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<p class="MsoNormal">Hi, <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I am having problems creating a drawtext filter graph using avfilter_graph_create_filter.<o:p></o:p></p>
<p class="MsoNormal">I want to set the x and y position of the text from values stored in metadata.
<o:p></o:p></p>
<p class="MsoNormal">This approach works for the text, but not for x and y.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">The code I am using is a follows:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style="line-height:12.2pt"><span style="font-size:10.0pt;font-family:"Courier New";color:#888888;mso-fareast-language:EN-GB"> // Create the text filter</span><span style="font-size:10.0pt;font-family:"Courier New";color:#333333;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class="MsoNormal" style="line-height:12.2pt"><span style="font-size:10.0pt;font-family:"Courier New";color:#333333;mso-fareast-language:EN-GB"> String ^font = Path::Combine(AppDomain::CurrentDomain->BaseDirectory,
<span style="background:#FFF0F0">"DejaVuSansMono-Bold.ttf"</span>);<o:p></o:p></span></p>
<p class="MsoNormal" style="line-height:12.2pt"><span style="font-size:10.0pt;font-family:"Courier New";color:#333333;mso-fareast-language:EN-GB"> font = font->Replace(</span><span style="font-size:10.0pt;font-family:"Courier New";color:#0044DD;mso-fareast-language:EN-GB">'\\'</span><span style="font-size:10.0pt;font-family:"Courier New";color:#333333;mso-fareast-language:EN-GB">,
</span><span style="font-size:10.0pt;font-family:"Courier New";color:#0044DD;mso-fareast-language:EN-GB">'/'</span><span style="font-size:10.0pt;font-family:"Courier New";color:#333333;mso-fareast-language:EN-GB">);<o:p></o:p></span></p>
<p class="MsoNormal" style="line-height:12.2pt"><span style="font-size:10.0pt;font-family:"Courier New";color:#333333;mso-fareast-language:EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal" style="line-height:12.2pt"><span style="font-size:10.0pt;font-family:"Courier New";color:#333333;mso-fareast-language:EN-GB"> ostringstream oss2;
<o:p></o:p></span></p>
<p class="MsoNormal" style="line-height:12.2pt"><span style="font-size:10.0pt;font-family:"Courier New";color:#333333;mso-fareast-language:EN-GB"> oss2 <<
<span style="background:#FFF0F0">"fontfile='"</span> << marshal_as<string>(font) <<
<span style="background:#FFF0F0">"':"</span><o:p></o:p></span></p>
<p class="MsoNormal" style="line-height:12.2pt"><span style="font-size:10.0pt;font-family:"Courier New";color:#333333;mso-fareast-language:EN-GB">
<span style="background:#FFF0F0">"borderw=1:"</span><o:p></o:p></span></p>
<p class="MsoNormal" style="line-height:12.2pt"><span style="font-size:10.0pt;font-family:"Courier New";color:#333333;mso-fareast-language:EN-GB">
<span style="background:#FFF0F0">"fontsize=16:"</span><o:p></o:p></span></p>
<p class="MsoNormal" style="line-height:12.2pt"><span style="font-size:10.0pt;font-family:"Courier New";color:#333333;mso-fareast-language:EN-GB">
<span style="background:#FFF0F0">"text='%{metadata:overlay}':"</span><o:p></o:p></span></p>
<p class="MsoNormal" style="line-height:12.2pt"><span style="font-size:10.0pt;font-family:"Courier New";color:#333333;mso-fareast-language:EN-GB">
<span style="background:#FFF0F0">"bordercolor=white:"</span><o:p></o:p></span></p>
<p class="MsoNormal" style="line-height:12.2pt"><span style="font-size:10.0pt;font-family:"Courier New";color:#333333;mso-fareast-language:EN-GB">
<span style="background:#FFF0F0">"x='%{metadata:xpos}':"</span><o:p></o:p></span></p>
<p class="MsoNormal" style="line-height:12.2pt"><span style="font-size:10.0pt;font-family:"Courier New";color:#333333;mso-fareast-language:EN-GB">
<span style="background:#FFF0F0">"y=(12):"</span>;<o:p></o:p></span></p>
<p class="MsoNormal" style="line-height:12.2pt"><span style="font-size:10.0pt;font-family:"Courier New";color:#333333;mso-fareast-language:EN-GB">
<o:p></o:p></span></p>
<p class="MsoNormal" style="line-height:12.2pt"><span style="font-size:10.0pt;font-family:"Courier New";color:#333333;mso-fareast-language:EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal" style="line-height:12.2pt"><span style="font-size:10.0pt;font-family:"Courier New";color:#333333;mso-fareast-language:EN-GB"> AVFilterContext *drawText;<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt;line-height:12.2pt"><span style="font-size:10.0pt;font-family:"Courier New";color:#333333;mso-fareast-language:EN-GB"> error = avfilter_graph_create_filter(&drawText, drawTextFilter, nullptr, oss2.str().c_str(),
nullptr, filterGraph);<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";color:#333333;mso-fareast-language:EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal">The error message I get is.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Setting 'width' to value '100'<o:p></o:p></p>
<p class="MsoNormal">Setting 'height' to value '100'<o:p></o:p></p>
<p class="MsoNormal">Setting 'pix_fmt' to value '3'<o:p></o:p></p>
<p class="MsoNormal">Setting 'time_base' to value '1/1000'<o:p></o:p></p>
<p class="MsoNormal">w:100 h:100 pixfmt:bgr24 tb:1/1000 fr:0/1 sar:1/1 sws_param:<o:p></o:p></p>
<p class="MsoNormal">Setting 'fontfile' to value 'DejaVuSansMono-Bold.ttf'<o:p></o:p></p>
<p class="MsoNormal">Setting 'borderw' to value '1'<o:p></o:p></p>
<p class="MsoNormal">Setting 'fontsize' to value '16'<o:p></o:p></p>
<p class="MsoNormal">Setting 'text' to value '%{metadata:overlay}'<o:p></o:p></p>
<p class="MsoNormal">Setting 'bordercolor' to value 'white'<o:p></o:p></p>
<p class="MsoNormal">Setting 'x' to value '%{metadata:xpos}'<o:p></o:p></p>
<p class="MsoNormal">Setting 'y' to value '%{metadata:ypos}'<o:p></o:p></p>
<p class="MsoNormal">query_formats: 3 queried, 2 merged, 0 already done, 0 delayed<o:p></o:p></p>
<p class="MsoNormal"><b>Undefined constant or missing '(' in '%{metadata:xpos}'<o:p></o:p></b></p>
<p class="MsoNormal"><b>Failed to configure input pad on (null)<o:p></o:p></b></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I have tried various other combinations… none of the following work.<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo2"><![if !supportLists]><span style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]>"x=('%{metadata:xpos}'):"<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo2"><![if !supportLists]><span style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]>"x=('%{metadata\\:xpos}'):"<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo2"><![if !supportLists]><span style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]> "x=(%{metadata:xpos}):"<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Any assistance would be appreciated.<o:p></o:p></p>
<p class="MsoNormal">Thanks in advance<o:p></o:p></p>
<p class="MsoNormal">Jonathan<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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