Two major usability issues for Windows users.

1. According to https://kdenlive.org/download/ , being able to encode to the most effective and most widespread codec (h264/x264) requires complicated additional steps.

After testing, it appears that without these steps, Kdenlive is not able to OPEN h264 files either.

Audacity has a similarly annoying situation, that requires manual installation of liblame-for-audacity for encoding. Decoding is supported by default at least (still a huge usability issue).

Solution: Include ffmpeg the way it needs to be included with the windows release.

Note: Free as in beer software is not even mentioned in http://www.mpegla.com/main/programs/AVC/Documents/avcweb.pdf . Also note the word "distribute" is not mentioned. You are neither selling nor manufacturing encoders/decoders. More info at https://video.stackexchange.com/questions/14694/mp4-h-264-patent-issues

2. User also has to use (install) 7z instead of being able to use windows' built-in unzip tool. Non-admin users might not be able to do this (students, kids, public computer users). As much as I love 7z, requiring it is absolutely non-standard and - again - can make it impossible to use Kdenlive.

Solution: provide kdenlive compressed in a zip file.

Related issue (also a Windows usability issue that occurs post-install): an app should not require to be manually restarted before being usable. https://bugs.kde.org/show_bug.cgi?id=390641