<br><br>On Saturday, June 19, 2021, Phyllis Smith 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"><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">https://muzso.hu/2015/04/25/how-to-speed-up-slow-down-an-audio-stream-with-ffmpeg</a></div><div><br></div><div><br></div><div><br></div><div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;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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