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<p class="MsoNormal">Hello Philipp,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<pre><span class="gmail-default"><b><span style="font-family:"Arial",sans-serif">Question 1:</span></b></span><span class="gmail-default"><span style="font-family:"Arial",sans-serif"> What other formats are possible for "<span style="color:#32B9B9">CV_FOURCC</span>"? </span></span><span style="font-family:"Arial",sans-serif"><br><br></span><o:p></o:p></pre>
<p class="MsoNormal"><a href="https://www.fourcc.org/">https://www.fourcc.org/</a> describes what exist and might be supported by our binary. The codecs are only the ones supported by ffmpeg (included as a DLLs) or your system ones.<o:p></o:p></p>
<pre><o:p> </o:p></pre>
<pre style="margin-bottom:12.0pt"><span class="gmail-default"><b><span style="font-family:"Arial",sans-serif">Question 2:</span></b></span><span class="gmail-default"><span style="font-family:"Arial",sans-serif"> What format should - ideally - the input images have? Currently I use BMP's, created with xs2bmp.<o:p></o:p></span></span></pre>
<pre style="margin-bottom:12.0pt"><span class="gmail-default"><span style="font-family:"Arial",sans-serif">Yes BMP is fine. The rational are ; for a better encoding, use lossless image format ; for speed use non-compressed ones. <o:p></o:p></span></span></pre>
<p class="MsoNormal">Thanks,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Clément<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><b>From:</b> users <users-bounces@lists.scilab.org> <b>On Behalf Of
</b>P M<br>
<b>Sent:</b> Wednesday, February 10, 2021 7:45 PM<br>
<b>To:</b> International users mailing list for Scilab. <users@lists.scilab.org><br>
<b>Subject:</b> [Scilab-users] scicv - CV_FOURCC<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Dear ,<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">from the scicv toolbox I use the new_VideoWriter - function:
<o:p></o:p></p>
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<pre style="margin-bottom:12.0pt"><span class="gmail-default">videoWriter = </span><span class="gmail-functionid">new_VideoWriter</span><span class="gmail-default">(filename, fourcc, fps, frameSize)</span><br><br><o:p></o:p></pre>
<pre><span class="gmail-default"><span style="font-family:"Arial",sans-serif">Everything fine so far, except: </span></span><span style="font-family:"Arial",sans-serif"><br><br><span class="gmail-default">There are artefacts in the final video., which I guess are connected to compression.</span></span><o:p></o:p></pre>
<pre><span class="gmail-default"><span style="font-family:"Arial",sans-serif">Here are some lines from my code:</span></span><br><br><span class="gmail-default"><span style="color:black">videoWriter </span><span style="color:#5C5C5C">=</span><span style="color:black"> </span><span style="color:#32B9B9">new_VideoWriter</span><span style="color:#4A55DB">(</span><span style="color:black">outPath, </span><span style="color:#32B9B9">CV_FOURCC</span><span style="color:#4A55DB">(</span><span style="color:rosybrown">'M'</span><span style="color:black">, </span><span style="color:rosybrown">'P'</span><span style="color:black">, </span><span style="color:rosybrown">'4'</span><span style="color:black">, </span><span style="color:rosybrown">'2'</span><span style="color:#4A55DB">)</span><span style="color:black">, frameRate, </span><span style="color:#32B9B9">size</span><span style="color:#4A55DB">(</span><span style="color:black">img</span><span style="color:#4A55DB">))</span><span style="color:black">;<o:p></o:p></span></span></pre>
<pre><span class="gmail-default"><span style="color:black"><o:p> </o:p></span></span></pre>
<pre><span class="gmail-default"><span style="color:#A020F0">if</span><span style="color:black"> </span><span style="color:#5C5C5C">~</span><span style="color:#32B9B9">VideoWriter_isOpened</span><span style="color:#4A55DB">(</span><span style="color:black">videoWriter</span><span style="color:#4A55DB">)</span><span style="color:black"> </span><span style="color:#A020F0">then</span><span style="color:black"><o:p></o:p></span></span></pre>
<pre><span class="gmail-default"><span style="color:black"> </span><span style="color:#32B9B9">disp</span><span style="color:#4A55DB">(</span><span style="color:rosybrown">"Cannot create video file: "</span><span style="color:black"> </span><span style="color:#5C5C5C">+</span><span style="color:black"> outPath</span><span style="color:#4A55DB">)</span><span style="color:black">;<o:p></o:p></span></span></pre>
<pre><span class="gmail-default"><span style="color:#A020F0">end</span><span style="color:black"><o:p></o:p></span></span></pre>
<pre><span class="gmail-default"><span style="color:black"><o:p> </o:p></span></span></pre>
<pre><span class="gmail-default"><span style="color:#A020F0">for</span><span style="color:black"> i </span><span style="color:#5C5C5C">=</span><span style="color:black"> </span><span style="color:rosybrown">1</span><span style="color:#FFAA00">:</span><span style="color:black">nrOfFiles<o:p></o:p></span></span></pre>
<pre><span class="gmail-default"><span style="color:black"> img </span><span style="color:#5C5C5C">=</span><span style="color:black"> </span><span style="color:#32B9B9">imread</span><span style="color:#4A55DB">(</span><span style="color:black">inPath</span><span style="color:#4A55DB">(</span><span style="color:black">i</span><span style="color:#4A55DB">))</span><span style="color:black">;<o:p></o:p></span></span></pre>
<pre><span class="gmail-default"><span style="color:black"> </span><span style="color:#32B9B9">VideoWriter_write</span><span style="color:#4A55DB">(</span><span style="color:black">videoWriter, img</span><span style="color:#4A55DB">)</span><span style="color:black">;<o:p></o:p></span></span></pre>
<pre><span class="gmail-default"><span style="color:black"> </span><span style="color:#32B9B9">disp</span><span style="color:#4A55DB">(</span><span style="color:black">i</span><span style="color:#4A55DB">)</span><span style="color:black"><o:p></o:p></span></span></pre>
<pre><span class="gmail-default"><span style="color:#A020F0">end</span><span style="color:black"><o:p></o:p></span></span></pre>
<pre><span class="gmail-default"><span style="color:black"><o:p> </o:p></span></span></pre>
<pre style="margin-bottom:12.0pt"><span class="gmail-default"><span style="color:#32B9B9">delete_VideoWriter</span><span style="color:#4A55DB">(</span><span style="color:black">videoWriter</span><span style="color:#4A55DB">)</span><span style="color:black">;</span></span><o:p></o:p></pre>
<pre><span class="gmail-default"><b><span style="font-family:"Arial",sans-serif">Question 1:</span></b></span><span class="gmail-default"><span style="font-family:"Arial",sans-serif"> What other formats are possible for "<span style="color:#32B9B9">CV_FOURCC</span>"? </span></span><span style="font-family:"Arial",sans-serif"><br><span class="gmail-default">I just used <span style="color:rosybrown">'M'</span><span style="color:black">,</span> <span style="color:rosybrown">'P'</span><span style="color:black">,</span> <span style="color:rosybrown">'4'</span><span style="color:black">,</span> <span style="color:rosybrown">'2'</span> , because it's the only mentioned in the help.</span></span><o:p></o:p></pre>
<pre><o:p> </o:p></pre>
<pre style="margin-bottom:12.0pt"><span class="gmail-default"><b><span style="font-family:"Arial",sans-serif">Question 2:</span></b></span><span class="gmail-default"><span style="font-family:"Arial",sans-serif"> What format should - ideally - the input images have? Currently I use BMP's, created with xs2bmp.</span></span><o:p></o:p></pre>
<pre><span class="gmail-default"><span style="font-family:"Arial",sans-serif">Thank you,</span></span><o:p></o:p></pre>
<pre><span class="gmail-default"><span style="font-family:"Arial",sans-serif">Philipp</span></span><o:p></o:p></pre>
<pre><o:p> </o:p></pre>
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