When I add the volume effect, immediately on playback Kdenlive crashes with the following gdb: [volume @ 0x7fff546dff40] [Eval @ 0x7fff967f9040] Undefined constant or missing '(' in '' [volume @ 0x7fff546dff40] Unable to parse option value "" [volume @ 0x7fff546dff40] [Eval @ 0x7fff967f9040] Undefined constant or missing '(' in '' [volume @ 0x7fff546dff40] Unable to parse option value "" [volume @ 0x7fff546dff40] [Eval @ 0x7fff967f9040] Undefined constant or missing '(' in '' [volume @ 0x7fff546dff40] Unable to parse option value "" [filt @ 0x7fff54644c40] [Eval @ 0x7fff967f9630] Undefined constant or missing '(' in ''1.0'' [filt @ 0x7fff54644c40] Error when evaluating the volume expression ''1.0'' [filter avfilter.volume] Cannot init filter I'm using the daily ppa that compiles master on Kubuntu 16.04. Reproducible: Always Steps to Reproduce: 1. Add an audio source to the timeline 2. Add the volume effect 3. Hit playback in the timeline Actual Results: crash Expected Results: no crash
I see this too. I'm using Version 16.04.2 from rpmfusion on Fedora 24.
Hello, Many filters from FFmpeg (avfilters) are not yet properly handled by MLT/Kdenlive. You should pick the MLT equivalent. From 16.07.80, we have blacklisted the problematic effects ; a better solution would be to create the XML description to handle them properly.