[FFmpeg-user] Improve recording in .mp4 format

[Moritz Barsnick]

> Any chance to have a duration that updates over time?

My PVR (a.k.a. STB) is capable of updating the duration of a TS
(MPEG Transport Stream) while it is being created. It works perfectly
e.g. while using ffmpeg to convert something directly to the PVR's
(remotely mounted) disk.

I'm not sure whether that's of any help to you though, and I haven't
seen other (SW) player be so smart yet. :)

Moritz