On Mon, Feb 1, 2021 at 10:33 PM ilkercan Kaya <canilkerk...@gmail.com> wrote:
> A simpler solution, if you only need to implement enabling and disabling >> some of the filters, you can expect the "timeline" support does the >> trick: > > > I looked at timeline support, correct me if I am wrong but it is done > through the *enable_str *property of *AVFilterContext*. It is activated > with *avfilter_init_str *call. This seems like setting the *enable_str * > 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. > enable option is also command for every filter that supports timeline. Yes it looks like not documented explicitly. Just tried it and works. mpv crowd_run_1080p50.y4m -vf "lavfi=[sendcmd=2.0 colorcorrect enable 0,colorcorrect=saturation=0]" > > On Mon, Feb 1, 2021 at 11:10 PM Paul B Mahol <one...@gmail.com> wrote: > >> lowpass, highpass and agate on master git version have both timeline and >> command support. >> >> On Mon, Feb 1, 2021 at 7:39 PM ilkercan Kaya <canilkerk...@gmail.com> >> wrote: >> >>> Hi Everyone, >>> >>> 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. >>> >>> 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: >>> >>> abuffer -> lowpass -> highpass -> agate -> aformat -> abuffersink. >>> >>> 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). >>> >>> What would be the best way to do this? >>> >>> Thank you! >>> _______________________________________________ >>> Libav-user mailing list >>> Libav-user@ffmpeg.org >>> https://ffmpeg.org/mailman/listinfo/libav-user >>> >>> To unsubscribe, visit link above, or email >>> libav-user-requ...@ffmpeg.org with subject "unsubscribe". >> >> _______________________________________________ >> Libav-user mailing list >> Libav-user@ffmpeg.org >> https://ffmpeg.org/mailman/listinfo/libav-user >> >> To unsubscribe, visit link above, or email >> libav-user-requ...@ffmpeg.org with subject "unsubscribe". > > _______________________________________________ > Libav-user mailing list > Libav-user@ffmpeg.org > https://ffmpeg.org/mailman/listinfo/libav-user > > To unsubscribe, visit link above, or email > libav-user-requ...@ffmpeg.org with subject "unsubscribe".
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