Avfilter.acompressor (and other effects missing)

Help
1

As an ex-Sound Designer and Sound Mixing Engineer I would say that for a audio work, EQ, Compressor, Limiter, Fade in/out and Meters, are the most essential tools. and you need all of them.

Compressors available in kdenlive are some odd, non standard ones. Standard compressor should have threshold and ratio parameters. There is “Simple compressor” with threshold, but I can’t move the slider. On the other hand there is avfilter.acompressor that looks like standard one but it is not currently available in kdenlive. And I can see there is an acompressor.xml inside AppImage, but it is not loading in kdenlive. There is an output to terminal that shows that problem, alongside other effects/filters missing:

plugin not available: "avfilter.acompressor"
plugin not available: "avfilter.aecho"
plugin not available: "avfilter.agate"
plugin not available: "avfilter.atadenoise"
plugin not available: "avfilter.bs2b"
plugin not available: "avfilter.bwdif"
plugin not available: "avfilter.deblock"
plugin not available: "avfilter.dedot"
plugin not available: "avfilter.deflate"
plugin not available: "avfilter.derain"
plugin not available: "avfilter.doubleweave"
plugin not available: "avfilter.field"
plugin not available: "avfilter.framestep"
plugin not available: "avfilter.fspp"
plugin not available: "avfilter.graphmonitor"
plugin not available: "avfilter.hqdn3d"
plugin not available: "avfilter.inflate"
plugin not available: "avfilter.lagfun"
plugin not available: "avfilter.loudnorm"
plugin not available: "avfilter.random"
plugin not available: "avfilter.removegrain"
plugin not available: "avfilter.separatefields"
plugin not available: "avfilter.shuffleplanes"
plugin not available: "avfilter.sofalizer"
plugin not available: "avfilter.sr"
plugin not available: "avfilter.tmix"
plugin not available: "avfilter.w3fdif"
plugin not available: "avfilter.weave"
plugin not available: "avfilter.yadif"
plugin not available: "frei0r.baltan"
plugin not available: "frei0r.bgsubtract0r"
plugin not available: "frei0r.delay0r"
plugin not available: "frei0r.delaygrab"
plugin not available: "frei0r.lightgraffiti"
plugin not available: "frei0r.lightgraffiti"
plugin not available: "frei0r.tehRoxx0r"
plugin not available: "avfilter.greyedge"
plugin not available: "ladspa"
plugin not available: "ladspa"
plugin not available: "ladspa"
plugin not available: "ladspa"
plugin not available: "ladspa"
plugin not available: "ladspa"
plugin not available: "ladspa"
plugin not available: "ladspa"
plugin not available: "ladspa"
plugin not available: "ladspa"
plugin not available: "ladspa"
plugin not available: "movit.unsharp_mask"
plugin not available: "timewarp"

Nice thing is that ACE Compressor from Ardour is available in kdenlive after installation of Ardour, LV2 LSP Compressor on the other hand shuts down the kdenlive when I try to use it. But that is another topic and not priority at this moment :slight_smile:

I guess we can get afvilter.acompressor running easier than debugging problem with LV2 plugins

1 Like
2

Most of the effects we make available are 3rd party plugins, LADPSA/frei0r/avfilter - so in theory if they don’t need Very Special controls you can always drop more of them in or even make your own - though there can be a few catches with that depending on which build you’re using.

And there’s a few that have been blacklisted because historically they’ve caused trouble, or do need explict xml files to be controlled correctly.

Looks like avfilter.acompressor wins both prizes - it has an explicit xml to configure it, and is in the blackist under “Crashing avfilters (would require an XML file to correctly define parameters”, since 2016 - and it didn’t make the set noted as explicitly tested in 2024, though I can’t tell you offhand if it failed or just didn’t get tested.

@berndmj should be able to tell you more when he sees this, he’s been pretty actively working through the effects and xml files - but this is definitely in the space where feedback from people who really know what they’re doing and what they need is very welcome.

There’s lot of things we need to fix to be able to do more than fairly trivial audio work, but that dot has been getting larger on the radar - so if you have very explicit things that you think we should add or do, it’s probably worth kicking that list around here and tracking whatever shakes out of it as actionable as an issue for the roadmap.

3

The audio effects need more TLC, that’s for sure, and I will look into this in more detail once I’m back from vacation (one more week) :wink:

I do appreciate your technical insights, @plehho, and will certainly reach out to you for testing and questions.

1 Like
4

I will be happy to help/contribute

1 Like
5

SC4 – (ladspa.1882) is probably the best audio compressor in Kdenlive.
Steve Harris’ LADSPA SWH plugins must be installed.

grafik
grafik556×365 36.3 KB