zznidar/lecture-speedrun

Speed up silent portions of a lecture video/audio on-the-fly! Lecture Speedrun. Prototype. Inspired by jumpcutter.

lecture-speedrun's Issues

Make this a PWA with offline support

This would allow users to watch local videos even when offline (airplane and other means of transport ...).
Once the webpage is loaded, internet connection ist sowieso not required anymore for local files.

Changing smoothing while playing sometimes causes Lecture Speedrun to stop working

In some cases, it happens that chaning the "Smoothen last n samples" setting while a video is playing causes Lecture Speedrun to break.

More precisely, it happens when you decrease that number. Apparently the indexSmoothing variable is not reset when updating settings. That means that it may happen that current loudness gets written into the array at some out-of-bound index (which apparently extends the array, creating something like [0.16436233363224984, 0.13041777660688667, empty × 39, 0.17346392315239798]).
However, in the subsequent line the index gets moduled to the new smoothing value, preventing it from reaching the last few elements of the array. Therefore, the last elements of the array may remain "loud" forever, preventing the silence from being sped up.

Possible solution: Reset the indexSmoothing variable in the updateSettings function.

Workaround for .mkv support

The following project successfully adds support for .mkv files from OBS to play in Firefox 106.0.2: https://github.com/ilian/mkv-web

Screenshare in BBB gets out of sync

Changing webcam video playback rate in BigBlueButton does not automatically change the playback rate of the screen share. Thus, they get out of sync quickly.

Affects: bbb-spedrun.js