<br><br>On Saturday, June 19, 2021, gorge rankin via Cin <<a href="mailto:cin@lists.cinelerra-gg.org">cin@lists.cinelerra-gg.org</a>> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">For what it's worth, here on Ubuntu 21.04 :<div><br></div><div>ldd /usr/bin/ffmpeg |igrep rubber:<br> librubberband.so.2 => /lib/x86_64-linux-gnu/<wbr>librubberband.so.2<br></div><div><br></div><div>dpkg -l ffmpeg:<br>Desired=Unknown/Install/<wbr>Remove/Purge/Hold<br>| Status=Not/Inst/Conf-files/<wbr>Unpacked/halF-conf/Half-inst/<wbr>trig-aWait/Trig-pend<br>|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)<br>||/ Name Version Architecture Description<br>+++-==============-===========<wbr>=============-============-===<wbr>==============================<wbr>==============================<wbr>=<br>ii ffmpeg 7:4.3.2-0+deb11u1ubuntu1 amd64 Tools for transcoding, streaming and playing of multimedia files<br></div><div><br></div></div></blockquote><div><br></div><div>then setting those variables before CinGG compilation hopefully will enable rubberband</div><div><br></div><div>EXTRA_LIBS=" -lrubberband" \</div><div>FFMPEG_EXTRA_CFG=" --enable-librubberband" \</div><div><br></div><div> you can put any interesting/useful for you switches and libs here.... </div><div><br></div><div><br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sat, Jun 19, 2021 at 4:28 PM Andrew Randrianasulu via Cin <<a href="mailto:cin@lists.cinelerra-gg.org" target="_blank">cin@lists.cinelerra-gg.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><br><br>On Saturday, June 19, 2021, Andrew Randrianasulu <<a href="mailto:randrianasulu@gmail.com" target="_blank">randrianasulu@gmail.com</a>> wrote:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><br><br>On Saturday, June 19, 2021, Phyllis Smith via Cin <<a href="mailto:cin@lists.cinelerra-gg.org" target="_blank">cin@lists.cinelerra-gg.org</a>> wrote:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div dir="ltr"><div class="gmail_default" style="font-size:small">Gorge,</div><div class="gmail_default" style="font-size:small">About crashing:<br></div></div><br><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div>That's odd, it's a tweaked version <br></div></div></blockquote><div><span class="gmail_default" style="font-size:small">Not the main.cpp program but the F_atempo plugin inside of Cinelerra. Andrea is much more expert at testing the</span></div><div><span class="gmail_default" style="font-size:small">ffmpeg plugins and it did not crash for him as stated in his email. I did get the plugin to not crash but I do not know</span></div><div><span class="gmail_default" style="font-size:small">what it is doing.</span> </div></div></div></blockquote><div><br></div><div><br></div><div>random internet search says:</div><div><br></div><div>The parameter for atempo must be between 0.5 and 2.0. If you want to slow it down even more, you can use the atempo filter more than once.</div><div>Eg. to slow it down by 4:</div><div>ffmpeg -i input.mp4 -filter:a "atempo=0.5,atempo=0.5" -vn output.aac</div><div><br></div><div><br></div><div><a href="https://muzso.hu/2015/04/25/how-to-speed-up-slow-down-an-audio-stream-with-ffmpeg" target="_blank">https://muzso.hu/2015/04/25/<wbr>how-to-speed-up-slow-down-an-<wbr>audio-stream-with-ffmpeg</a></div><div><br></div></blockquote><div><br></div><div>more random internet search unearth those finds:</div><div><br></div><div><br></div><div><a href="https://patchwork.ffmpeg.org/project/ffmpeg/patch/20171202191342.25358-1-onemda@gmail.com/#21029" target="_blank">https://patchwork.ffmpeg.org/<wbr>project/ffmpeg/patch/<wbr>20171202191342.25358-1-onemda@<wbr>gmail.com/#21029</a></div><div><br></div><div>adds scaletempo filter, probably not in mainstream due to discussion about how useful or not this new filter might be. </div><div><br></div><div>for rubberband apparently you need librubberband installed and pass configuration flag to ffmpeg (cingg's build system allow this) </div><div>----</div><div>Apply time-stretching and pitch-shifting with librubberband.</div><div><br></div><div>To enable compilation of this filter, you need to configure FFmpeg with --enable-librubberband.</div><div>----</div><div> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div><br></div><div><br></div><div> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div><br></div><div>When it runs , a terminal comes up to show you the technical info. But the outfile is created.</div></div></blockquote><div><span class="gmail_default" style="font-size:small">I am still trying to compile the </span><span class="gmail_default" style="font-size:small">program because I have to put the include <libavcodec/avcodec.h> in the right place.</span></div><div><span class="gmail_default" style="font-size:small">Then I will test it. ...Phyllis<br></span></div></div></div>
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