If I might offer a few suggestions,
From the stories I've heard, Blender provides a good video editing suite
these days, which should include all the support needed for multiple video and audio inputs and transitioning between them. Blender is also a project with very active development and the aim of being part of a production pipeline. The most obvious problem with Blender is overcoming the learning curve.
And if we're talking live casting, OBS (open broadcaster software) is used a lot now, in favor of proprietary solutions such as X-split even, and should also handle multiple audio and video sources without problem and can also do overlays.
Finally, perhaps the people behind FOSDEM might also offer some advice: video@fosdem.org
Cheers,
Bas
On 2018年03月31日 15:33, Stefan Dösinger wrote:
Am 31.03.2018 um 09:43 schrieb Francois Gouget fgouget@free.fr:
On Fri, 30 Mar 2018, Stefan Dösinger wrote: [...]
What would be highly welcome is help with editing the videos afterwards. If someone has the patience to create subtitles for everything we'd make life easier for non-native speakers.
What software do you use for the editing? Avidemux? With a pinch of Audacity? What format do you use for the vidéo during editing?
I used Cinelerra. It is horribly buggy, but it was the only software I could find that was able to work with multiple video (camera, slides) and audio (camera, phones) input streams and allowed me to mix and match between them. I generally kept the video in its original format, and had Cinelerra output motion jpeg with the lowest possible compression ratio and then compressed it into mp4 with VLC. Cinelerra's MP4 output produced ungodly huge files.
In my search for video editing software Avidemux and Audacity did not come up. Avidemux looks rather simplistic, and I'm not sure if Audacity supports video.
Adobe Premiere is a commercial solution I know of, but it has a rather steep price tag.