SUMMARY STEPS TO REPRODUCE 1. Save the Gain effect with the desired value under the name "MyGain" 2. Click the "Show all custom effects" button on the effects panel 3. select Video clip with sound (grouped) on the timeline 4. Click 2 times on MyGain in the effects panel OBSERVED RESULT The effect will apply to the video clip and not to the sound clip and will not affect the volume. SOFTWARE/OS VERSIONS Linux/KDE Plasma: Kubuntu 18.04.2 (available in About System) KDE Plasma Version: 5.12.8 KDE Frameworks Version: 5.44.0 Qt Version: 5.9.5
Yes, a bug made all custom effects incorrectly categorized as video effects, making custom audio effects unusable. Should be fixed in 19.08.1 released this week.
Issue see here: https://invent.kde.org/kde/kdenlive/issues/336. Please test ones 19.08.1 is out.