in context: <a href="http://gstreamer-devel.966125.n4.nabble.com/Caps-problem-when-writing-encoder-decoder-tp2219436p2224288.html">SV: Caps problem when writing encoder/decoder</a><br> Sent from the <a href="http://gstreamer-devel.966125.n4.nabble.com/">GStreamer-devel mailing list archive</a> at Nabble.com.<br>