SUMMARY When using Kdenlive I wanted to create a clip that's played in reverse, but when it's been created, Kdenlive likes to lag out and stutter on playback of that reversed clip, this should not even be a problem, why is this even a thing? it should reference the original clip in the project bin and playback at it's normal speed, and at least hand it off to the GPU to play back, or automatically create a proxy clip profile of the video clip that it's based on. STEPS TO REPRODUCE 1. Select a clip and reverse clip. 2. 3. OBSERVED RESULT Reversed Clip will lag and stutter on playback making it impossible to work with. EXPECTED RESULT It should just play back as normal as if it weren't reversed. SOFTWARE/OS VERSIONS Linux: Manjaro Linux Qt Version: 5.15.3
I reversed a clip in the timeline with change speed -> reverse clip. And yes the playback is slow and stutters. You can make preview more smooth using the preview settings: https://docs.kdenlive.org/de/glossary/useful_information/timeline-preview-rendering.html?highlight=preview
(In reply to emohr from comment #1) > I reversed a clip in the timeline with change speed -> reverse clip. And yes > the playback is slow and stutters. > > You can make preview more smooth using the preview settings: > https://docs.kdenlive.org/de/glossary/useful_information/timeline-preview- > rendering.html?highlight=preview While this is a useful feature, there's still significant lag and stuttering even when you've rendered a preview zone. I feel this is something that should be passed to GPU for playback rendering, instead of tasking the CPU to play it back.