<div dir="ltr"><div class="gmail_extra">Dear Carl,<br></div><div class="gmail_extra"><br></div><div class="gmail_extra">Thank you for your answer. </div><div class="gmail_extra">I have another question and sorry if you find it irrelevant. </div><div class="gmail_extra"><br></div><div class="gmail_extra">1- I checked the prebuilt ffmpeg and libav-dev packages that I have got from repositories. They have --enable-shared flag and I can find .so files. Does it make a difference? </div><div class="gmail_extra"><br></div><div class="gmail_extra">>> <span style="font-size:12.8px">See </span><a href="https://ffmpeg.org/bugreports.html" rel="noreferrer" target="_blank" style="font-size:12.8px">https://ffmpeg.org/bugreports.<wbr>html</a></div><div class="gmail_extra">2-Can I use --enable-debug=3 ? </div><div class="gmail_extra"><br></div><div class="gmail_extra">>>  <span style="font-size:12.8px">My guess is that the example file is broken, patch welcome. </span></div><div class="gmail_extra"><span style="font-size:12.8px">3-I could compile it with prebuilt libav-tools from repositories and the example has not any problems.</span></div><div class="gmail_extra"><span style="font-size:12.8px"><br></span></div><div class="gmail_extra">Best,</div><div class="gmail_extra">Davood Falahati</div></div>