New Zealand (South Island)
Seth Kenlon is a UNIX geek, free culture advocate, independent multimedia artist, and D&D nerd. He has worked in the film and computing industry, often at the same time. He is one of the maintainers of the Slackware-based multimedia production project Slackermedia.
Authored Comments
I edit .ogv regularly in Flowblade without issue. This isn't the place for extensive troubleshooting, but I'd check what versions of FFmpeg and MLT you have installed, and possibly update those if possible. As a basis for comparison, I use ffmpeg 3.1.1 at home and work; MLT 6.0.0 at work, MLT master at home.
I personally tend to sync audio by ear, Steenbeck-style, but on-demand Audio Level display does exist:
1. Right click on a timeline clip with audio
2. Select "Display Audio Level"
3. Audio Level data is rendered and displayed
This doesn't happen in the background, currently, because (as I say in the article), the Flowblade model (consciously or not) is to provide the basics and then allow the user to request more as needed. It keeps the interface fast and lightweight, and it's one of the reasons I've been enjoying using it so much at work, where we edit huge video files, so the fewer processes I have to wait on before getting started, the better!