Re: video editing
Reply #1 –
Great video.
Have you tried using the subtitle feature in kdenlive?
I've done a test as a benchmark.
Material used for said test: https://www.youtube.com/watch?v=cZwow_u9xlE
Downloaded with:
yt-dlp --write-subs --sub-langs en -o documentary.webm 'https://www.youtube.com/watch?v=cZwow_u9xlE'
It's unusable when the subtitle is imported.
Moving through the timeline (when the subtitle is imported) without even clicking (just hovering the mouse on it) the timeline freezes kdenlive. It does not crash but heavily loads for a very long time.
Converting the video to x264 and then using the proxy clips feature doesn't seem to help.
Conversion method:
ffmpeg -hwaccel vaapi -i documentary.webm -c:v libx264 -preset veryslow -crf 17 -x264opts fast_pskip=0 -c:a copy documentary-x264.mkv
Moving through the timeline without the subtitles imported even when done really fast works fine even without enabling the proxy clips feature.