mp4/mov -movflags +faststart

[mifi]

-movflags +faststart will allow streaming of output MP4/MOV files

Downsides to always enabling faststart

• https://www.reddit.com/r/ffmpeg/comments/alxhlj/question_on_when_to_use_movflags_faststart/
• https://superuser.com/questions/856025/any-downsides-to-always-using-the-movflags-faststart-parameter

mp4 detect if faststart is set on input:

• https://stackoverflow.com/questions/6657759/detect-if-faststart-has-been-applied-to-video/46895695
• https://stackoverflow.com/questions/56963790/how-to-tell-if-faststart-for-video-is-set-using-ffmpeg-or-ffprobe
• https://github.com/gpac/mp4box.js
• https://github.com/videojs/mux.js
• https://github.com/gkozlenko/node-video-lib
• https://github.com/lukeschaefer/mp4js

[jbruchon]

I strongly support adding this capability ASAP, preferably with a toggle in the UI. There is a major upside when uploading faststart files to YouTube: the videos get processed while the file is still uploading!

[desertpogona]

This feature is really needed

[mifi]

because it's christmas, i've now implemented this option and will be included in the next version! 🎅