@Georgy Thanks Georgy! I tried SlowmoVideo (AppImage) but my computer hung and did not create the final video. It worked better with the option Size=small in "Rendering Settings" and I joined the small PNGs with ffmpeg to create the mp4 video (slowmovideo created an unusable video). Excellent result was achieved with small PNGs, but with the source size (1280x720) I had no luck. And, unfortunately, the time for render at source size is too long on my Notebook. May be I wrong something. I will try again. With FFmpeg and "minterpolate" filter my computer takes relatvely little time. If you can, you can show your slowmotion video? Thank you! @Andrea_paz Thank you for your time to insert and test F_minterpolate inside CinelerraGG! IgorBeg