<div dir="ltr"><div dir="ltr"><br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Feb 1, 2021 at 10:33 PM ilkercan Kaya <<a href="mailto:canilkerkaya@gmail.com">canilkerkaya@gmail.com</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"><div dir="ltr"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">A simpler solution, if you only need to implement enabling and disabling<br>some of the filters, you can expect the "timeline" support does the<br>trick:</blockquote><div><br></div><div>I looked at timeline support, correct me if I am wrong but it is done through the <b><i>enable_str </i></b>property of <b><i>AVFilterContext</i></b>. It is activated with <i style="font-weight:bold">avfilter_init_str </i>call. This seems like setting the
<b><i>enable_str </i></b>
evaluation can only be done once without reiniting the whole graph. If this is the case, is there a way to pass a custom variable to the expression so that I can switch it on or off? The case in the example at the documentation, smartblur is hardcoded to be activated between 10 seconds to 3 minutes, in my case I can not foresee when the filter will be turned on/off.</div></div></blockquote><div><br></div><div>enable option is also command for every filter that supports timeline. Yes it looks like not documented explicitly.</div><div><br></div><div>Just tried it and works.</div><div><br></div><div>mpv crowd_run_1080p50.y4m -vf "lavfi=[sendcmd=2.0 colorcorrect enable 0,colorcorrect=saturation=0]"<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"><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Feb 1, 2021 at 11:10 PM Paul B Mahol <<a href="mailto:onemda@gmail.com" target="_blank">onemda@gmail.com</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"><div dir="ltr">lowpass, highpass and agate on master git version have both timeline and command support.</div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Feb 1, 2021 at 7:39 PM ilkercan Kaya <<a href="mailto:canilkerkaya@gmail.com" target="_blank">canilkerkaya@gmail.com</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"><div dir="ltr"><div dir="auto">Hi Everyone, </div><div dir="auto"><br></div>I am making a mobile music app where the user can add multiple different FXS at runtime to current playing music through a two dimensional pad with an effects header. I am using FFmpeg, libavfilter in C++ to add multiple
FX to the audio. <div dir="auto"><br></div><div>My problem is, the user can disable any of the FX's I am using at any time as they wish, the effects I use are agate, lowpass, highpass. The graph is:<br><br>abuffer -> lowpass -> highpass -> agate -> aformat -> abuffersink.<br><br>From time to time, I want to disable some of the following
lowpass, highpass, agate. So I thought I could just reconfigure the graph and basically get rid of links to fulfil my wish. I am not sure this is the right way to do it tho. I tried to dig online but all I could find was a thread from 2012 with no conclusion. Libavfilter documentation doesn't say anything about reconfigure or reset existing filtergraph (of that I could find).<br><br>What would be the best way to do this?</div><div><br></div><div>Thank you!</div></div>
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